Emerson ROC827 User Manual

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Form Number A6175

Part Number D301217X012 March 2006

ROC827 Remote Operations Controller Instruction Manual

Flow Computer Division

Revision Tracking Sheet

March 2006

This manual may be revised periodically to incorporate new or updated information. The revision date of each page appears at the bottom of the page opposite the page number. A change in revision date to any page also changes the date of the manual that appears on the front cover. Listed below is the revision date of each page (if applicable):

Page Revision

Initial issue Mar-06

ROCLINK is a trademark of one of the Emerson Process Management companies. The Emerson logo is a trademark and service mark of Emerson Electric Co. All other marks are the property of their respective owners.

While this information is presented in good faith and believed to be accurate, Fisher Controls does not guarantee satisfactory results from reliance upon such information. Nothing contained herein is to be construed as a warranty

or guarantee, express or implied, regarding the performance, merchantability, fitness or any other matter with respect to the products, nor as a recommendation to use any product or process in conflict with any patent. Fisher Controls

reserves the right, without notice, to alter or improve the designs or specifications of the products described herein.

Issued Mar-06 ii

Contents

Chapter 1 – General Information 1-1

1.1 Scope of Manual...............................................................................................................1-1

1.2 Hardware..........................................................................................................................1-2

1.2.1 Central Processor Unit (CPU)............................................................................1-5

1.2.2 Processor and Memory......................................................................................1-6

1.2.3 Real-Time Clock (RTC)......................................................................................1-6

1.2.4 Diagnostic Monitoring.........................................................................................1-7

1.2.5 Options...............................................................................................................1-7

1.3 FCC Information...............................................................................................................1-8

1.4 Firmware...........................................................................................................................1-8

1.4.1 Historical Database and Event & Alarm Log....................................................1-11

1.4.2 Meter Runs and Stations..................................................................................1-12

1.4.3 Flow Calculations.............................................................................................1-12

1.4.4 Automatic Self Tests ........................................................................................1-13

1.4.5 Low Power Modes............................................................................................1-13

1.4.6 Proportional, Integral, and Derivative (PID) .....................................................1-14

1.4.7 Function Sequence Table (FST)......................................................................1-14

1.5 ROCLINK 800 Configuration Software...........................................................................1-15

1.6 DS800 Development Suite Software..............................................................................1-16

1.7 Expanded Backplane......................................................................................................1-17

1.8 Related Specification Sheets..........................................................................................1-18

Chapter 2 – Installation and Use 2-1

2.1 Installation Requirements.................................................................................................2-1

2.1.1 Environmental Requirements.............................................................................2-2

2.1.2 Site Requirements..............................................................................................2-2

2.1.3 Compliance with Hazardous Area Standards ....................................................2-3

2.1.4 Power Installation Requirements .......................................................................2-4

2.1.5 Grounding Installation Requirements.................................................................2-4

2.1.6 I/O Wiring Requirements....................................................................................2-5

2.2 Required Tools .................................................................................................................2-5

2.3 Housing.............................................................................................................................2-5

2.3.1 Removing and Replacing End Caps ..................................................................2-6

2.3.2 Removing and Installing Wire Channel Covers..................................................2-6

2.3.3 Removing and Installing Module Covers............................................................2-7

2.4 Mounting the ROC827 on a DIN Rail...............................................................................2-7

2.4.1 Installing the DIN Rail.........................................................................................2-9

2.4.2 Securing the ROC827 on the DIN Rail...............................................................2-9

2.4.3 Removing the ROC827 from the DIN Rail .......................................................2-10

2.5 ROC800-Series Expanded Backplane (EXP) ................................................................2-10

2.5.1 Attaching an Expandable Backplane ...............................................................2-11

2.5.2 Removing an Expandable Backplane..............................................................2-12

2.6 Central Processor Unit (CPU) ........................................................................................2-13

2.6.1 Removing the CPU Module..............................................................................2-16

2.6.2 Installing the CPU Module................................................................................2-16

2.7 License Keys ..................................................................................................................2-17

2.7.1 Installing a License Key....................................................................................2-18

2.7.2 Removing a License Key..................................................................................2-19

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2.8

Startup and Operation....................................................................................................2-19

2.8.1 Startup..............................................................................................................2-20

2.8.2 Operation..........................................................................................................2-20

Chapter 3 – Power Connections 3-1

3.1 Power Input Module Descriptions.....................................................................................3-1

3.1.1 12-Volt DC Power Input Module (PM-12)...........................................................3-1

3.1.2 24-Volt DC Power Input Module (PM-24)...........................................................3-3

3.1.3 Auxiliary Output (AUX+ and AUX–)....................................................................3-4

3.1.4 Switched Auxiliary Output (AUXSW+ and AUXSW–)........................................3-6

3.2 Determining Power Consumption.....................................................................................3-7

3.2.1 Tuning the Configuration..................................................................................3-11

3.3 Removing a Power Input Module ...................................................................................3-20

3.4 Installing a Power Input Module.....................................................................................3-21

3.5 Connecting the ROC827 to Wiring.................................................................................3-21

3.5.1 Wiring the DC Power Input Module..................................................................3-22

3.5.2 Wiring the External Batteries............................................................................3-23

3.5.3 Replacing the Internal Battery..........................................................................3-25

3.6 Related Specification Sheets..........................................................................................3-26

Chapter 4 – Input/Output Modules 4-1

4.1 I/O Module Overview........................................................................................................4-1

4.2 Installation.........................................................................................................................4-3

4.2.1 Installing an I/O Module......................................................................................4-4

4.2.2 Removing an I/O Module....................................................................................4-5

4.2.3 Wiring I/O Modules.............................................................................................4-6

4.3 Analog Input Modules.......................................................................................................4-6

4.4 Analog Output Modules....................................................................................................4-8

4.5 Discrete Input Modules.....................................................................................................4-9

4.6 Discrete Output Modules................................................................................................4-10

4.7 Discrete Output Relay Modules......................................................................................4-11

4.8 Pulse Input Modules.......................................................................................................4-12

4.9 RTD Input Modules.........................................................................................................4-14

4.9.1 Connecting the RTD Wiring..............................................................................4-15

4.10 J and K Type Thermocouple Input Modules..................................................................4-16

4.11 Related Specification Sheets.........................................................................................4-21

Chapter 5 – Communications 5-1

5.1 Communications Ports and Modules Overview...............................................................5-1

5.2 Installing Communication Modules..................................................................................5-3

5.3 Removing a Communications Module.............................................................................5-4

5.4 Wiring Communications Modules....................................................................................5-5

5.5 Local Operator Interface (LOI).........................................................................................5-5

5.5.1 Using the LOI .....................................................................................................5-7

5.6 Ethernet Communications................................................................................................5-7

5.7 EIA-232 (RS-232) Serial Communications......................................................................5-9

5.8 EIA-422/485 (RS-422/485) Serial Communications Module.........................................5-10

5.8.1 EIA-422/485 (RS-422/485) Jumpers & Termination Resistors........................5-11

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5.9

Dial-up Modem Communications Module......................................................................5-12

5.10 Multi-Variable Sensor (MVS) Interface Modules............................................................5-14

5.11 HART Interface Module .................................................................................................5-16

5.12 Related Specification Sheets.........................................................................................5-20

Chapter 6 – Troubleshooting 6-1

6.1 Guidelines.........................................................................................................................6-1

6.2 Checklists .........................................................................................................................6-2

6.2.1 Serial Communications ......................................................................................6-2

6.2.2 I/O Point..............................................................................................................6-2

6.2.3 Software .............................................................................................................6-3

6.2.4 Powering Up.......................................................................................................6-3

6.2.5 MVS Module.......................................................................................................6-3

6.3 Procedures .......................................................................................................................6-4

6.3.1 Preserving Configuration and Log Data.............................................................6-4

6.3.2 Restarting the ROC827......................................................................................6-4

6.3.3 Troubleshooting Analog Input Modules..............................................................6-5

6.3.4 Troubleshooting Analog Output Modules...........................................................6-7

6.3.5 Troubleshooting Discrete Input Modules............................................................6-7

6.3.6 Troubleshooting Discrete Output Modules.........................................................6-8

6.3.7 Troubleshooting Discrete Output Relay Modules...............................................6-8

6.3.8 Troubleshooting Pulse Input Modules................................................................6-8

6.3.9 Troubleshooting RTD Input Modules .................................................................6-9

6.3.10 Troubleshooting J and K Type Thermocouple Input Modules .........................6-10

Chapter 7 – Calibration 7-1

7.1 Calibration.........................................................................................................................7-1

7.2 Preparing for Calibration...................................................................................................7-1

Appendix A – Glossary A-1

Index I-1

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Chapter 1 – General Information

This manual focuses on the hardware aspects of the ROC827 Remote Operations Controller (the “ROC827”) and the ROC800-Series expanded backplanes (“EXPs”). For information about the software, refer to the ROCLINK™ 800 Configuration Software User Manual (Form A6121).

This chapter details the structure of this manual and provides an overview of the ROC827 and its components.

In This Chapter

1.1 Scope of Manual......................................................................................1-1

1.2 Hardware .................................................................................................1-2

1.2.1 Central Processor Unit (CPU)........................................................1-5

1.2.2 Processor and Memory..................................................................1-6

1.2.3 Real-Time Clock (RTC)..................................................................1-6

1.2.4 Diagnostic Monitoring ....................................................................1-7

1.2.5 Options...........................................................................................1-7

1.3 FCC Information ......................................................................................1-8

1.4 Firmware..................................................................................................1-8

1.4.1 Historical Database and Event & Alarm Log................................1-12

1.4.2 Meter Runs and Stations .............................................................1-12

1.4.3 Flow Calculations.........................................................................1-12

1.4.4 Automatic Self Tests....................................................................1-13

1.4.5 Low Power Modes .......................................................................1-14

1.4.6 Proportional, Integral, and Derivative (PID).................................1-14

1.4.7 Function Sequence Table (FST)..................................................1-15

1.5 ROCLINK 800 Configuration Software..................................................1-15

1.6 DS800 Development Suite Software.....................................................1-17

1.7 Expanded Backplane.............................................................................1-18

1.8 Related Specification Sheets.................................................................1-19

ROC827 Instruction Manual

The ROC827 Remote Operations Controller is a microprocessor-based controller that provides the functions required for a variety of field automation applications. The ROC827 is ideal for applications requiring general logic and sequencing control; historical data archiving; multiple communication ports; Proportional, Integral, and Derivative (PID) control; and flow measurement on up to twelve meter runs. When attached to the ROC827, the ROC800-Series expanded backplanes provide the ROC827 with increased I/O capabilities.

1.1 Scope of Manual

This manual contains the following chapters:

Chapter 1 General Information

Issued Mar-06 General Information 1-1

Provides an overview of the hardware and specifications for the ROC827 and the ROC800-Series expanded backplane.

ROC827 Instruction Manual

Chapter 2 Installation and Use

Chapter 3 Power Connections

Chapter 4 Input/Output (I/O) Modules

Chapter 5 Communications

Chapter 6 Troubleshooting

Chapter 7 Calibration

Glossary Provides definitions of acronyms and terms. Index

Provides information on installation, tools, wiring, mounting the ROC827, and other essential elements of the ROC827 and EXPs.

Provides information on the Power Input modules available for the ROC827 and EXPs and provides worksheets to help determine power requirements for the ROC827 configurations.

Provides information for the Input/Output (I/O) modules available for the ROC827 and EXPs.

Provides information for the built-in communications and the optional communication modules available for the ROC827.

Provides information on diagnosing and correcting problems for the ROC827.

Provides information for calibrating Analog Inputs, HART Inputs, RTD Inputs, and MVS Inputs for the ROC827.

Provides an alphabetic listing of items and topics contained in this manual.

1.2 Hardware

The ROC827 is highly innovative and versatile with an integrated backplane to which the central processor unit (CPU), Power Input module, communication modules, and I/O modules connect. The ROC827 has three I/O module slots.

The ROC800-Series expanded backplane (EXP) attaches to the ROC827. Each EXP provides six additional I/O module slots. The ROC827 can support up to four EXPs, for a total of 27 I/O module slots in a fully configured ROC827 (six slots per EXP plus the three I/O slots on the ROC827 itself).

The ROC827 uses a Power Input module to convert external input power to the voltage levels required by the ROC827’s electronics and to monitor voltage levels to ensure proper operation. Two Power Input modules—12 Volts dc (PM-12) and 24 Volts dc (PM-24)—are available for the ROC827. For more information on the Power Input modules, refer to Chapter 3, Power Connections.

The ROC827 supports a variety of communication protocols: ROC Plus, Modbus, Modbus TCP/IP, Modbus encapsulated in TCP/IP, and Modbus with Electronic Flow Measurement (EFM) extensions.

Figure 1-1 shows the housing, typical I/O modules, and communication modules installed in a ROC827. The patented ABS (Acrylonitrile Butadiene Styrene) plastic housing has wire covers to protect the wiring terminals. The housing includes DIN rail mounts for mounting the ROC827 on a panel or in a user-supplied enclosure.

Issued Mar-06 General Information 1-2

Power Supply Module

CPU

LOI (Local Port)

EIA-232 (RS-232D)

Built-in Ethernet (Comm1)

ROC827 Instruction Manual

I/O Module (1 of 3)

Wire Channel Cover

Right End Cap

Built-in EIA-232 (RS-232C)

(Comm2)

Figure 1-1. ROC827 Base Unit (without Expanded Backplane)

The ROC827’s CPU contains the microprocessor, the firmware, a connector to the backplane, three built-in communication ports, a LightEmitting Diode (LED) low power wakeup button, a RESET button, the application license key connectors, a STATUS LED indicating system integrity, diagnostic LEDs for two of the communications ports, and the main processor.

Issued Mar-06 General Information 1-3

ROC827 Instruction Manual

Figure 1-2 shows a typical expanded backplane (EXP) populated with a full complement of six I/O modules. Each EXP is composed of the same plastic housing as the ROC827, contains six I/O slots, and has a powered backplane that easily attaches to the ROC827 and other EXPs.

Figure 1-2. ROC827 with One Expanded Backplane

The ROC827 and EXPs support nine types of Input/Output (I/O) modules, which can satisfy a wide variety of field I/O requirements (refer to Chapter 4, Input/Output Modules). I/O modules include:

 Analog Inputs (AI).  Analog Outputs (AO).  Discrete Inputs (DI).  Discrete Outputs (DO).  Digital Relay Outputs (DOR).  HART Inputs/Outputs.  Pulse Inputs (PI) – High/Low Speed.  Resistance Temperature Detector Inputs (RTD).  J and K Type Thermocouple (T/C) Inputs.

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ROC827 Instruction Manual

The ROC827 holds up to six communication ports (refer to Chapter 5, Communications). Three communication ports are built-in:

 Local Operator Interface (LOI) – Local Port EIA-232 (RS-232D).  Ethernet – Comm1 Port for use with the DS800 Development Suite

Software.

 EIA-232 (RS-232C) – Comm2 Port for point-to-point asynchronous

serial communications.

Communication modules (which install in the ROC827’s Comm3, Comm4, and Comm5 slots) provide additional ports for communicating with a host computer or other devices. Modules include:

 EIA-232 (RS-232C) – Point-to-point asynchronous serial

communications include Data Terminal Ready (DTR) support, Ready To Send (RTS) support, and radio power control.

 EIA-422/EIA-485 (RS-422/RS-485) – Point-to-point (EIA-422) or

multiple-point (EIA-485) asynchronous serial communications.

 Multi-Variable Sensor (MVS) – Interfaces with MVS Sensors (up to

two modules per ROC827).

 Dial-up modem – Communications over a telephone network (14.4K

V.42 bis with throughput up to 57.6K bps).

Hot-Swappable &

Hot-Pluggable

Modules—whether I/O or communication—easily install in the module slots. Modules are both “hot-swappable” (they can be removed and another module of the same kind installed while the ROC827 is powered) and “hot-pluggable” (they can be installed directly into unused module slots with the ROC827 is powered). Modules are also self-identifying, which means that the ROCLINK 800 Configuration software recognizes the module (although you may need to configure the module using the software). The modules have extensive short circuit, overvoltage protection, and are self-resetting after a fault clears.

1.2.1 Central Processor Unit (CPU)

The CPU contains the microprocessor, the firmware, connectors to the backplane, the three built-in communication ports (two with LEDs), a LED low power wakeup button, a RESET button, the application license key connectors, a STATUS LED indicating system integrity, and the main processor.

CPU components include:  32-bit microprocessor based on Motorola

Communications Controller (PowerQUICC



MPC862 Quad Integrated

™

) PowerPC processor.

 SRAM (Static Random Access Memory) with battery backup.  Flash ROM (Read-Only Memory).  SDRAM (Synchronous Dynamic Random Access Memory).

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 Diagnostic monitoring.  Real-Time Clock.  Automatic self-tests.  Power saving modes.  Local Operator Interface (LOI) EIA-232 (RS-232D) Local Port.  EIA-232 (RS-232C) serial Comm2 port.  Ethernet Comm1 port.

1.2.2 Processor and Memory

The ROC827 uses a 32-bit microprocessor with processor bus clock frequency at 50 MHz with a watchdog timer. The Motorola MPC862 Quad Integrated Communications Controller (PowerQUICC) PowerPC processor and the Real-Time Operating System (RTOS) provide both hardware and software memory protection.

1.2.3 Real-Time Clock (RTC)

ROC827 Instruction Manual

You can set the ROC827’s Real-Time Clock (RTC) for year, month, day, hour, minute, and second. The clock provides time stamping of the database values. The battery-backed clock firmware tracks the day of the week, corrects for leap year, and adjusts for daylight savings time (userselectable). The time chip automatically switches to backup power when the ROC827 loses primary input power.

The internal Sanyo 3-volt CR2430 lithium battery provides backup for the data and the Real-Time Clock when the main power is not connected. The battery has a one-year minimum backup life with the battery is installed, the jumper disengaged, and no power applied to the ROC827. The battery has a ten-year backup life with the backup battery installed and power applied to the ROC827 or when the battery is removed from the ROC827.

Note: If the Real-Time Clock does not keep the current time when you

remove power, replace the lithium battery.

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1.2.4 Diagnostic Monitoring

The ROC827 has diagnostic inputs incorporated into the circuitry for monitoring system integrity. Use ROCLINK 800 software to access the System Analog Inputs. Refer to Table 1-1.

System AI

Point Number

1 Battery Input Voltage 11.25 to 16 Volts dc 2 Charge in Voltage 0 to 18 Volts dc 3 Module Voltage 11.00 to 14.50 Volts dc 4 Not Used Not Used

ROC827 Instruction Manual

Table 1-1. System Analog Inputs

Function Normal Range

1.2.5 Options

5 On Board Temperature

–40 to 85C (–40 to 185F)

The ROC827 allows you to choose from a wide variety of options to suit many applications.

Optional communication modules include EIA-232 (RS-232) serial communications, EIA-422/485 (RS-422/485) serial communications, Multi-Variable Sensor (MVS), and dial-up modem communications (refer to Chapter 5, Communications).

The ROC827 can handle up to two MVS interface modules. Each module can provide power and communications for up to six MVS sensors, for a total of up to 12 MVS sensors per ROC827 (refer to Chapter 5, Communications).

Optional I/O modules include Analog Inputs (AI), Analog Outputs (AO), Discrete Inputs (DI), Discrete Outputs (DO), Discrete Output Relays (DOR), Pulse Inputs (PI), Resistance Temperature Detector (RTD) Inputs, Thermocouple (T/C) Inputs, and Highway Addressable Remote Transducers (HART) (refer to Chapter 4, Input/Output Modules).

The optional application license keys provide extended functionality, such as the use of the DS800 Development Suite Software (the IEC 61131-3 compliant programming environment) and various user programs, and enables embedded meter runs. For example, you need to install a license key with the proper license in the ROC827 to perform AGA calculations. Refer to Section 1.6, “DS800 Development Suite Software.”

The Local Operator Interface (LOI local port) communications terminal requires the installation of an LOI cable between the ROC827 and your PC. The LOI port uses an RJ-45 connector with a standard EIA-232 (RS-232D) pin out.

Issued Mar-06 General Information 1-7

1.3 FCC Information

This equipment complies with Part 68 of the FCC rules. Etched on the modem assembly is, among other information, the FCC certification number and Ringer Equivalence Number (REN) for this equipment. If requested, this information must be provided to the telephone company.

This module has an FCC-compliant telephone modular plug. The module is designed to be connected to the telephone network or premises’ wiring using a compatible modular jack that is Part 68-compliant.

The REN is used to determine the quantity of devices that may be connected to the telephone line. Excessive RENs on the telephone line may result in the devices not ringing in response to an incoming call. Typically, the sum of the RENs should not exceed five (5.0). Contact the local telephone company to determine the total number of devices that may be connected to a line (as determined by the total RENs).

If this equipment and its dial-up modem causes harm to the telephone network, the telephone company will notify you in advance that temporary discontinuance of service may be required. However, if advance notice is not practical, the telephone company will notify the customer as soon as possible. In addition, you will be advised of your right to file a complaint with the FCC if you believe it necessary.

ROC827 Instruction Manual

1.4 Firmware

The telephone company may make changes to its facilities, equipment, operations, or procedures that could affect the operation of the equipment. If this happens, the telephone company will provide advance notice so you can make the necessary modifications to maintain uninterrupted service.

If you experience trouble with this equipment or the dial-up modem, contact Emerson Process Management’s Flow Computer Division (at 641754-3923) for repair or warranty information. If the equipment harms the telephone network, the telephone company may request that you disconnect the equipment until the problem is resolved.

The firmware that resides in Flash Read-Only Memory (ROM) contains the operating system, ROC Plus communications protocol, and application software. The CPU module provides battery-backed Static Random Access Memory (SRAM) for saving configurations, storing events, alarms, and the historical logs.

The ROC800-Series Operating System firmware provides a complete operating system for the ROC827. The firmware in the ROC827 is fieldupgradeable using a serial connection or the Local Operator Interface (LOI) local port. For more information, refer to the ROCLINK 800 Configuration Software User Manual (Form A6121).

The firmware supports:

 Input/Output Database.

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ROC827 Instruction Manual

 Historical Database.  Event and Alarm Log Databases.  Applications (PID, AGA, FST, and such).  Measurement Station Support.  Determining Task Execution.  Real-Time Clock.  Establishing and Managing Communications.  Self-Test Capability.

The firmware makes extensive use of configuration parameters, which you configure using ROCLINK 800 software.

RTOS

TLP

The ROC800-Series firmware uses a pre-emptive, multi-tasking, message-based Real-Time Operating System (RTOS) with hardwaresupported memory protection. Tasks are assigned priorities and, at any given time, the operating system determines which task will run. For instance, if a lower priority task is executing and a higher priority task needs to run, the operating system suspends the lower priority task, allows the higher priority task to run to completion, then resumes the lower priority task’s execution. This is more efficient than a “time sliced” architecture type.

The ROC827 reads data from and writes data to data structures called “points.” A “point” is a ROC Plus Protocol term for a grouping of individual parameters (such as information about an I/O channel) or some other function (such as a flow calculation). Points are defined by a collection of parameters and have a numerical designation that defines the type of point (for example, point type 101 refers to a Discrete Input and point type 103 refers to an Analog Input).

The logical number indicates the physical location for the I/O or the logical instance for non-I/O points within the ROC827. Parameters are individual pieces of data that relate to the point type. For instance, the raw A/D value and the low scaling value are parameters associated with the Analog Input point type, 103. The point type attributes define the database point to be one of the possible types of points available to the system.

Together, these three components—the type (T), the logical (L), and the parameters (P)—can be used to identify specific pieces of data that reside in a ROC827’s data base. Collectively, this three-component address is often called a “TLP.”

I/O Database

The Input/Output database contains the input and output points the operating system firmware supports, including the System Analog Inputs, Multi-Variable Sensor (MVS) inputs, and Input/Output (I/O) modules. The firmware automatically determines the point type and point number location of each installed I/O module. It then assigns each input and output to a point in the database and includes userdefined configuration parameters for assigning values, statuses, or identifiers. The firmware scans each input, placing the values into the

Issued Mar-06 General Information 1-9

ROC827 Instruction Manual

respective database point. These values are available for display and historical archiving.

SRBX

Protocols

Spontaneous-Report-by-Exception (SRBX or RBX) communication allows the ROC827 to monitor for alarm conditions and, upon detecting an alarm, automatically reports the alarm to a host computer. Any kind of communications link—dial-up modem or serial line—can perform SRBX as long as the host is set up to receive field-initiated calls.

The firmware supports both the ROC Plus protocol and the Modbus master and slave protocol. ROC Plus protocol can support serial communications and radio or telephone modem communications to local or remote devices, such as a host computer. The firmware also supports the ROC Plus protocol over TCP/IP on the Ethernet port. The ROC Plus protocol is similar to the ROC 300/400/500 protocol, since it used many of the same opcodes. For more information, contact your local sales representative.

The ROC800-Series firmware also supports Modbus protocol as either master or slave device using Remote Terminal Unit (RTU) or American Standard Code for Information Interchange (ASCII) modes. This allows you to easily integrate the ROC827 into other systems. Extensions to the Modbus protocol allow the retrieval of history, event, and alarm data in Electronic Flow Metering (EFM) Measurement applications.

Security

Input Module

Addressing

Note: In Ethernet mode, the firmware support Modbus only in slave mode.

The ROCLINK 800 software also secures access to the ROC827. You can define and store a maximum of 16 case-sensitive user identifiers (User IDs). In order for the ROC827 to communicate, a case sensitive log-on ID supplied to the ROCLINK 800 software must match one of the IDs stored in the ROC827.

The operating system firmware supports the application-specific firmware supplied in the Flash ROM. The application firmware includes Proportional, Integral, and Derivative (PID) Control; FSTs; SpontaneousReport-By-Exception (SRBX) Communications Enhancement; optional American Gas Association (AGA) Flow calculations with station support; and optional IEC 61131-3 language programs (using DS800 Development Suite software). Applications reside, so you do not need to re-build and download the firmware for changes in calculation method.

The ROC800-Series firmware, by default, supports 16 addressable points per module slot. However, to accommodate all the ROC827’s expanded input capabilities (up to 27 module slots), you must set the firmware to support eight (8) addressable points per module slot. (Accomplish this using ROCLINK 800 and selecting ROC > Information. On the Device Information screen’s General tab, click the 8-Points Per Module radio button in the Logical Compatibility Mode frame.)

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ROC827 Instruction Manual

The difference between 16-point and 8-point addressing becomes critical when you have a host device reading data from specific TLPs. For example, under 16-point addressing, channel 2 for a DI module in slot 2 is referenced by TLP 101,33,3. Under 8-point addressing, channel 2 for a DI module in slot 2 is referenced by TLP 101,17,23. Table 1-2 illustrates the difference between 8-point and 16-point addressing.

Table 1-2. 16-Point vs. 8-Point Addressing

Slot Number Logicals (16 pt) Logicals (8 pt)

0 0–15 0–7 1 16–31 8–15 2 32–47 16–23 3 48–63 24–31 4 64–79 32–39 5 80–95 40–47 6 96–111 48–55 7 112–127 56–63 8 128–143 64–71

9 144–159 72–79 10 N/A 80–87 11 N/A 88–95 12 N/A 96–103 13 N/A 104–111 14 N/A 112–119 15 N/A 120–127 16 N/A 128–135 17 N/A 136–143 18 N/A 144–151 19 N/A 152–159 20 N/A 160–167 21 N/A 168–175 22 N/A 176–183 23 N/A 184–191 24 N/A 192–199 25 N/A 200–207 26 N/A 208–215 27 N/A 216–223

Note: 16-point addressing is the default for the ROC800-Series firmware.

To maximize the expanded input capabilities of the ROC827, you must use ROCKLINK 800 to modify the firmware addressing to use 8-points per module.

1.4.1 Historical Database and Event & Alarm Log

The historical database provides archiving of measured and calculated values for either on-demand viewing or saving to a file. It provides an historical record in accordance with API Chapter 21.1. You can configure each of up to 200 points in the historical database to archive values under various schemes, such as averaging or accumulating, as appropriate for the type of database point.

Issued Mar-06 General Information 1-11

The historical database is maintained in 11 segments. You can configure each segment in the database to archive selected points at specified time intervals. The segments can continuously archive or can be turned on and off.

You can distribute history points among history segments 1 through 10 and the general history segment. For each history segment, you can configure the number of periodic history values archived, the frequency of archiving periodic values, the number of daily values archived, and the contract hour. The number of minute values is fixed at 60. The 200 points provide a total of over 197,000 entries (equal to more than 35 days of 24hour data for 200 points).

The Event Log records the last 450 parameter changes, power on and off cycles, calibration information, and other system events. The event is recorded along with a date and time stamp. The Alarm Log records the last 450 configured occurrences of alarms (set and clear). You can view the logs, save them to a disk file, or print them using ROCLINK 800 software.

1.4.2 Meter Runs and Stations

ROC827 Instruction Manual

You can group similarly configured meter runs into stations, which provide great benefits during configuration and reporting. You can also configure each meter run, which eliminates redundant meter run data within a station and enables faster data processing.

You can group meter runs among the maximum of twelve stations in any combination. Meter runs belong in the same station when they have the same gas composition data and calculation methods. Stations allow you to:

 Set contract hours differently for each station.  Designate several individual meter runs as part of a station.  Configure one to twelve meter runs for each station.

1.4.3 Flow Calculations

Gas and liquid calculation methods include:  AGA and API Chapter 21 compliant for AGA linear and differential

meter types.

 AGA 3 – Orifice Plates for gas.  AGA 7 – Turbine Meters (ISO 9951) for gas.  AGA 8 – Compressibility for Detailed (ISO 12213-2), Gross I (ISO

12213-3), and Gross II for gas.

 ISO 5167 – Orifice Plates for liquid.  API 12 – Turbine Meters for liquid.

ROC827 firmware completes full calculations every second on all configured runs (up to 12) for AGA 3, AGA 7, AGA 8, ISO 5167, and ISO 9951.

Issued Mar-06 General Information 1-12

AGA 3 calculations conform to the methods described in American Gas Association Report No. 3, Orifice Metering of Natural Gas and Other Related Hydrocarbon Fluids. Based on the second and third editions, the calculation method is 1992 AGA 3.

The AGA 7 calculations conform to methods described in American Gas Association Report No. 7, Measurement of Gas by Turbine Meters, and use the AGA 8 method for determining the compressibility factor.

The AGA 8 method calculates the compressibility factor based on the physical chemistry of the component gasses at specified temperatures and pressures.

The firmware supports liquid calculation methods ISO 5167 and API 12. Factors for API 12 correction must be supplied through a Function Sequence Table (FST) or user program. For more information, refer either to the Function Sequence Table (FST) User Manual (Form A4625) or the ROCLINK 800 Configuration Software User Manual (Form A6121).

1.4.4 Automatic Self Tests

ROC827 Instruction Manual

The operating system firmware supports diagnostic tests on the ROC827 hardware, such as RAM integrity, Real-Time Clock operation, input power voltage, board temperature, and watchdog timer.

The ROC827 periodically performs the following self-tests:  Voltage tests (battery low and battery high) ensure the ROC827 has

enough power to run while not allowing the battery to be overcharged. The ROC827 operates with 12 Volts dc (nominal) power. The LEDs become active when input power with the proper polarity and startup voltage (9.00 to 11.25 Volts dc) is applied to the BAT+ / BAT– connectors. Refer to Table 1-1.

 The CPU controls the software “watchdog.” This watchdog checks the

software for validity every 2.7 seconds. If necessary, the processor automatically resets.

 The ROC827 monitors Multi-Variable Sensor(s), if applicable, for

accurate and continuous operation.

 A memory validity self-test is performed to ensure the integrity of

memory.

1.4.5 Low Power Modes

The ROC827 uses low power operation under predetermined conditions and supports two low power modes, Standby and Sleep.

 Standby

The ROC827 uses this mode during periods of inactivity. When the operating system cannot find a task to run, the ROC827 enters Standby mode. This mode keeps all peripherals running and is transparent to

Issued Mar-06 General Information 1-13

the user. The ROC827 wakes from Standby mode when it needs to perform a task.

 Sleep

The ROC827 uses this mode if it detects a low battery voltage. The System AI Battery Point Number 1 measures the battery voltage and compares it to the LoLo Alarm limit associated with this point . (The default value for the LoLo Alarm limit is 10.6 Volts dc.) When in Sleep mode, AUX

is turned off. For information on configuring

alarms and System AI points, refer to the ROCLINK 800 Configuration Software User Manual (Form A6121).

Note: Sleep mode applies only to ROC827s using the 12 V dc Power

Input module (PM-12).

1.4.6 Proportional, Integral, and Derivative (PID)

The PID Control applications firmware provides Proportional, Integral, and Derivative (PID) gain control for the ROC827 and enables the stable operation of 16 PID loops that employ a regulating device, such as a control valve.

ROC827 Instruction Manual

The firmware sets up an independent PID algorithm (loop) in the ROC827. The PID loop has its own user-defined input, output, and override capability.

The typical use for PID control is to maintain a Process Variable at a setpoint. If you configure PID override control, the primary loop is normally in control of the regulating device. When the change in output for the primary loop becomes less or greater (user-definable) than the change in output calculated for the secondary (override) loop, the override loop takes control of the regulating device. When the switchover conditions are no longer met, the primary loop regains control of the device. Parameters are also available to force the PID into either loop or force it to stay in one loop.

1.4.7 Function Sequence Table (FST)

The Function Sequence Table (FST) applications firmware gives analog and discrete sequencing control capability to the ROC827. This programmable control is implemented in an FST, which defines the actions the ROC827 performs using a series of functions. To develop FSTs, you use the FST Editor in the ROCLINK 800 Configuration software.

The function is the basic building block of an FST. You organize functions in a sequence of steps to form a control algorithm. Each function step can consist of a label, a command, and associated arguments. Use labels to identify functions and allow branching to specific steps within an FST. You select commands from a library of mathematical, logical, and other command options. Command names consist of up to three characters

Issued Mar-06 General Information 1-14

or symbols. Finally, arguments provide access to process I/O points and retrieve real-time values. A function may have zero, one, or two arguments.

The FST Editor provides a workspace into which you can enter—for each FST—either a maximum of 500 lines or a maximum of 3000 bytes. Since the total amount of memory each FST uses is based on the number of steps and the commands used in each step and since different commands consume different amounts of memory, estimating the memory usage of an FST is difficult. Only after compiling an individual FST can you conclusively know its memory usage.

For further information on FSTs, refer to the ROCLINK 800 Configuration

Software User Manual (Form A6121) or the Function Sequence Table (FST) User Manual (Form A4625).

1.5 ROCLINK 800 Configuration Software

ROC827 Instruction Manual

ROCLINK 800 Configuration software (“ROCLINK 800”) is a

Microsoft

Windows-based program that runs on a personal computer

and enables you to monitor, configure, and calibrate the ROC827. ROCLINK 800 has a standard, easy-to-use Windows interface. Tree-based

navigation makes accessing features quick and easy. Many of the configuration screens, such as stations, meters, I/O, and PIDs,

are available while ROCLINK 800 is off-line. This enables you to configure the system while either on-line or off-line with the ROC827.

The Local Operator Interface (LOI local port) provides a direct link between the ROC827 unit and a personal computer (PC). The LOI port uses an RJ-45 connector with standard EIA-232 (RS-232D) pinout. With a personal computer running ROCLINK 800, you can locally configure the ROC827, extract data, and monitor its operation.

Remote configuration is possible from a host computer using a serial or dial-up modem communications line. Configurations can be duplicated and saved to a disk. In addition to creating a backup, this feature is useful when you are similarly configuring multiple ROC827s for the first time, or when you need to make configuration changes off-line. Once you create a backup configuration file, you can load it into a ROC827 by using the Download function.

Access to the ROC827 is restricted to authorized users with correct User ID and password.

You can build custom displays for the ROC827 that combine both graphic and dynamic data elements. The displays can monitor the operation of the ROC827 either locally or remotely.

You can archive historical values for any numeric parameter in the ROC827. For each parameter configured for historical archiving, the

Issued Mar-06 General Information 1-15

ROC827 Instruction Manual

system keeps time-stamped minute, periodic, and daily data values as well as yesterday’s and today’s daily minimum and maximum values.

You can collect history values from the ROC827 using ROCLINK 800 or another third-party host system. You can view history directly from the ROC827 or from a previously saved disk file. For each history segment, you can configure the number of periodic history values archived, the frequency of archiving the periodic values, the number of daily values archived, and the contract hour.

ROCLINK 800 can create an EFM (Electronic Flow Measurement) report file that contains all the configuration, alarms, events, periodic and daily history logs, and other history logs associated with the stations and meter runs in the ROC827. This file then becomes the custody transfer audit trail.

The SRBX (Spontaneous-Report-By-Exception) alarming feature is available for the host communication ports (Local and dial-up modem ports). SRBX allows the ROC827 to contact the host to report an alarm condition.

Use ROCLINK 800 to:  Configure and view Input/Output (I/O) points, flow calculations, meter

runs, PID control loops, system parameters, and power management features.

 Retrieve, save, and report historical data.  Retrieve, save, and report events and alarms.  Perform five-point calibration on Analog Inputs and Multi-Variable

Sensor Inputs.

 Perform three-point calibration on RTD Inputs.  Implement user security.  Create, save, and edit graphical displays.  Create, save, edit, and debug Function Sequence Tables (FSTs) of up

to 500 lines each.

 Set up communication parameters for direct connection, telephone

modems, and other communications methods.

 Configure Modbus parameters.  Set up radio power control.  Update the firmware.

1.6 DS800 Development Suite Software

DS800 Development Suite software allows you to program in any one of the five IEC 61131-3 languages. You can download DS800 applications to a ROC827 over the Ethernet port, independently of the ROCLINK 800 software.

Issued Mar-06 General Information 1-16

ROC827 Instruction Manual

DS800 Development Suite software allows programming in all five of the IEC 61131-3 languages:

 Ladder Logic Diagrams (LD).  Sequential Function Chart (SFC).  Function Block Diagram (FBD).  Structured Text (ST).  Instruction List (IL).

A Flow Chart language provides a sixth programming language. With these six languages, FSTs, and built-in functionality, you can configure and program the ROC827 in an environment in which you are comfortable.

You can download and implement programs developed in the DS800 Development Suite software in the ROC827 in addition to—or as an alternative to—FST programs. DS800 software has definite benefits for programmers who prefer to use the IEC 61131-3 languages, who desire to multi-drop units in a distributed architecture, or who desire enhanced program diagnostics capabilities.

Additional DS800 Development Suite software features include:  Cross-reference (bindings) between variables in separate ROC827

units.

 Variable Dictionary.  Off-line simulation for diagnostics and testing.  On-line modification of programs.  On-line debugging of programs.  Locking and forcing of variables.  User developed functions and function blocks.  User defined templates.  Creation and support of user defined libraries.

1.7 Expanded Backplane

The expanded backplane is a key component to the ability of the ROC827 to expand its I/O capabilities to meet your needs. The ROC827 base unit can accommodate up to four additional expanded backplanes, which easily snap together. This increases the total number of available I/O slots to 27. Refer to Chapter 2, Installation and Use, for instructions on adding backplanes to the ROC827 base unit. Refer to Chapter 3, Power Connections, to assess the power requirements for any particular I/O configuration.

Issued Mar-06 General Information 1-17

1.8 Related Specification Sheets

For technical details on the ROC827 and the ROC800-Series expanded backplane, refer to the specification sheet 6:ROC827. The most current version of this specification sheet is available at

www.EmersonProcess.com/flow

Note: Since the expanded backplanes accommodate the same I/O modules

as the ROC827 base unit, the firmware specifications for the expanded backplane are identical to those for the ROC827. However, because of the opportunity for different configurations, power requirements differ. Refer to Chapter 3, Power Connections, for specific information.

ROC827 Instruction Manual

Issued Mar-06 General Information 1-18

Chapter 2 – Installation and Use

This chapter describes the ROC827 housing (case), its backplane (electronic connection board at the back of the housing), the ROC800Series CPU (central processing unit), and the ROC800-Series Expanded Backplane (EXP). This chapter provides a description and specifications of these hardware items and explains installation and startup of the ROC827.

In This Chapter

2.1 Installation Requirements........................................................................2-1

2.1.1 Environmental Requirements ........................................................2-2

2.1.2 Site Requirements .........................................................................2-2

2.1.3 Compliance with Hazardous Area Standards................................2-3

2.1.4 Power Installation Requirements...................................................2-4

2.1.5 Grounding Installation Requirements ............................................2-4

2.1.6 I/O Wiring Requirements................................................................2-5

2.2 Required Tools ........................................................................................2-5

2.3 Housing....................................................................................................2-5

2.3.1 Removing and Replacing End Caps..............................................2-6

2.3.2 Removing and Installing Wire Channel Covers.............................2-6

2.3.3 Removing and Installing Module Covers.......................................2-7

2.4 Mounting the ROC827 on a DIN Rail ......................................................2-7

2.4.1 Installing the DIN Rail ....................................................................2-9

2.4.2 Securing the ROC827 on the DIN Rail..........................................2-9

2.4.3 Removing the ROC827 from the DIN Rail...................................2-10

2.5 ROC800-Series Expanded Backplane (EXP)........................................2-10

2.5.1 Attaching an Expandable Backplane...........................................2-11

2.5.2 Removing an Expandable Backplane..........................................2-12

2.6 Central Processor Unit (CPU) ...............................................................2-13

2.6.1 Removing the CPU Module .........................................................2-16

2.6.2 Installing the CPU Module ...........................................................2-16

2.7 License Keys .........................................................................................2-17

2.7.1 Installing a License Key...............................................................2-18

2.7.2 Removing a License Key.............................................................2-19

2.8 Startup and Operation ...........................................................................2-19

2.8.1 Startup..........................................................................................2-20

2.8.2 Operation.....................................................................................2-20

ROC827 Instruction Manual

2.1 Installation Requirements

The ROC827’s design makes it highly adaptable to a wide variety of installations. Consequently, this manual cannot cover all possible installation scenarios. Contact your local sales representative if you require information concerning a specific installation not described in this manual.

Planning is essential to a good installation. Because installation requirements depend on many factors (such as the application, location,

Issued Mar-06 Installation and Use 2-1

ground conditions, climate, and accessibility), this document only provides generalized guidelines.

2.1.1 Environmental Requirements

Always install the ROC827 in a user-supplied enclosure, as the ROC827 requires protection from direct exposure to rain, snow, ice, blowing dust or debris, and corrosive atmospheres. If you install the ROC827 outside a building, it must be placed in a National Electrical Manufacturer’s Association (NEMA) 3 or higher rated enclosure to ensure the necessary level of protection.

Note: In salt spray environments, it is especially important to ensure that

the enclosure—including all entry and exit points—is sealed properly. The ROC827 operates over a wide range of temperatures. However, in

extreme climates it may be necessary to provide temperature-controlling devices to maintain stable operating conditions. In extremely hot climates, a filtered ventilation system or air conditioning may be required. In extremely cold climates, it may be necessary to provide a thermostatically controlled heater in the same enclosure as the ROC827. To maintain a non-condensing atmosphere inside the ROC827 enclosure in areas of high humidity, it may be necessary to add heat or dehumidification.

ROC827 Instruction Manual

2.1.2 Site Requirements

When locating the ROC827 on the site, careful consideration can help reduce future operational problems. Consider the following items when choosing a location:

 Local, state, and federal codes often place restrictions on locations and

dictate site requirements. Examples of these restrictions are fall distance from a meter run, distance from pipe flanges, and hazardous area classifications. Ensure that all code requirements are met.

 Choose a location for the ROC827 to minimize the length of signal

and power wiring.

 Locate ROC827s equipped for radio communications so the antenna

has an unobstructed signal path. Antennas should not be aimed into storage tanks, buildings, or other tall structures. If possible, antennas should be located at the highest point on the site. Overhead clearance should be sufficient to allow the antenna to be raised to a height of at least twenty feet.

 To minimize interference with radio communications, choose a

location for the ROC827 away from electrical noise sources, such as engines, large electric motors, and utility line transformers.

Issued Mar-06 Installation and Use 2-2

ROC827 Instruction Manual

 Choose a location for the ROC827 away from heavy traffic areas to

reduce the risk of being damaged by vehicles. However, provide adequate vehicle access to aid monitoring and maintenance.

 The site must comply with class limits of Part 15 of the FCC rules.

Operation is subject to the following two conditions: (1) The device may not cause harmful interference, and (2) the device must accept any interference received, including interference that may cause undesired operation.

2.1.3 Compliance with Hazardous Area Standards

The ROC hazardous location approval is for Class I, Division 2, Groups A, B, C, and D. The Class, Division, and Group terms include:

 Class defines the general nature of the hazardous material in the

surrounding atmosphere. Class I is for locations where flammable gases or vapors may be present in the air in quantities sufficient to produce explosive or ignitable mixtures.

 Division defines the probability of hazardous material being present in

an ignitable concentration in the surrounding atmosphere. Division 2 locations are locations that are presumed to be hazardous only in an abnormal situation.

Caution

 Group defines the hazardous material in the surrounding atmosphere.

Groups A to D are:

o Group A: Atmosphere containing acetylene. o Group B: Atmosphere containing hydrogen, gases, or vapors of

equivalent nature.

o Group C: Atmosphere containing ethylene, gases, or vapors of

equivalent nature.

o Group D: Atmosphere containing propane, gases, or vapors of

equivalent nature.

For the ROC827 to be approved for hazardous locations, it must be installed in accordance with the National Electrical Code (NEC) guidelines or other applicable codes.

When working on units located in a hazardous area (where explosive gases may be present), make sure the area is in a non-hazardous state before performing procedures. Performing these procedures in a hazardous area could result in personal injury or property damage.

Issued Mar-06 Installation and Use 2-3

2.1.4 Power Installation Requirements

Be sure to route power away from hazardous areas, as well as sensitive monitoring and radio equipment. Local and company codes generally provide guidelines for installations. Adhere rigorously to all local and National Electrical Code (NEC) requirements.

The removable terminal blocks accept 12 American Wire Gauge (AWG) or smaller wiring.

Although the ROC827 can operate on different DC voltages based on the installed Power Input module, it is good practice when using a batterybacked system to install a low-voltage cutoff device to help protect batteries and other devices the ROC827 does not power. Similarly, when the ROC827 uses a PM-24 Power Input module with a 24 V dc batterybacked system, it is a good practice to install an appropriate low voltage cutoff device to protect the battery back-up.

2.1.5 Grounding Installation Requirements

ROC827 Instruction Manual

If your company has no specific grounding requirements, install the ROC827 as a floating system (unconnected to ground). Otherwise, follow your company’s specific grounding practices. However, if you are making a connection between a grounded device and the ROC827 EIA-232 (RS-

232) port, ground the ROC827 Power Input module either by connecting the PM-12’s BAT– to ground or by connecting either of the PM-24’s negative Power Inputs to ground.

The National Electrical Code (NEC) governs the ground wiring requirements. When the equipment uses a DC voltage source, the grounding system must terminate at the service disconnect. All equipment grounding conductors must provide an uninterrupted electrical path to the service disconnect. This includes wire or conduit carrying the power supply conductors.

 The National Electrical Code Article 250-83 (1993), paragraph c,

defines the material and installation requirements for grounding electrodes.

 The National Electrical Code Article 250-91 (1993), paragraph a,

defines the material requirements for grounding electrode conductors.

 The National Electrical Code Article 250-92 (1993), paragraph a,

provides installation requirements for grounding electrode conductors.

 The National Electrical Code Article 250-95 (1993) defines the size

requirements for equipment grounding conductors.

Improper grounding or poor grounding practice can often cause problems, such as the introduction of ground loops into your system. Proper grounding of the ROC827 helps to reduce the effects of electrical noise on the ROC827’s operation and protects against lightning.

Issued Mar-06 Installation and Use 2-4

Install a surge protection device at the service disconnect on DC voltage source systems to protect against lightning and power surges for the installed equipment. All earth grounds must have an earth to ground rod or grid impedance of 25 ohms or less as measured with a ground system tester. You may also consider a telephone surge protector for the dial-up modem communications module.

A pipeline with cathodic protection is not a good ground. Do not tie common to the cathodic part of the pipeline.

When connecting shielded cable, be sure to tie the shielded cable to earth ground at the end of the cable attached to the ROC827 only. Leave the other end of the shielded cable open to avoid ground loops.

2.1.6 I/O Wiring Requirements

I/O wiring requirements are site- and application-dependent. Local, state, and NEC requirements determine the I/O wiring installation methods. Direct buried cable, conduit and cable, or overhead cable are all options for I/O wiring installations.

ROC827 Instruction Manual

Shielded, twisted-pair cable is recommended for I/O signal wiring. The twisted-pair minimizes signal errors caused by Electro-Magnetic Interference (EMI), Radio Frequency Interference (RFI), and transients. Use insulated, shielded, twisted-pair wiring when using MVS signal lines. The removable terminal blocks accept 12 AWG or smaller wire.

2.2 Required Tools

Use the following tools to perform installation and maintenance procedures on the ROC827. For tools required for installation or maintenance of accessories, refer to the ROC/FloBoss Accessories Instruction Manual (Form A4637).

 Philips screwdriver, size 0.  Flat blade screwdriver, size 2.5 mm (0.1 inch).  Flat blade screwdriver, large, or other prying instrument.

2.3 Housing

The housing case is made of a patented Acrylonitrile Butadiene Styrene (ABS) plastic (U.S. Patent 6,771,513) and the wire channel covers are made of polypropylene plastic.

Issued Mar-06 Installation and Use 2-5

2.3.1 Removing and Replacing End Caps

Normal use and maintenance of the ROC827 does not typically require you to remove the end caps on the housing. Follow these procedures in case removal is necessary.

To remove the end caps:

1. Place the tip of a flat-blade screwdriver into the top pry hole of the end

cap and loosen the end cap by pulling the handle of the screwdriver away from the backplane.

Note: The pry holes are located on the sides of the end caps.

2. Place the tip of a flat-blade screwdriver into the bottom pry hole of the

end cap and loosen the end cap by pulling the handle of the screwdriver away from the backplane.

3. Pivot the front end cap away from the back edge of the housing.

To replace the end caps:

ROC827 Instruction Manual

1. Align the back edge of the end cap on the housing.

2. Rotate the end cap towards the housing and snap the end cap into

place.

2.3.2 Removing and Installing Wire Channel Covers

Install the wire channel covers over the wiring channels once the wiring of the terminal blocks is complete. Wire channel covers are located on the front of the ROC827 housing.

To remove a wire channel cover:

1. Grasp the wire channel cover at both the top and bottom.

2. Start at the top or bottom and pull the wire channel cover out of the

wire channel.

To replace a wire channel cover:

1. Align the wire channel cover over the wire channel, allowing

unobstructed wire access.

2. Press the wire channel cover into place until it snaps. Note: The tabs on the left side of the wire channel cover should rest in the

slots on the left edge of the channel.

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2.3.3 Removing and Installing Module Covers

Before you insert an I/O or communications module, remove the module cover over the empty module slots in which you intend to install the modules. Although you are not required to remove the power to the ROC827 to perform this procedure, caution is always advisable when working with a powered ROC827.

Caution

To avoid circuit damage when working inside the unit, use appropriate electrostatic discharge precautions (such as wearing a grounded wrist strap).

To remove a module cover:

1. Remove the wire channel cover.

ROC827 Instruction Manual

2. Unscrew the two captive screws on the face of the cover.

3. Using the tab at the left side of the removable terminal block, pull the

module cover straight out from the ROC827 housing.

Note: If you remove a module for an extended period, install a module

cover plate over the empty module slot to keep dust and other matter from getting into the ROC827.

To install a module cover:

1. Place the module cover over the module slot.

2. Screw the two captive screws on the module cover plate.

3. Replace the wire channel cover.

2.4 Mounting the ROC827 on a DIN Rail

When choosing an installation site, be sure to check all clearances. Provide adequate clearance for wiring and service. The ROC827 mounts on Type 35 DIN rails and requires two strips of DIN rail. Refer to Figures 2-1, 2-2, and 2-3.

Note: English measurement units (inches) appear in brackets in the

following figures.

Issued Mar-06 Installation and Use 2-7

ROC827 Instruction Manual

Figure 2-1. Side View of the ROC827

Figure 2-2. Bottom View of the ROC827

Note: The distance from the mounting panel to the front of the ROC827 is

174mm (6.85”). If you mount the ROC827 inside an enclosure and want to connect a cable to the LOI or Ethernet port, ensure adequate clearance for the cable and the enclosure door. For example, a molded RJ-45 CAT 5 cable can increase the clearance requirement for the enclosure by 25mm (1”).

Issued Mar-06 Installation and Use 2-8

DIN Rail Catch

ROC827 Instruction Manual

DIN Rail Mount

Figure 2-3. Back View of the ROC827

2.4.1 Installing the DIN Rail

To install the ROC827 using the 35 x 7.5 mm DIN rails:

1. Mount the lower DIN rail onto the enclosure panel.

2. Snap the upper DIN rail into the ROC827 upper DIN rail mounting

blocks.

3. Place the ROC827 onto the lower rail that is mounted to the plane and

ensure that the ROC827 (with the second strip of DIN rail still in its upper mounting blocks) is seated against the panel.

4. Fasten the upper strip of DIN rail to the panel. Note: Following this procedure (which uses the ROC827 to provide the

correct DIN rail spacing) ensures that the ROC827 is held securely in place.

2.4.2 Securing the ROC827 on the DIN Rail

When placed correctly, the DIN rail catches (see Figure 2-3) secure the ROC to the DIN rail. Place the catches according to the following configuration:

 ROC827: One catch.

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 ROC827 and one EXP: Place catches on ROC827 and EXP.  ROC827 and two EXPs: Place catches on ROC827 and second EXP.  ROC827 and three EXPs: Place catches on ROC827 and third EXP.  ROC827 and four EXPs: Place catches on ROC827 and second and

fourth EXP.

2.4.3 Removing the ROC827 from the DIN Rail

To remove the ROC827 from DIN rails, gently lever the DIN rail catches (located on the top of the housing) up approximately 3-4mm (1/8”). Then tilt the top of the ROC827 away from the DIN rail.

2.5 ROC800-Series Expanded Backplane (EXP)

The expanded backplane has connectors for the central processing unit (CPU), the power input module, and all the I/O and communication modules. Once a module is completely inserted into the module slot, the connector on the module fits into one of the connectors on the backplane. The backplane does not require any wiring, so no jumpers are associated with the backplane.

ROC827 Instruction Manual

Figure 2-4. ROC827 and Expanded Backplane

Issued Mar-06 Installation and Use 2-10

Removing the backplane from the housing is not recommended, as there are no field serviceable parts. If the backplane requires maintenance, please contact your local sales representative.

2.5.1 Attaching an Expandable Backplane

To attach an EXP to an existing ROC827 base unit or to another EXP:

1. Remove the right-hand end cap from the ROC827 as described in

Section 2.3.1, “Removing and Replacing End Caps.”

Note: The EXP may not have attached end caps. If it does, remove the

left-hand end cap.

2. Remove the wire channel covers from the ROC827 as described in

Section 2.3.2, “Removing and Installing Wire Channel Covers.”

3. Align and gently press together the front right edge of the EXP against

the front left edge of the ROC827. This aligns the power connector on the EXP’s backplane with the socket on the ROC827’s backplane (see Figure 2-5).

ROC827 Instruction Manual

Figure 2-5. Power connector on the EXP Backplane

4. Pivot the back edges of the ROC827 and the EXP toward each other

until they click together.

Note: The plastic locking clips at the back of the EXP click when the

two units securely fasten together.

5. Attach an end cap to the right side of the EXP (if it does not have one).

Do not replace the wire channel covers until you finish installing and wiring the modules in the EXP.

Note: Adding an EXP–and the modules it will hold–may require you to

adjust your ROC827’s power consumption requirements. Refer to Section

3.2, “Determining Power Consumption.”

Issued Mar-06 Installation and Use 2-11

2.5.2 Removing an Expandable Backplane

Note: Before you remove an EXP, you must power down the ROC827,

disconnect all wiring from all modules, and remove the entire unit from the DIN rail. Once the entire ROC827 is free of the DIN rail, you can detach an individual EXP.

To remove an EXP from an existing ROC827 base unit:

1. Remove the right-hand end cap from the EXP as described in Section

2.3.1, “Removing and Replacing End Caps.”

2. Remove the wire channel covers on either side of the EXP you want to

detach, as described in Section 2.3.2, “Removing and Installing Wire Channel Covers.”

3. Turn the ROC827 around so that the back of the unit faces you (as

shown in Figure 2-6).

Note: It may be useful to place the ROC827 face-down on a flat

surface with the EXP you want to detach hanging free of the surface’s edge.

ROC827 Instruction Manual

Locking clips and tabs

Figure 2-6. Plastic Snaps on the Back of the EXP

Issued Mar-06 Installation and Use 2-12

ROC827 Instruction Manual

4. Using a flat-bladed screwdriver, gently pry the plastic locking clips at

the upper and lower back edge of the EXP housing away from their securing tabs.

Note: Applying too much pressure breaks the plastic hooks.

5. Once you free the plastic locking clips from their securing tabs, gently

pivot the back of the EXP away from the ROC827.

Note: The EXP detaches quickly. Hold it securely to prevent it from

falling.

6. Place the detached EXP in a secure location.

7. Replace the right-hand end cap.

8. Replace the ROC827 on the DIN rail.

9. Reattach all wiring.

10. Replace the wire channel covers.

2.6 Central Processor Unit (CPU)

The ROC827 uses a standard ROC800-Series central processing unit (CPU) containing the microprocessor, the firmware, connectors to the backplane, the three built-in communication ports (two with LEDs), a LED low power wakeup button, a RESET button, the application License Key connectors, a STATUS LED indicating system integrity, and the main processor (refer to Figures 2-5 and 2-6 and Tables 2-1 and 2-2).

The 32-bit microprocessor is based on a Motorola MPC862 Quad Integrated Communications Controller (PowerQUICC) PowerPC processor running at 50 MHz.

The internal Sanyo 3-volt CR2430 lithium backup battery provides backup of the data and the Real-Time Clock when the main power is not connected.

Issued Mar-06 Installation and Use 2-13

LOI – EIA-232 (RS-232D)x

STATUS LED

LICENSE KEYS x

ETHERNET

EIA-232 (RS-232C)

ROC827 Instruction Manual

Securing Screw

LED Button

RESET Button

Securing Screw

Battery

LED Button

Boot ROM

License Key (at P4)

License Key (at P6)

RESET Button

Figure 2-6. CPU Front View

Figure 2-7. CPU Connectors

Issued Mar-06 Installation and Use 2-14

ROC827 Instruction Manual

Table 2-1. CPU Connector Locations

CPU Number Definitions

J4 Not Used P2 LOI Port RJ-45 P3 Ethernet RJ-45 P4 License Key Termin al P6 License Key Termin al

SW1 LED Button SW2 RESET Button

The CPU contains a microprocessor supervisory circuit. This device monitors the battery voltage, resets the processor, and disables the SRAM chip if the voltage goes out of tolerance. The CPU has an internal Analog to Digital Converter (A/D). The A/D monitors the supply voltage and board temperature (refer to “Automatic Self-Tests” in Chapter 1, General

Information).

The CPU has two buttons, LED and RESET (see Figures 2-6 or 2-7):  RESET: Use this button to reset the ROC827 to system defaults (refer

to “Preserving Configuration and Log Data” in Chapter 6, Troubleshooting).

Note: First, remove power from the ROC827. Then press and hold in

the RESET button while you re-apply power to the ROC827. Finally, release the RESET button.

 LED: Press to turn on the LEDs on the CPU module, I/O modules,

and communication modules when the ROC827 has timed out.

The STATUS LED helps to indicate the integrity of the ROC827 (refer to Table 2-2).

Table 2-2. STATUS LED Functions

Status LED Color Definitions Solution

Continually Lit

Flashing Green  Firmware invalid.  Update firmware. Flashing Flashing Green to Red  Firmware update is flashing image.  Do not restart the ROC827.

Green  ROC827 functioning normally.  N/A

 Low Battery Voltage alert.  Charge battery.

Red

Green-Green to Red-Red

 System AI (Point number 1) LoLo

Alarm.

 Firmware update in

decompression.

 Apply DC voltage source.

 Do not restart the ROC827.

To save power, you can enable or disable the LEDs on the ROC827 (with the exception of the LED on the power module). Using the ROCLINK 800 software, you can define how long the LEDs remains on after you press the LED button on the CPU module. For instance, with the default setting of five minutes, all LEDs turn off after five minutes. If you press the LED

Issued Mar-06 Installation and Use 2-15

button, LEDs light and stay lit again for five minutes. By entering a 0 (zero) setting, the LED always stays lit.

2.6.1 Removing the CPU Module

To remove the CPU module:

Caution

Failure to exercise proper electrostatic discharge precautions (such as wearing a grounded wrist strap) may reset the processor or damage electronic components, resulting in interrupted operations.

1. Perform the backup procedure described in “Preserving Configuration

and Log Data” in Chapter 6, Troubleshooting.

2. Remove power from the ROC827.

3. Remove the wire channel cover.

ROC827 Instruction Manual

4. Unscrew the two small screws on the front of the CPU module and

remove the faceplate.

5. Place a small screwdriver under the ejector clip at the top or bottom of

the CPU module and lightly pry the CPU module out of its socket. You may find it easiest to carefully pry on the top ejector clip a little, then carefully pry the bottom ejector (refer toFigure2-5). You will feel and hear the CPU as it detaches from the backplane.

6. Remove the CPU module carefully. Do not scrape either side of the

module against the ROC827. Make sure not to pull on any cables attached to the CPU module.

2.6.2 Installing the CPU Module

To install the CPU module:

Caution

Failure to exercise proper electrostatic discharge precautions (such as wearing a grounded wrist strap) may reset the processor or damage electronic components, resulting in interrupted operations.

1. Slide the CPU module into the slot.

2. Press the CPU firmly into the slot, ensuring the ejector clips rest on the

module rail guides. The connectors at the back of the CPU module fit securely into the connectors on the backplane.

3. Place the CPU faceplate on the CPU.

Issued Mar-06 Installation and Use 2-16

2.7 License Keys

ROC827 Instruction Manual

4. Tighten the two screws on the faceplate of the CPU module firmly (see

Figure 2-5).

5. Replace the wire channel cover.

6. Review “Restarting the ROC827” in Chapter 6, Troubleshooting.

7. Return power to the ROC827 unit.

License keys with valid license codes grant access to applications or, in some cases, allow optional firmware functionality to execute. In some situations, a license key may also be required before you can run the application. Examples of licensed applications include DS800 Development Suite software, meter run calculations, and various user programs. You can then configure these applications using ROCLINK 800 or the DS800 Development Suite software.

The term “license key” refers to the physical piece of hardware (refer to Figure 2-6) that can contain up to seven different licenses. Each ROC827 can have none, one, or two installed license keys. If you remove a license key after enabling an application, the firmware disables the task from running. This prevents unauthorized execution of protected applications in a ROC827.

Figure 2-8. License Key

Issued Mar-06 Installation and Use 2-17

2.7.1 Installing a License Key

To install a license key:

Caution

Failure to exercise proper electrostatic discharge precautions (such as wearing a grounded wrist strap) may reset the processor or damage electronic components, resulting in interrupted operations.

1. Perform the backup procedure described in “Preserving Configuration

and Log Data” in Chapter 6, Troubleshooting.

2. Remove power from the ROC827.

3. Remove the wire channel cover.

4. Unscrew the screws from the CPU faceplate.

5. Remove the CPU faceplate.

ROC827 Instruction Manual

6. Place the license key in the appropriate terminal slot (P4 or P6) in the

CPU (refer to Figure 2-7).

Incorrect Correct

Figure 2-9. License Key Installation

Note: If you are installing a single license key, place it in slot P4.

7. Press the license key into the terminal until it is firmly seated. Refer to

Figure 2-8.

8. Replace the CPU faceplate.

9. Replace the screws on the CPU faceplate.

10. Replace the wire channel cover.

11. Review “Restarting the ROC827” in Chapter 6, Troubleshooting.

12. Restore power to the ROC827.

Issued Mar-06 Installation and Use 2-18

2.7.2 Removing a License Key

To remove a license key:

Caution

Failure to exercise proper electrostatic discharge precautions (such as wearing a grounded wrist strap) may reset the processor or damage electronic components, resulting in interrupted operations.

1. Perform the backup procedure described in “Preserving Configuration

and Log Data” in Chapter 6, Troubleshooting.

2. Remove power from the ROC827.

3. Remove the wire channel cover.

4. Unscrew the screws from the CPU faceplate.

5. Remove the CPU faceplate.

ROC827 Instruction Manual

6. Remove the license key from the appropriate terminal slot (P4 or P6)

in the CPU (refer to Figure 2-7).

7. Replace the CPU faceplate.

8. Replace the screws from the CPU faceplate.

9. Replace the wire channel cover.

10. Review “Restarting the ROC827” in Chapter 6, Troubleshooting.

11. Restore power to the ROC827.

2.8 Startup and Operation

Before starting the ROC827, perform the following checks to ensure the unit components are properly installed.

 Make sure the power input module is properly seated in the backplane.  Make sure I/O and communication modules are seated in the

backplane.

 Check the field wiring for proper installation.  Make sure the input power has the correct polarity.  Make sure the input power is fused at the power source.

Issued Mar-06 Installation and Use 2-19

ROC827 Instruction Manual

Caution

2.8.1 Startup

Check the input power polarity before connecting power to the ROC827. Incorrect polarity can damage the ROC827.

Before you apply power to the ROC827, assess the power requirements (including the base unit, EXPs, and any installed modules and peripheral devices) that comprise the total configuration for your ROC827. Refer to “Determining Power Consumption” in Chapter 3, Power Connections.

Apply power to the ROC827 (refer to “Installing a Power Input Module” in Chapter 3, Power Connections). The power input BAT+ LED indicator should light green to indicate that the applied voltage is correct. Then, the STATUS indicator on the CPU should light to indicate a valid operation. Depending on the Power Saving Mode setting, the STATUS indicator may not remain lit during operation (refer to Table 2-2).

2.8.2 Operation

Once startup is successful, configure the ROC827 to meet the requirements of the application. Once it is configured and you have calibrated the I/O and any associated Multi-Variable Sensors (MVS, MVSS, MVSI, and so on), place the ROC827 into operation.

Caution

Issued Mar-06 Installation and Use 2-20

Chapter 3 – Power Connections

This chapter discusses the Power Input modules. It describes the modules, explains how to install and wire them, and provides worksheets to help you determine—and tune—the power requirements for the I/O and communications modules you can install in the ROC827 and the EXPs.

In This Chapter

3.1 Power Input Module Descriptions............................................................3-1

3.1.1 12-Volt DC Power Input Module (PM-12)......................................3-1

3.1.2 24-Volt DC Power Input Module (PM-24)......................................3-3

3.1.3 Auxiliary Output (AUX+ and AUX–)...............................................3-4

3.1.4 Switched Auxiliary Output (AUX

3.2 Determining Power Consumption............................................................3-7

3.2.1 Tuning the Configuration..............................................................3-11

3.3 Removing a Power Input Module ..........................................................3-20

3.4 Installing a Power Input Module ............................................................3-21

3.5 Connecting the ROC827 to Wiring........................................................3-21

3.5.1 Wiring the DC Power Input Module .............................................3-22

3.5.2 Wiring the External Batteries .......................................................3-23

3.5.3 Replacing the Internal Battery .....................................................3-25

3.6 Related Specification Sheets.................................................................3-26

ROC827 Instruction Manual

+ and AUXSW–)........................3-6

3.1 Power Input Module Descriptions

As a ROC800-Series controller, the ROC827 uses a Power Input module to convert external input power to the voltage levels the ROC827’s electronics require. The module also monitors voltage levels to ensure proper operation. Two Power Input modules—12 V dc (PM-12) and 24 V dc (PM-24)—are available for the ROC827.

The power consumption of a ROC827 and any attached expandable backplanes determines the current requirements for the external power supply. Refer to Section 3.2, “Determining Power Consumption” for a discussion and worksheets on assessing power requirements.

The Power Input module has removable terminal blocks for wiring and servicing. The terminal blocks can accept wire sizes 12 AWG (American Wire Gauge) or smaller.

3.1.1 12-Volt DC Power Input Module (PM-12)

Using the PM-12, the ROC827 can accept 12 Volts dc (nominal) input power from an AC/DC converter or other 12-volt dc supply. The input source should be fused and connected to the BAT+ and BAT– terminals (see Figure 3-1). The base system (CPU, power input, and backplane) requires less than 70 mA. The Power Input module economizes power consumption using 3.3 Volts dc switching power that provides power to

Issued Mar-06 Power Connections 3-1

ROC827 Instruction Manual

–

the ROC800-Series modules via the backplane. The ROC827 requires

11.25 to 14.25 Volts dc for proper operation.

BAT+ / BAT–

CHG+ / CHG

AUX+ / AUX

AUXSW+ / AUXSW–

Figure 3-1. 12 Volt dc Power Input Module

The CHG+ and CHG– terminals comprise an Analog Input channel that allows you to monitor an external voltage between 0 to 18 volts dc. For example, you can connect a solar panel upstream of the solar regulator to monitor the output of the solar panel. This allows you to compare the System AI Point Number 2 for the charging voltage (CHG+) to the actual battery voltage (BAT+) System AI Point Number 1 and take action as required. The ROC827 has a low-voltage cut-off circuit built-in to guard against draining power supply batteries. Refer to “Automatic Self Tests” in Chapter 1, General Information.

VOK LED

OFF

OVER

TEMP LED

LED

Use the AUX+ / AUX– terminals to supply reverse polarity protected source voltage to external devices, such as a radio or solenoid. Use the AUX devices. The AUX

+ / AUXSW– terminals to provide switched power for external

+ is turned off when the ROC827 detects a software

configurable voltage at the BAT+ / BAT– terminals. Table 3-1 details the specific connection information for the 12 volt dc

(PM-12) Power Input module. Table 3-2 indicates the LED fault indicators.

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ROC827 Instruction Manual

Table 3-1. 12 Volt dc Power Input Terminal Block Connections

Terminal Blocks Definition Volts DC

BAT+ and BAT–

CHG+ and CHG–

AUX+ and AUX–

AUXSW+ and AUXSW–

Accepts 12 Volts dc nominal from an AC/DC converter or other 12 Volts dc supply.

Analog Input used to monitor an external charging source.

Supplies reverse polarity protected source voltage to external devices. Fused.

Supplies switched power for external devices.

 Absolute Maximum: 11.25 to 16 Volts

 Recommended Operating Range:

11.25 to 14.25 Volts dc

 0 to 18 Volts dc

 BAT+ minus ∼0.7 Volts d c

 0 to 14.25 Volts dc

Table 3-2. 12 Volt DC Power Input LED Fault Indicators

Signal LED

Green LED on when voltage is in tolerance on BAT+ and BAT–.

OFF

OVER

TEMP

Fault – Red LED on when the AUX

the CPU control line.

Fault – Red LED on when AUX

voltage on BAT+.

Fault – Red LED on when AUX

the excess temperature of the Power Input module.

+ output are disabled by

+ is disabled due to excess

+ output are disabled due to

3.1.2 24-Volt DC Power Input Module (PM-24)

Using the PM-24, the ROC827 can accept 24 Volts dc (nominal) input power from an AC/DC converter or other 24 Volts dc supply connected to the + and – terminals. Connect the input power to either or both of the + and – channels. The 24 V dc Power Input module (PM-24) does not have CHG terminals for monitoring a charging voltage, and does not monitor the input voltage for alarming, sleep mode, or other monitoring purposes. The module has two LEDs that indicate voltage is received at the backplane and the CPU (see Figure 3-2 and Tables 3-3 and 3-4).

The base system (CPU, power input, and backplane) requires less than 70 mA. The Power Input module economizes power consumption using 3.3 Volts dc switching power that provides power to the I/O and communications modules installed in the ROC827 and any expanded backplanes. With this Power Input module installed, the ROC827 requires 20 to 30 Volts dc for proper operation.

Use the AUX+ and AUX– terminals to supply reverse polarity protected source voltage to external devices, such as a radio or solenoid.

Issued Mar-06 Power Connections 3-3

ROC827 Instruction Manual

V12 LED

+ / –

V3 LED

AUX+ / AUX–

Figure 3-2. 24 Volt dc Power Input Module

Table 3-3. 24 Volt dc Power Input Terminal Block Connections

Terminal Blocks Definition Volts DC

+ and –

AUX+ and AUX–

Accepts 24 Volts dc nominal from an AC/DC converter or other 24 Volts dc supply.

Supplies reverse polarity protected source voltage to external devices. Fused.

18 to 30 Volts dc

+12 Volts dc minus ∼0.7 Volts dc

Table 3-4. 24 Volt dc Power Input LED Indicators

Signal LED

Green LED on when voltage is provided to backplane.

Green LED on when voltage is provided to CPU.

3.3

3.1.3 Auxiliary Output (AUX+ and AUX–)

You can use the AUX+ and AUX– terminals to supply reverse polarity protected source voltage to external devices, such as a radio or a solenoid. All module terminal blocks accept 12 AWG or smaller wiring. Refer to Figures 3-3 and 3-4.

For the 12-volt dc Power Input module (PM-12), the auxiliary output follows the voltage located at BAT+ minus ~0.7 Volts dc, which is the protection diode voltage drop. For example, if the BAT+ voltage is 13 volts dc, then AUX+ is ~12.3 Volts dc.

For the 12-volt dc Power Input module, AUX+ / AUX– is always on and is current-limited by a fast acting glass 2.5 Amp x 20 mm fuse. In the event that the fuse blows, CSA requires that you replace the 2.5 Amp fast-acting fuse with a Little Fuse 217.025 or equivalent. Refer to “Automatic Self Tests” in Chapter 1, General Information.

Issued Mar-06 Power Connections 3-4

ROC827 Instruction Manual

–

For the 24 volt Power Input module (PM-24), the AUX voltage is always 12 Volts dc minus ~0.7 Volts. AUX+ / AUX– is internally current-limited by a 0.5 Amp Positive Temperature Coefficient (PTC).

If you need to cycle power to the radio or other device to reduce the load on the power source (a recommended practice when using batteries), use a Discrete Output (DO) module to switch power on and off. Refer to the ROCLINK 800 Configuration Software User Manual (Form A6121).

Power Supply

Terminal Block

AUXsw AUX

+ – +

Figure 3-3. 12 Volt dc Auxiliary Power Wiring

Power Supply

Terminal Block

AUX – +

2 Amp or less

Fast ActingFuse

0.5 Amp or less

Fast Acting Fuse

Other Equipment

2.5 Amps Maximum

Current On. Non-switched

Other Equipment

14.5 Volts DC Maximum @ 0.5 Amps Switched Powe

Other Equipment

12 Volts DC Maximum @ 0.5 Amps

Current-Limited Always On

–

809AUX.DSF

809AUX24.DSF

Figure 3-4. 24 Volt dc Auxiliary Power Wiring

Removing the

To remove the auxiliary output fuse:

Auxiliary Output Fuse

1. Perform the procedure described in Section 3.3, “Removing a Power

Input Module.”

2. Remove the fuse located at F1 on the Power Input module.

Installing the Auxiliary

To re-install the auxiliary output fuse:

Output Fuse

1. Replace the fuse located at F1 on the Power Input module.

2. Perform the procedure described in Section 3.4, “Installing a Power

Input Module.”

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ROC827 Instruction Manual

3.1.4 Switched Auxiliary Output (AUXSW+ and AUXSW–)

The AUXSW+ and AUXSW– terminals on the 12 volt dc Power Input module (PM-12) provide switched power for external devices, such as radios. AUX the external device via a 0.5 Amp nominal Positive Temperature Coefficient (PTC). The AUX voltages from 0 to 14.25 Volts dc. AUX ROC827 detects a software configurable voltage (LoLo Alarm) at the BAT+ and BAT– terminals. All module terminal blocks accept 12 AWG or smaller wiring. Refer to Figure 3-3.

If the source voltage falls to a level below which reliable operation cannot be ensured, the hardware circuitry on the Power Input module automatically disables the AUX approximately 8.85 Volts dc, and is based on the LoLo Alarm limit set for the System Battery Analog Input Point Number 1. The low input voltage detect circuit includes approximately 0.75 Volts dc of hysteresis between turn-off and turn-on levels.

The presence of high input voltage can damage the linear regulator. If the dc input voltage at BAT+ exceeds 16 volts, the over-voltage detect circuit automatically disables the linear regulator, shutting off the unit. For further information on the STATUS LED functions, refer to Table 2-2 in Chapter 2, Installation and Use.

+ is current-limited for protection of the power input and

+ and AUXSW– terminals provide

+ is turned off when the

+ outputs. This activity occurs at

Issued Mar-06 Power Connections 3-6

3.2 Determining Power Consumption

Determining the power consumption requirements for a ROC827 configuration involves the following steps:

1. Determine your ideal ROC827 configuration, which includes

identifying all modules, device relays, meters, solenoids, radios, transmitters, and other devices that may receive DC power from the complete ROC827 configuration (base unit and EXPs).

Note: You should also identify any devices (such as a touch screen

panel) that may be powered by the same system but not necessarily by the ROC827.

2. Calculate the “worst-case” DC power consumption for that

configuration by totaling the combined power draw required for all installed modules, as well as accounting for the power any modules provide to external devices (through the use of +T).

ROC827 Instruction Manual

Note: “+T” describes the isolated power some modules (such as AI,

AO, PI, and HART) may supply to external devices, such as 4–20 mA pressure and temperature transducers.

3. Verify that the power input module you intend to use can meet the

power requirements calculated in the first step. This verification helps you identify and anticipate power demands

from +T external devices that exceed the capabilities of the PM-12 or PM-24 Power Input modules. In this case, you can then make arrangements to externally power these field devices.

4. “Tune” (if necessary) the configuration by providing external power

or re-assessing the configuration to lessen the power requirements from the ROC827.

To assist you in this process, this chapter contains a series of worksheets (Tables 3-5 through 3-16) that help you to identify and assess the power requirements for each component of your ROC827 system. Table 3-5 identifies the power requirements related to the ROC827 base unit and summarizes the power requirements you identify on Tables 3-6 through 3-16. (Complete Tables 3-6 through 3-15 to calculate the power consumption for each of the I/O modules, and then transfer those results to Table 3-5.) Completing Table 3-5 enables you to quickly determine whether the power input module you intend to use is sufficient for your configuration. If the power module is not sufficient, you can then review individual worksheets to determine how to best “tune” your configuration and lessen power demands.

Issued Mar-06 Power Connections 3-7

ROC827 Instruction Manual

General Calculation

Process

To calculate the power the ROC827 requires:

1. Determine the kind and number of communication modules and the

kind and number of expanded backplanes you are implementing. Enter those values in the Quantity Used column of Table 3-5.

2. Multiply the P

value by the Quantity Used. Enter the values in

Typical

the Sub-Total column of Table 3-5. Perform this calculation for both the communications module and the LED.

3. Determine the kind and number of I/O modules you are implementing

and complete Tables 3-6 through 3-15 for those modules. For each applicable I/O module:

a. Calculate the P

values and enter them in the P

Typical

columns of each table. Perform this calculation for the I/O modules, LEDs (if applicable), channels (if applicable), and any other devices.

b. Calculate the Duty Cycle value for each I/O module and each I/O

channel (as applicable). Enter those values in the Duty Cycle column of Tables 3-6 through 3-15.

c. Multiply the P

values by the Quantity Used by the Duty

Typical

Cycle on each applicable table. Enter those individual sub-totals in the Sub-Total column on each table and add the sub-totals to calculate the Total for the table.

4. Transfer the totals from Tables 3-6 through 3-15 to their respective

lines in the Sub-Total column on Table 3-5.

5. Add the Sub-Total values for Tables 3-6 through 3-15. Enter that

value in the Total for All Modules line on Table 3-5.

6. Add the value from the Total for ROC827 Base Unit to the Total for

All Modules. Enter that result in the Total for ROC827 Base Unit and All Modules line.

7. Transfer the Other Devices total from Table 3-16 to its respective line

in the Sub-Total column on Table 3-5.

8. Add the values from Total for ROC827 Base Unit, Total for All

Modules, and the total for Other Devices. Enter that value in the Total for ROC827 Base Unit, All Modules, and Other Devices line.

9. Multiply the value in the Total for ROC827 Base Unit, Total for All

Modules, and Other Devices by 0.25. Enter the result in the Power System Safety Factor (0.25) line.

Note: This value represents a safety factor to the power system to

account for losses and other variables not factored into the power consumption calculations. This safety factor may vary depending on external influences. Adjust the factor value up or down accordingly.

Issued Mar-06 Power Connections 3-8

ROC827 Instruction Manual

10. Add the values for the Power System Safety Factor (0.25) to the Total

for ROC827 Base Unit, All Modules, and Other Devices to determine the total estimated power consumption for the configured ROC827 system.

Issued Mar-06 Power Connections 3-9

ROC827 Instruction Manual

Table 3-5. Estimated Power Consumption

Device

CPU and ROC827 Backplane

Power Input Module PM-12 110 mA @ 12 volts dc 1320 mW Power Input Module PM-24 55 mA @ 24 volts dc 1320 mW Per Active LED – Maximum 10 1.5 mA 18 mW

EIA-232 (RS-232) Module

Per Active LED – Maximum 4 1.5 mA 18 mW

EIA-422/485 (RS-422/485) Module

Per Active LED – Maximum 2 1.5 mA 18 mW

Dial-up Modem Module

Per Active LED – Maximum 4 1.5 mA 18 mW

Expanded Backplanes

70 mA @ 12 volts dc 840 mW 35 mA @ 24 volts dc 840 mW

Power Consumption (mW)

Description P

4 mA @ 12 volts dc 48 mW

112 mA @ 12 volts 1344 mW

95 mA @ 12 volts dc 1140 mW

TYPICAL

Quantity

Used

Sub-Total

(mW)

Total for ROC827 Base Unit mW

AI Modules AO Modules DI Modules DO Modules DOR Modules PI Modules MVS Modules RTD Modules Thermocouple Modules HART Modules

Total for ROC827 Base Unit and All Modules mW Other Devices

Power System Safety Factor (0.25) mW

Total for ROC827 Base Unit, All Modules, and

Total for Configured ROC827 mW

Total (from Table 3-6) Total (from Table 3-7) Total (from Table 3-8)

Total (from Table 3-9) Total (from Table 3-10) Total (from Table 3-11) Total (from Table 3-12) Total (from Table 3-13) Total (from Table 3-14) Total (from Table 3-15)

Total for All Modules mW

Total (from Table 3-16)

Other Devices

mW mW

Issued Mar-06 Power Connections 3-10

3.2.1 Tuning the Configuration

The PM-12 Power Input module can supply a maximum of 36 W (36000 mW) to the backplane, which includes the +T overhead. The PM-24, when operating between –40°C to 55°C, can supply a maximum of 30 W (30000 mW) to the backplane. Across its entire operating range (–40°C to 85°C) the PM-24 can supply 24 W (24000 mW).

Refer to Table 3-5 and the value you entered in the Total for ROC827 Base Unit and All Modules line. That is the value against which you “tune” your configuration to accommodate your Power Input module. If your configuration requires more power than the Power Input module you intend to use, you need to modify your I/O module configuration to reduce your power requirements.

ROC827 Instruction Manual

Tuning Hints

Review the content of Tables 3-6 through 3-15. Suggestions to help you better align the configuration of your ROC827 with the capability of the Power Input module you intend to use include:

 Reduce the +T usage by providing an external power supply for as

many transmitters or field devices needed to reduce the value in the Total for ROC827 Base Unit and All Modules line on Table 3-5 to below the capability of the Power Input module you intend to use.

 Reduce the +T usage by reducing the number of transmitters or field

devices.

 Reduce the total number of I/O modules by consolidating transmitters

or field devices onto as few I/O modules as possible.

Note: Tuning your I/O module configuration may require several

iterations to rework the content of Tables 3-6 through 3-15 until your power requirements match the capability of the Power Input module you intend to use.

Issued Mar-06 Power Connections 3-11

Table 3-6. Power Consumption of the Analog Input Modules

I/O Module

ANALOG INPUT AI Module Base Jumper set for +T @ 12 volts dc

Channel 1

Channel 2

Channel 3

Channel 4

Jumper set for +T @ 24 volts dc

Channel 1

Channel 2

Channel 3

Channel 4

ROC827 Instruction Manual

Power Consumption (mW)

Description P

84 mA @ 12 volts dc 1008 mW

Channel’s mA current

draw from +T * 1.25 * 12

Channel’s mA current

draw from +T * 1.25 * 12

Channel’s mA current

draw from +T * 1.25 * 12

Channel’s mA current

draw from +T * 1.25 * 12

Channel’s mA current

draw from +T * 2.50 * 12

Channel’s mA current

draw from +T * 2.50 * 12

Channel’s mA current

draw from +T * 2.50 * 12

Channel’s mA current

draw from +T * 2.50 * 12

TYPICAL

Quantity

Used

Duty

Cycle

Table Total

Sub-Total

(mW)

Duty Cycle

The duty cycle is based on the average current flow compared to the full-scale current flow value. To approximate the duty cycle, estimate the average current consumption in relation to its maximum range. For example, if an AI channel’s current averages 16 mA:

Duty Cycle = Average mA output ÷ Maximum mA Output = (16 ÷ 20) = 0.80

Issued Mar-06 Power Connections 3-12

Table 3-7. Power Consumption of the Analog Output Modules

I/O Module

AO Module Base Jumper set for +T @ 12 volts dc

Channel 1

Channel 2

Channel 3

Channel 4

Jumper set for +T @ 24 volts dc

Channel 1

Channel 2

Channel 3

Channel 4

ROC827 Instruction Manual

Power Consumption (mW)

Description P

100 mA @ 12 volts dc 1200 mW

Channel’s mA current

draw from +T * 1.25 * 12

Channel’s mA current

draw from +T * 1.25 * 12

Channel’s mA current

draw from +T * 1.25 * 12

Channel’s mA current

draw from +T * 1.25 * 12

Channel’s mA current

draw from +T * 2.50 * 12

Channel’s mA current

draw from +T * 2.50 * 12

Channel’s mA current

draw from +T * 2.50 * 12

Channel’s mA current

draw from +T * 2.50 * 12

TYPICAL

Quantity

Used

Duty

Cycle

Table Total

Sub-Total

(mW)

Duty Cycle

Duty Cycle = Average mA output ÷ Maximum mA Output = (12 ÷ 20) = 0.60

Issued Mar-06 Power Connections 3-13

ROC827 Instruction Manual

Table 3-8. Power Consumption of the Discrete Input Modules

I/O Module

DI Module Base

Channel 1 3.2 mA @ 12 volts dc 38.4 mW Channel 2 3.2 mA @ 12 volts dc 38.4 mW Channel 3 3.2 mA @ 12 volts dc 38.4 mW Channel 4 3.2 mA @ 12 volts dc 38.4 mW Channel 5 3.2 mA @ 12 volts dc 38.4 mW Channel 6 3.2 mA @ 12 volts dc 38.4 mW Channel 7 3.2 mA @ 12 volts dc 38.4 mW Channel 8 3.2 mA @ 12 volts dc 38.4 mW Per Active LED –

Maximum 8

Power Consumption (mW)

Description P

19 mA @ 12 volts dc No

Channels Active

1.5 mA 18 mW

TYPICAL

228 mW

Quantity

Used

Duty

Cycle

Table Total

Sub-Total

(mW)

Duty Cycle

The duty cycle is the time on divided by the total time, and is essentially the percent of time that the I/O channel is active (maximum power consumption).

Duty Cycle = Active time ÷ (Active time + Inactive time)

For example, if a Discrete Input is active for 15 seconds out of every 60 seconds:

Duty Cycle = 15 seconds ÷ (15 seconds + 45 seconds) = 15 seconds ÷ 60 seconds = 0.25

Issued Mar-06 Power Connections 3-14

ROC827 Instruction Manual

Table 3-9. Power Consumption of the Discrete Output Modules

I/O Module

DO Module

Channel 1 1.5 mA 18 mW Channel 2 1.5 mA 18 mW Channel 3 1.5 mA 18 mW Channel 4 1.5 mA 18 mW Channel 5 1.5 mA 18 mW Per Active LED –

Maximum 5

Power Consumption (mW)

Description P

20 mA @ 12 volts dc No

Channels Active

1.5 mA 18 mW

TYPICAL

240 mW

Quantity

Used

Duty

Cycle

Table Total

Sub-Total

(mW)

Duty Cycle

The duty cycle is the time on divided by the total time, and is essentially the percent of time that the I/O channel is active (maximum power consumption).

Duty Cycle = Active time ÷ (Active time + Inactive time)

For example, if a Discrete Output is active for 15 seconds out of every 60 seconds:

Duty Cycle = 15 seconds ÷ (15 seconds + 45 seconds) = 15 seconds ÷ 60 seconds = 0.25

Issued Mar-06 Power Connections 3-15

I/O Module

DOR Module

Channel 1

Channel 2

Channel 3

Channel 4

Channel 5 Per Active LED –

Maximum 5

ROC827 Instruction Manual

Table 3-10. Power Consumption of the Discrete Output Relay Modules

Power Consumption (mW)

Description P

6.8 mA @ 12 volts dc No Channels Active

150 mA for 10 mSec

during transition

150 mA for 10 mSec

during transition

150 mA for 10 mSec

during transition

150 mA for 10 mSec

during transition

150 mA for 10 mSec

during transition

1.5 mA

TYPICAL

81.6 mW

1800 mW

for 10 mSec

1800 mW

for 10 mSec

1800 mW

for 10 mSec

1800 mW

for 10 mSec

1800 mW

for 10 mSec

18 mW for

10 mSec

Quantity

Used

Duty

Cycle

Table Total

Sub-Total

(mW)

Duty Cycle

[((Number of Transitions in some time period) * 0.01 sec)] ÷ (Seconds in the period) = Duty Cycle

The duty cycle is:

For example, if a DOR channel changes state 80 times per hour:

 80 = Number of transitions.  Hour is the time period.  An hour contains 3600 seconds.

Calculate the duty cycle as:

Duty Cycle = [(80 * 0.01) ÷ 3600] = 0.0002

Issued Mar-06 Power Connections 3-16

ROC827 Instruction Manual

Table 3-11. Power Consumption of the High and Low Speed Pulse Input Modules

I/O Module

PI Module

Channel 1 7.4 mA 88.8 mW Channel 2 7.4 mA 88.8 mW

Per Active LED – Maximum 4

Jumper set to +T @ 12

volts dc

Jumper set to +T @ 24

volts dc

Power Consumption (mW)

Description P

21 mA @ 12 volts dc No

Channels Active

1.5 mA 18 mW

1.25 * Measured Current Draw at +T Terminal

2.5 * Measured Current Draw at +T Terminal

TYPICAL

252 mW

Quantity

Used

Duty

Cycle

Table Total

Sub-Total

(mW)

Duty Cycle

The duty cycle is the time on divided by the total time, and is essentially the percent of time that the I/O channel is active (maximum power consumption).

Duty Cycle = [Active Time * (Signals Duty Cycle)] ÷ (Total Time Period)

For example, if a Pulse Input receives a signal for 6 hours over a 24-hour time period and the signal’s wave form is on time for 1/3 of the signal’s period:

Duty Cycle = [6 hours * (1 ÷ 3)] ÷ (24 hours) = 0.0825

Issued Mar-06 Power Connections 3-17

Table 3-12. Power Consumption of the MVS Modules

I/O Module

MVS Module

Per Active LED – Maximum 2

Power provided by the module for the MVS sensors

Power Consumption (mW)

Description P

112 mA @ 12 volts dc 1344 m W

1.5 mA 18 mW

1.25 * Measured

Current Draw at +

Terminal

TYPICAL

Quantity

Note: For an MVS sensor, the typical mW per MVS is about 300 mW.

Duty Cycle

The duty cycle is the time on divided by the total time. For an MVS, the sensor is always drawing power, so enter the duty cycle as “1” for the MVS power calculations. The LEDs can also have an associated duty cycle, which is essentially the percent of time that the LEDs are active.

ROC827 Instruction Manual

Used

Duty

Cycle

Table Total

Sub-Total

(mW)

Duty Cycle = Active time ÷ (Active time + Inactive time)

For example, if the LEDs are on approximately 20 minutes a day:

Duty Cycle = 20 minutes ÷ (24 * 60 minutes in a day) = 20 ÷ 1440 = 0.014

Issued Mar-06 Power Connections 3-18

RTD Module

I/O Module

ROC827 Instruction Manual

Table 3-13. Power Consumption of the RTD Modules

Power Consumption (mW)

Description P

65 mA @ 13.25 volts dc 1

TYPICAL

Quantity

Used

Table Total

Duty

Cycle

Sub-Total

(mW)

Duty Cycle

An RTD has no associated duty cycle. Consequently, always set “1” as the duty cycle value.

Table 3-14. Power Consumption of the Thermocouple Modules

I/O Module

TYPE J OR K THERMOCOUPLE MODULE

T/C Module

Power Consumption (mW)

Description P

84 mA @ 12 volts dc 1008 mW 1

Duty Cycle

A thermocouple has no associated duty cycle. Consequently, always set “1” as the duty cycle value.

Table 3-15. Power Consumption of the HART Modules

Other Device

HART Module Base

Each Channel

Power Consumption (mW)

Description P

110 mA @ 12 volts dc 1320 mW Channel’s mA current

draw from +T * 2.50 * 12

Quantity

Used

TYPICAL

Quantity

Used

TYPICAL

Duty

Cycle

Table Total

Duty

Cycle

Table Total

Sub-Total

(mW)

Issued Mar-06 Power Connections 3-19

ROC827 Instruction Manual

Table 3-16. Power Consumption of Other Devices

Other Device

Power Consumption (mW)

Description P

TYPICAL

Quantity

Used

Duty

Cycle

Total

Sub-Total

(mW)

Although Tables 3-5 and Tables 3-6 through 3-15 take into account the power the ROC827 supplies to its connected devices, be sure to add the power consumption (in mW) of any other devices (such as radios or solenoids) used with the ROC827 in the same power system, but which are not accounted for in Tables 3-6 through 3-15.

Enter that Total value in the Other Devices line of Table 3-5.

3.3 Removing a Power Input Module

To remove the Power Input module:

Caution

Failure to exercise proper electrostatic discharge precautions, such as wearing a grounded wrist strap may reset the processor or damage electronic components, resulting in interrupted operations.

1. Perform the backup procedure described in “Preserving Configuration

and Log Data” in Chapter 6, Troubleshooting.

2. Remove power from the ROC827.

3. Remove the wire channel cover.

4. Unscrew the two captive screws on the front of the Power Input

module.

5. Remove the Power Input module.

Note: If you intend to store the ROC827 for an extended period, also

remove the internal backup battery.

Issued Mar-06 Power Connections 3-20

3.4 Installing a Power Input Module

To install the Power Input module:

Caution

Failure to exercise proper electrostatic discharge precautions, such as wearing a grounded wrist strap may reset the processor or damage electronic components, resulting in interrupted operations.

Note: Remove the plastic module cover and wire channel cover, if

present.

1. Slide the Power Input module into the slot.

2. Press the module firmly into the slot. Make sure the connectors at the

back of the Power Input module fit into the connectors on the backplane.

ROC827 Instruction Manual

3. Tighten the two captive screws on the front of the Power Input

module firmly (refer to Figures 3-1 and 3-2).

4. Replace the wire channel cover.

5. Review “Restarting the ROC827” in Section 6, Troubleshooting.

6. Return power to the ROC827.

3.5 Connecting the ROC827 to Wiring

The following paragraphs describe how to connect the ROC827 to power. Use the recommendations and procedures described in the following paragraphs to avoid damage to equipment.

Use 12 American Wire Gauge (AWG) wire or smaller for all power wiring.

Caution

Always turn off the power to the ROC827 before you attempt any ty pe of wiring. Wiring of powered equipment could result in personal injury or property damage.

To avoid circuit damage when working with the unit, use appropriate electrostatic discharge precautions, such as wearing a grounded wrist strap.

To connect the wire to the removable block compression terminals:

1. Bare the end (¼ inch maximum) of the wire.

2. Insert the bared end into the clamp beneath the termination screw.

3. Tighten the screw.

Issued Mar-06 Power Connections 3-21

The ROC827 should have a minimum of bare wire exposed to prevent short circuits. Allow some slack when making connections to prevent strain.

3.5.1 Wiring the DC Power Input Module

Use 12 American Wire Gauge (AWG) wire or smaller for all power wiring. It is important to use good wiring practice when sizing, routing, and connecting power wiring. All wiring must conform to state, local, and NEC codes.

Verify the hook-up polarity is correct. To make DC power supply connections:

1. Perform the backup procedure described in “Preserving Configuration

and Log Data” in Chapter 6, Troubleshooting.

2. Install a surge protection device at the service disconnect.

3. Remove all other power sources from the ROC827.

4. Install a fuse at the input power source.

ROC827 Instruction Manual

5. Remove the terminal block connector from the socket.

6. Insert each bared wire end from either the:

 12 Volts dc source into the clamp beneath the appropriate BAT+ /

BAT– termination screw.

 24 Volts dc source into the clamp beneath the appropriate BAT+ /

BAT– termination screw. The + terminal should have a similar fuse to the 12 Volts dc Power Input Module.

– CHG+ – BAT+

5 Amp Fuse

12 Volt DC Battery Bank

AC to 12 Volt DC Power Supply

24 Volt DC/12 Volt DC Power Converter

Other 12 Volt DC Nominal Source

BATWIRE.DSF

Figure 3-5. 12 Volts dc Power Supply and BAT+ / BAT– Wiring

7. Screw each wire into the terminal block.

8. Plug the terminal block connector back into the socket.

9. If you are monitoring an external charge voltage (12 Volts dc Power

Input Module only), wire the CHG+ and CHG– terminal block connector. Refer to Figure 3-6.

Issued Mar-06 Power Connections 3-22

ROC827 Instruction Manual

+ –

–

809CHG.DSF

Power Supply

Terminal Block

– CHG+ – BAT+

5 Amp Fuse

Batteries

–

Regulator

–

5 Amp Fuse

Solar

Figure 3-6. 12 Volt dc Power Supply and CHG+ and CHG– Wiring

10. Replace all other power sources (if necessary) to the ROC827.

11. Review “Restarting the ROC827” in Chapter 6, Troubleshooting.

Solar Panel

Note: Refer to Table 3-2 concerning LEDs.

3.5.2 Wiring the External Batteries

You can use external batteries as the main source of power for the ROC827 with the 12 volts dc Power Input module (PM-12). The maximum voltage that can be applied to the BAT+ / BAT– terminals is 16 volts dc before damage may occur. The recommended maximum voltage is 14.5 volts dc (refer to Table 3-2 concerning LEDs).

It is important that you use good wiring practices when sizing, routing, and connecting power wiring. All wiring must conform to state, local, and NEC codes. Use 12 American Wire Gauge (AWG) or smaller wire for all power wiring.

Batteries should be rechargeable, sealed, gel-cell, lead-acid batteries. Connect batteries in parallel to achieve the required capacity (refer to

Figure 3-6). The amount of battery capacity required for a particular installation depends upon the power requirements of the equipment and days of reserve (autonomy) desired. Calculate battery requirements based on power consumption of the ROC827 and all devices powered by the batteries.

Issued Mar-06 Power Connections 3-23

ROC827 Instruction Manual

Battery Reserve

Battery reserve is the amount of time that the batteries can provide power without discharging below 20% of their total output capacity. The battery reserve should be a minimum of five days, with ten days of reserve preferred. Add 24 hours of reserve capacity to allow for overnight discharge. Space limitations, cost, and output are all factors that determine the actual amount of battery capacity available.

To determine the system capacity requirements, multiply the system current load on the batteries by the amount of reserve time required, as shown in the following equation:

System Requirement = Current Load in Amps * Reserve Hours = _____ Amp Hours

Caution

When using batteries, apply in-line fusing to avoid damaging the ROC827.

To make battery connections:

1. Perform the backup procedure described in “Preserving Configuration

and Log Data” in Chapter 6, Troubleshooting.

2. Remove the BAT+ and BAT– terminal block connector from the

socket.

3. Install a fuse at the input power source.

4. Insert each bared wire end into the clamp beneath the BAT+ and

BAT– termination screws (refer to Figure 3-5).

5. Screw each wire into the terminal block.

6. Review “Restarting the ROC827” in Chapter 6, Troubleshooting.

7. Re-apply power to the ROC827.

Note: Refer to Table 3-2 concerning LEDs.

Issued Mar-06 Power Connections 3-24

3.5.3 Replacing the Internal Battery

The internal Sanyo 3 volt CR2430 lithium backup battery located on the CPU provides backup of the data and the Real-Time Clock when the main power is not connected. The battery has a one-year minimum backup life while the battery is installed and no power is applied to the ROC827. The battery has a ten-year backup life while the backup battery is installed and power is applied to ROC827 or when the battery is removed from the ROC827.

Recommended replacement Lithium/Manganese Dioxide batteries include:

Table 3-17. Replacement Battery Types

ROC827 Instruction Manual

Caution

Part Size Type Capacity Acceptable Types

Battery, Lithium, 3V 24 mm (0.94 in) diameter x 3 mm (0.12 in) height Coin Type 280 mAh minimum

 Duracell DL2430  Eveready CR2430  Sanyo CR2430  Varta CR2430

Note: Remove the internal backup battery if you intend to store the

ROC827 for an extended period.

When working on units located in a hazardous area (where explosive gases may be present), make sure the area is in a non-hazardous state before performing these procedures. Performing these procedures in a hazardous area could result in personal injury or property damage.

To avoid circuit damage when working inside the unit, use appropriate electrostatic discharge precautions, such as wearing a grounded wrist strap.

1. Perform the backup procedure described in “Preserving Configuration

and Log Data” in Chapter 6, Troubleshooting. Note: Removing the battery erases the contents of the ROC827’s

RAM.

2. Remove all power from the ROC827.

3. Remove the wire channel cover.

4. Remove the two screws on the CPU faceplate.

5. Remove the CPU faceplate.

6. Remove the CPU (as described in “Removing the CPU Module” in

Chapter 2, Installation and Use).

Issued Mar-06 Power Connections 3-25

7. Insert a plastic screwdriver behind the battery and gently push the

battery out of the battery holder. Note how the battery is oriented: the negative side of the battery (–) is placed against the CPU and the positive (+) towards the + label on the battery holder.

8. Insert the new battery in the battery holder paying close attention to

install the battery with the correct orientation.

9. Reinstall the CPU (as described in “Installing the CPU Module” in

Chapter 2, Installation and Use).

10. Replace the CPU faceplate.

11. Replace the two screws to secure the CPU faceplate.

12. Replace the wire channel cover.

13. Review “Restarting the ROC827” in Chapter 6, Troubleshooting.

14. Apply power to the ROC827.

3.6 Related Specification Sheets

ROC827 Instruction Manual

Refer to the following specification sheets (available at

www.EmersonProcess.com/flow

) for additional and most-current

information on the Power Input modules for the ROC827.

Table 3-18. Power Input Module Specification Sheets

Name Form Number Part Number

Power Input Modules (ROC800-Series) 6.3:PIM D301192X012

Issued Mar-06 Power Connections 3-26

Chapter 4 – Input/Output Modules

This chapter describes the Input/Output (I/O) modules used with the ROC827 and expandable backplanes and contains information on installing, wiring, and removing the I/O modules.

In This Chapter

4.1 I/O Module Overview...............................................................................4-1

4.2 Installation................................................................................................4-3

4.2.1 Installing an I/O Module.................................................................4-4

4.2.2 Removing an I/O Module...............................................................4-5

4.2.3 Wiring I/O Modules ........................................................................4-6

4.3 Analog Input Modules..............................................................................4-6

4.4 Analog Output Modules...........................................................................4-8

4.5 Discrete Input Modules............................................................................4-9

4.6 Discrete Output Modules.......................................................................4-10

4.7 Discrete Output Relay Modules.............................................................4-11

4.8 Pulse Input Modules..............................................................................4-12

4.9 RTD Input Modules................................................................................4-14

4.9.1 Connecting the RTD Wiring.........................................................4-15

4.10 J and K Type Thermocouple Input Modules..........................................4-16

4.11 Related Specification Sheets.................................................................4-21

ROC827 Instruction Manual

4.1 I/O Module Overview

The I/O modules typically consist of a terminal block for field wiring and connectors to the backplane. The ROC827 base unit supports up to three I/O modules. Each expandable backplane (EXP) can accommodate up to six I/O modules, and a fully configured ROC827 can handle up to 27 I/O modules (three on the base unit and six modules on each of up to four expandable backplanes). Each I/O module electrically connects to field wiring by a removable terminal block. Refer to Figures 4-1 and 4-2.

Note: Figure 4-2 represents a ROC827 with one EXP.

Issued Mar-06 Input/Output Modules 4-1

Front View Side View

Figure 4-1. Typical I/O Module

ROC827 Instruction Manual

DOC0513A

I/O Slot #4

I/O Slot #1 o

Comm 3

I/O Slot #2 or

Comm 3 or 4

I/O Slot #3 or

Comm 3, 4, or 5

I/O Slot #7

I/O Slot #5

I/O Slot #8

I/O Slot #6

I/O Slot #9

Figure 4-2. Optional I/O Module Locations (ROC827 with one EXP)

I/O modules for the ROC827 include:  Analog Input (AI) modules that provide the ability to monitor various

analog field values.

 Discrete Input (DI) and Pulse Input (PI) modules that provide the

ability to monitor various discrete and pulse input field values.

Issued Mar-06 Input/Output Modules 4-2

ROC827 Instruction Manual

 Analog Output (AO), Discrete Output (DO), and Discrete Output

Relay (DOR) modules that provide the ability to manage various control devices.

 The RTD Input and Thermocouple Input (T/C) modules that provide

the ability to monitor various analog temperature field values.

 The Highway Addressable Remote Transducer (HART) interface

modules that enable the ROC827 to communicate with HART devices using the HART protocol as either Analog Inputs or Analog Outputs.

Each module rests in a module slot at the front of the ROC827 base unit or EXP housing. You can easily install or remove I/O modules from the module slots while the ROC827 is powered up (hot-swappable). Modules may be installed directly into unused module slots (hot-pluggable), and modules are self-identifying in the software. All modules have removable terminal blocks to make servicing easy. I/O modules can be added in any module slot.

The I/O modules acquire power from the backplane. Each module has an isolated DC/DC converter that provides logic, control, and field power as required. The ROC827 has eliminated the need for fuses on the I/O modules through the extensive use of current-limited short-circuit protection and over voltage circuitry. Isolation is provided from other modules and the backplane, power, and signal isolation. The I/O modules are self-resetting after a fault clears.

4.2 Installation

Caution

Each I/O module installs in the ROC827 in the same manner. You can install any I/O module into any module socket, whether empty or in place of another module.

Failure to exercise proper electrostatic discharge precautions, such as wearing a grounded wrist strap may reset the processor or damage electronic components, resulting in interrupted operations.

When installing units in a hazardous area, make sure all installation components selected are labeled for use in such areas. Installation and maintenance must be performed only when the area is known to be nonhazardous. Installation in a hazardous area could result in personal injury or property damage.

You can insert or remove the I/O modules while power is connected to the ROC827. If the ROC827 is powered, exercise caution while performing the following steps to install a module.

Note: After you install a new I/O module or replace an existing I/O

module, it may be necessary to reconfigure the ROC827. To change configuration parameters, use ROCLINK 800 software to make changes to the new module. Any added modules (new I/O points) start up with

Issued Mar-06 Input/Output Modules 4-3

default configurations. Refer to the ROCLINK 800 Configuration Software User Manual (Form A6121).

4.2.1 Installing an I/O Module

To install an I/O module in either the ROC827 or the EXP:

1. Remove the wire channel cover.

Note: Leaving the wire channel cover in place can prevent the module

from correctly connecting to the socket on the backplane.

2. Perform one of the following:

 If there is a module currently in the slot, unscrew the captive

screws and remove that module (refer to “Removing an I/O Module”).

 If the slot is currently empty, remove the module cover.

3. Insert the new I/O module through the module slot on the front of the

ROC827 or EXP housing. Make sure the label on the front of the module faces right side up (refer to Figure 4-3). Gently slide the module in place until it contacts properly with the connectors on the backplane.

ROC827 Instruction Manual

Note: If the module stops and will not go any further, do not force the

module. Remove the module and see if the pins are bent. If the pins are bent, gently straighten the pins and re-insert the module. The back of the module must connect fully with the connectors on the backplane.

Issued Mar-06 Input/Output Modules 4-4

ROC827 Instruction Manual

Figure 4-3. Installing an I/O Module

4. Tighten the captive screws on the front of the module.

5. Wire the I/O module (refer to “Wiring I/O Modules”).

6. Replace the wire channel cover.

Caution

Never connect the sheath surrounding shielded wiring to a signal ground terminal or to the common terminal of an I/O module. Doing so makes the I/O module susceptible to static discharge, which can permanently damage the module. Connect the shielded wiring sheath only to a suitable earth ground.

7. Connect to ROCLINK 800 software and login. The I/O modules are

self-identifying after re-connecting to ROCLINK 800 software.

8. Configure the I/O point.

4.2.2 Removing an I/O Module

To remove an I/O module:

1. Remove the wire channel cover.

2. Unscrew the two captive screws holding the module in place.

3. Gently pull the module’s lip out and remove the module from the slot.

You may need to gently wiggle the module.

4. Install a new module or install the module cover.

5. Screw the two captive screws to hold the module or cover in place.

Issued Mar-06 Input/Output Modules 4-5

6. Replace the wire channel cover.

4.2.3 Wiring I/O Modules

All modules have removable terminal blocks for convenient wiring and servicing. The terminal blocks can accommodate a wide range of wire gauges (12 AWG or smaller).

Caution

Failure to exercise proper electrostatic discharge precautions, such as wearing a grounded wrist strap may reset the processor or damage electronic components, resulting in interrupted operations.

To connect the wire to the removable block compression terminals:

1. Bare the end (¼ inch maximum) of the wire.

2. Insert the bared end into the clamp beneath the termination screw.

3. Tighten the screw.

The ROC827 should have a minimum of bare wire exposed to prevent short circuits. Allow some slack when making connections to prevent strain.

ROC827 Instruction Manual

Note: All modules have removable terminal blocks for convenient wiring

and servicing. Twisted-pair cable is recommended for I/O signal wiring. The removable terminal blocks accept 12 AWG or smaller wire.

4.3 Analog Input Modules

The four Analog Input (AI) channels are scalable, but typically measure either:

 4- to 20-mA analog signal, with the use of a precision resistor

(supplied).

 1 to 5 Volts dc signal. If required, you can calibrate the low end of the analog signal to zero. You can configure the AI (+T) module as either 12 or 24 Volt dc using

jumper J4 on the I/O module (see Figure 4-4). The AI modules can provide isolated +12 Volt dc or +24 Volt dc field transmitter power on a per-module basis. For example, one module can provide +12 Volts dc for powering low power analog transmitters, while another module in the same ROC827 can provide +24 Volts dc for powering conventional 4- to 20-mA transmitters. Refer to Figure 4-5:

Issued Mar-06 Input/Output Modules 4-6

ROC827 Instruction Manual

Precision

Resisto

Figure 4-4. Analog Input Jumper J4 – Set to +24V

1-5 VOLT DEVICE EXTERNALLY POWERED

OUT SIGNAL

COM IN

1-5 VOLT DEVICE EXTERNALLY POWERED

CURRENT LOOP DEVICE 4-20mA ROC809 POWERED

+T 12 / 24 V dc Jumper

DOC0506A

Figure 4-5. Analog Input Module Field Wiring

Note: All I/O modules are isolated on the field side. Be aware that you can

induce ground loops by tying commons from various modules together.

Issued Mar-06 Input/Output Modules 4-7

4.4 Analog Output Modules

The 16-bit Analog Output (AO) module has four channels that provide a current output for powering analog devices. Analog Outputs are analog signals the ROC827 generates to regulate equipment, such as control valves or any device requiring analog control.

Each channel on this module provides a 4- to 20-mA current signal for controlling analog current loop devices. The AO module isolation includes the power supply connections.

Note: AO modules (Part Number W38199) with front labels that read AO-

16 are an earlier version that controls the low side current. AO modules

(Part Number W38269) with front labels that read AO are the newer version (January 2005 and later) and control the high side current.

You can configure the AO module as either 12 or 24 Volts dc via jumper J4 on the I/O module (see Figure 4-6). The AO module can provide isolated +12 Volts dc or +24 Volts dc field transmitter power on a per module basis. For example, one module can provide +12 Volts dc for powering low-power analog transmitters, while another module in the same ROC827 can provide +24 Volts dc for powering conventional 4- to 20-mA transmitters. Refer to Figure 4-7.

ROC827 Instruction Manual

+T 12 / 24 V dc Jumper

Figure 4-6. Analog Output Jumper J4 (Shown Set to +12V)

Issued Mar-06 Input/Output Modules 4-8

ROC827 Instruction Manual

Representative Internal Circuit

CURRENT LOOP

CONTROL

CURRENT LOOP

CONTROL

CURRENT LOOP

CONTROL

CURRENT LOOP

CONTROL

Field Wiring

DOC0505A

250

CURRENT LOOP DEVICE 4-20mA

ROC800 POWERED

1-5 VOLT CONTROL DEVICE

Figure 4-7. Analog Output Module Field Wiring

Note: All I/O modules are isolated on the field side. Be aware that you can

induce ground loops by tying commons from various modules together.

4.5 Discrete Input Modules

The eight-channel Discrete Input (DI) modules monitor the status of relays, open collector/open drain type solid-state switches, and other twostate devices. Discrete Inputs come from relays, switches, and other devices, which generate an on/off, open/close, or high/low signal.

The DI module provides a source voltage for dry relay contacts or for an open-collector solid-state switch.

The DI module’s LEDs light when each input is active. Each DI channel can be software-configured to function as a momentary

or latched DI. A latched DI remains in the active state until reset. Other parameters can invert the field signal and gather statistical information on the number of transitions and the time accumulated in the on- or off-state.

Caution

The Discrete Input module operates with non-powered discrete devices, such as “dry” relay contacts or isolated solid-state switches. Use of the DI module with powered devices may cause improper operation or damage.

The DI module senses the current flow, which signals the ROC827 electronics that the relay contacts have closed. The opening of the contacts interrupts the current flow and the DI module signals the ROC827 electronics that the relay contacts have opened. A ROC827 can read a DI a maximum of 20 times per second (50 millisecond scan).

Issued Mar-06 Input/Output Modules 4-9

ROC827 Instruction Manual

The left side of Figure 4-8 displays the internal circuitry while the right side displays possible field wiring.

Note: All I/O modules are isolated on the field side. Be aware that you can

induce ground loops by tying commons from various modules together.

6.6KW

1 2 3 4 5 6 7 8

M O C

DRY CONTACT

ROC800 POWERED

OPEN COLLECTOR

OPEN DRAIN TYPE DEVIC E

EXTERNALLY POWERED

8 CHAN

DOC0507A

Figure 4-8. Discrete Input Module Field Wiring

4.6 Discrete Output Modules

The five-channel Discrete Output (DO) module provides two-state outputs to energize solid-state relays and power small electrical loads. These are solid-state relays. A Discrete Output may be set to send a pulse to a specified device. Discrete Outputs are high and low outputs used to turn equipment on and off.

DO modules can be software-configured as latched, toggled, momentary, or Timed Duration Outputs (TDO). The DO can be configured to either retain the last value on reset or use a user-specified fail-safe value.

The DO module provides LEDs that light when each output is active. When a request is made to change the state of a DO, the request is

immediately sent to the DO module. There is no scan time associated with a DO. Under normal operating conditions, the DO channel registers the change within 2 milliseconds.

If the DO is in momentary or toggle mode, you can enter a minimum timeon of 4 milliseconds.

Figure 4-9 displays the field wiring connections to the output circuit of the DO module.

Issued Mar-06 Input/Output Modules 4-10

ROC827 Instruction Manual

Caution

The Discrete Output module only operates with non-powered discrete devices, such as relay coils or solid-state switch inputs. Using the module with powered devices may cause improper operation or damage.

DO modules draw power for the active circuitry from the backplane, and are fused for protection against excessive current.

Note: When using the Discrete Output module to drive an inductive load

(such as a relay coil), place a suppression diode across the input terminals to the load. This protects the module from the reverse Electro-Motive Force (EMF) spike generated when the inductive load is switched off.

Representative Internal Circuit

CONTROL

COM

Field Wiring

DISCRETE DEVICE

EXTERNALLY POWERED

5 CHAN

DOC0508A

Figure 4-9. Discrete Output Module Field Wiring

Note: All I/O modules are isolated on the field side. Be aware that you can induce ground loops by tying commons from various modules together.

4.7 Discrete Output Relay Modules

The five-channel DO Relay (DOR) module provides LEDs that light when each output is active. DOR modules use dual-state latching relays to provide a set of normally open, dry contacts capable of switching 2 A at 32 Volts dc across the complete operating temperature. You can configure the module as latched, toggled, momentary, or Timed Duration Outputs (TDO). The DOR can either retain the last value on reset or use a userspecified fail-safe value.

Figure 4-10 displays the field wiring connections to the output circuit of the DO Relay module.

Issued Mar-06 Input/Output Modules 4-11

CONTROL

ROC827 Instruction Manual

Note: The Discrete Output Relay module operates only with discrete

devices having their own power source. When a request is made to change the state of a DOR, the request is

immediately sent to the DOR module. There is no scan time associated with a DOR. Under normal operating conditions, the DOR channel registers the change within 12 mSecs. If the DOR is in momentary or toggle mode, DOR channels register the change within 48 mSecs.

The DOR modules draw power for the active circuitry from the backplane.

Note: On power up or reset, the DO Relay module’s LEDs enter

indeterminate state for a few seconds as the module self-identifies. The LEDs may flash, stay on, or stay off for a few seconds.

-YDO

RELA

DISCRETE DEVICE

SELF- POWERED

DISCRETE DEVICE

EXTERNALLY POWERED

LATCHING RELAY NOTE: S = SET

R = RESET

H C

2 H

3 H

H C

5 H

5 CHAN

DOC0509A

Figure 4-10. Discrete Output Relay Module Field Wiring

Note: All I/O modules are isolated on the field side. Be aware that you can

induce ground loops by tying commons from various modules together.

4.8 Pulse Input Modules

The Pulse Input (PI) module provides two channels for measuring either a low speed or high speed pulse signal. The PI module processes signals from pulse-generating devices and provides a calculated rate or an accumulated total over a configured period. Supported functions are slowcounter input, slow rate input, fast counter input, and fast rate input.

Issued Mar-06 Input/Output Modules 4-12

Caution

ROC827 Instruction Manual

The PI is most commonly used to interface to relays or open collector/open drain type solid-state devices. The Pulse Input can be used to interface to either self-powered or ROC827-powered devices.

The high speed input supports signals up to 12 kHz while the low speed input is used on signals less than 125 Hz.

You can configure the PI module as either 12 or 24 Volts dc using jumper J4 on the I/O module (see Figure 4-11). The PI modules can provide isolated +12 Volt dc or +24 Volt dc field transmitter power on a permodule basis. For example, one module can provide +12 Volt dc power, while another module in the same ROC827 can provide +24 Volt dc power. Refer to Figures 4-12 and 4-13.

The PI module provides LEDs that light when each input is active.

The Pulse Input module only operates with non-powered devices, such as “dry” relay contacts or isolated solid-state switches. Use of the PI module with powered devices may cause improper operation or damage.

The PI modules draw power for the active circuitry from the backplane. Input signals are optically isolated.

Note: Do not connect wiring to both the Low and High speed selections

for a given channel. This results in unpredictable operation of the PI module.

+T 12 / 24 V dc Jumper

Figure 4-11. Pulse Input J4 Jumper (Set to +12 V)

Issued Mar-06 Input/Output Modules 4-13

ROC827 Instruction Manual

Representative Internal Circuit

Field Wiring

OPEN DRAIN TYPE

12KHz PI FILTER & LEVEL DETECTION

DOC0510A

OPEN COLLECTOR DEVICE

EXTERNALLY POWERED

CONTACT-CLOSURE DEVICE

EXTERNALLY POWERED

Figure 4-12. Externally Powered Pulse Input Module Field Wiring

Representative Internal Circuit

12KHz PI FILTER & LEVEL DETECTION

1 H

M O C

2 H

M O C

Field Wiring

OPEN COLLECTOR

OPEN DRAIN TYPE DEVICE

ROC800 POWERED

METER COIL

Figure 4-13. ROC800-Powered Pulse Input Module Field Wiring

Note: All I/O modules are isolated on the field side. Be aware that you can

induce ground loops by tying commons from various modules together.

4.9 RTD Input Modules

The Resistance Temperature Detector (RTD) module monitors the temperature signal from an RTD source. The module can accommodate input from a two-, three-, or four-wire RTD source.

The active element of an RTD probe is a precision, temperature-dependent resistor made from a platinum alloy. The resistor has a predictable positive temperature coefficient, meaning its resistance increases with temperature.

T +

2 CHAN

DOC0511A

Issued Mar-06 Input/Output Modules 4-14

The RTD input module works by supplying a small consistent current to

the RTD probe and measuring the voltage drop across it. Based on the voltage curve of the RTD, the ROC827 firmware converts the signal to temperature.

The RTD input module monitors the temperature signal from a resistance temperature detector (RTD) sensor or probe. A two-channel 16-bit RTD module is available. The RTD module isolation includes the power supply connections.

The RTD modules draw power for the active circuitry from lines on the backplane.

It may be more convenient to perform calibration before connecting the field wiring. However, if the field wiring between the ROC827 and the RTD probe is long enough to add a significant resistance, then perform calibration in a manner that considers this.

4.9.1 Connecting the RTD Wiring

Temperature can be input through the Resistance Temperature Detector (RTD) probe and circuitry. An RTD temperature probe mounts directly to the piping using a thermowell. Protect RTD wires either by a metal sheath or by conduit connected to a liquid-tight conduit fitting. The RTD wires connect to the four screw terminals designated “RTD” on the RTD module.

ROC827 Instruction Manual

The ROC827 provides terminations for a four-wire 100-ohm platinum RTD with a DIN 43760 curve. The RTD has an alpha equal to 0.00385 or

0.00392Ω/Ω°C. You can use a two-wire or three-wire RTD probe instead of a four-wire probe, but they may produce measurement errors due to signal loss on the wiring.

Wiring between the RTD probe and the ROC827 must be shielded wire, with the shield grounded only at one end to prevent ground loops. Ground loops cause RTD input signal errors.

Table 4-1. RTD Signal Routing

Signal Terminal Designation

CH 1 (REF) 1 Constant Current +

CH 1 (+) 2 V+ RTD CH 1 (–) 3 V– RTD

CH 1 (RET) 4 Constant Current –

Not Connected 5

CH 2 (REF) 6 Constant Current +

CH 2 (+) 7 V+ RTD CH 2 (–) 8 V– RTD

CH 2 (RET) 9 Constant Current –

Not Connected 10 N/A

Issued Mar-06 Input/Output Modules 4-15

ROC827 Instruction Manual

Note: All I/O modules are isolated on the field side. Be aware that you can

induce ground loops by tying commons from various modules together.

4-Wire RTD

Red Red

3-Wire RTD

Jumper

Red

2-Wire RTD

Figure 4-14. RTD Sensor Wiring Terminal Connections

Figure 4-14 and Table 4-2 display the connections at the RTD terminals for the various RTD probes.

Jumper

Table 4-2. RTD Wiring

Terminal 4-Wire RTD 3-Wire RTD 2-Wire RTD

REF Red Jumper to + Jumper to +

+ Red Red, Jumper to REF Red, Jumper to REF – White White White, Jumper to RET

RET White White Jumper to –

Note: The wire colors for the RTD being used may differ.

4.10 J and K Type Thermocouple Input Modules

The five-channel J and K Type Thermocouple Input module monitors either J or K Type Thermocouple (T/C). J and K refer to the type of material used to make a bimetallic junction: Type J (Iron/Constantan) and Type K (Chromel/Alumel). These dissimilar junctions in the thermocouple junction generate different millivolt levels as a function of the heat to which they are exposed.

The J and K Type Thermocouple Input module measures the voltage of the thermocouple to which it is connected. The T/C voltage is measured and a Cold Junction Compensation (CJC) correction factor is applied to compensate for errors due to any voltage inducted at the wiring terminals

Issued Mar-06 Input/Output Modules 4-16

Caution

ROC827 Instruction Manual

by the junction between the different metal of the T/C wiring and the T/C module’s terminal blocks.

Note: The use of dissimilar metals is not supported. It will not provide the

correct results, as CJC is applied at the module level. Thermocouples are self-powered and require no excitation current. The

thermocouple modules use integrated short-circuit protected isolated power supplies and completely isolates the field wiring side of the module from the backplane.

If using the Type J above 750°C (1382°F), abrupt magnetic transformation causes permanent de-calibration of the T/C wires.

De-calibration

De-calibration can occur in thermocouple wires. De-calibration is the process of unintentionally altering the makeup of the thermocouple, usually caused by the diffusion of atmospheric particles into the metal at the extremes of the operating temperature range. Impurities and chemicals can cause de-calibration from the insulation diffusing into the thermocouple wire. If operating at high temperatures, check the specification of the probe insulation. It is advised to use thermocouples with insulated junctions to protect against oxidation and contamination.

Thermocouples use thin wire (typically 32 AWG) to minimize thermal shunting and increase response times. Wire size used in the thermocouple depends upon the application. Typically, when longer life is required for the higher temperatures, select the larger size wires. When sensitivity is the prime concern, use smaller size wiring. Thin wire causes the thermocouple to have a high resistance that can cause errors due to the input impedance of the measuring instrument. If thermocouples with thin leads or long cables are required, keep the thermocouple leads short and use a thermocouple extension wire to run between the thermocouple and measuring instrument.

The thermocouple wires directly to the module’s removable terminal block. No special terminal or isothermal block is required.

Issued Mar-06 Input/Output Modules 4-17

ROC827 Instruction Manual

DOC0512B

J OR K THERMOCOUPLE UNGROUNDED SHEATH

Figure 4-15. Type J and K Thermocouple Wiring

Be sure to use the correct type of thermocouple wire to connect the thermocouple to the ROC827. Minimize connections and make sure connections are tight. If you use any dissimilar metals (such as copper wire) to connect a thermocouple to the ROC827, you can create the junction of dissimilar metals that can generate millivolt signals and increase reading errors.

Ensure any plugs, sockets, or terminal blocks used to connect the extension wire are made from the same metals as the thermocouples and observe correct polarity.

The thermocouple probe must have sufficient length to minimize the effect of conduction of heat from the hot end of the thermocouple. Unless there is insufficient immersion, readings will be low. It is suggested the thermocouple be immersed for a minimum distance equivalent to four times the outside diameter of a protection tube or well.

Use only ungrounded thermocouple constructions. Grounded thermocouples are susceptible to the creation of ground loops. In turn, ground loops can cause interaction between thermocouple channels on the thermocouple module.

Note: Use thermocouples as individual sensing devices. All modules are

isolated on the field side. Be aware that you can induce ground loops by tying module-to-module commons together.

Issued Mar-06 Input/Output Modules 4-18

ROC827 Instruction Manual

Noise Susceptibility

Millivolt signals are very small and are very susceptible to noise. Noise from stray electrical and magnetic fields can generate voltage signals higher than the millivolt levels generated from a thermocouple. The T/C modules can reject common mode noise (signals that are the same on both wires), but rejection is not perfect, so minimize noise where possible.

Take care to properly shield thermocouple wiring from noise by separating the thermocouple wiring runs from signals that are switching loads and AC signals. Route wires away from noisy areas and twist the two insulated leads of the thermocouple cable together to help ensure both wires pickup the same noise. When operating in an extremely noisy environment, use a shielded extension cable.

+ –

TypeJus.dsf

Figure 4-16. Type J Thermocouple Shielded

Wiring – United States Color Coding

United States color-coding for the Type J Thermocouple shielded wiring is black sheathing, the positive lead is white, and the negative lead is red.

+ –

TypeKus.dsf

Figure 4-17. Type K Thermocouple Shielded

Wiring – United States Color Coding

Caution

unground.dsf

Figure 4-18. Ungrounded –

Sheathed

United States color-coding for the Type K Thermocouple shielded wiring is yellow sheathing, the positive lead is yellow, and the negative lead is red.

Shielded wiring is recommended. Ground shields only on one end, preferably at the end device unless you have an excellent ground system installed at the ROC800-series controller. Do not tie the thermocouple module to ground.

Note: It is highly recommended that you use shielded wiring.

Sheathed thermocouple probes are available with one of three junction types: grounded, ungrounded, or exposed.

ground.dsf

Figure 4-19. Grounded

exposed.dsf

Figure 4-20. Exposed,

Ungrounded – Unsheathed

In an ungrounded probe, the thermocouple junction is detached from the probe wall. Response time slows down from the grounded style, but the ungrounded probe offers electrical isolation of 1.5 M ½ at 500 Volts dc in all diameters. The wiring may or may not be sheathed.

Issued Mar-06 Input/Output Modules 4-19

ROC827 Instruction Manual

Note: Only ungrounded probes are supported. It is highly recommended

that you use sheathed probes. Use an ungrounded junction for measurements in corrosive environments

where it is desirable to have the thermocouple electronically isolated from and shielded by the sheath. The welded wire thermocouple is physically insulated from the thermocouple sheath by MgO powder (soft).

At the tip of a grounded junction probe, the thermocouple wires physically attach to the inside of the probe wall. This results in good heat transfer from the outside, through the probe wall to the thermocouple junction. Grounded wiring is not supported.

The thermocouple in the exposed junction protrudes out of the tip of the sheath and is exposed to the surrounding environment. This type offers the best response time, but is limited in use to non-corrosive and nonpressurized applications. Exposed junction thermocouples are not supported.

Note: Avoid subjecting the thermocouple connections and measurement

instrument to sudden changes in temperature.

Issued Mar-06 Input/Output Modules 4-20

ROC827 Instruction Manual

4.11 Related Specification Sheets

Refer to the following specification sheets (available at

www.EmersonProcess.com/flow

information on each of the I/O modules.

Table 4-3. I/O Module Specification Sheets

Name Form Number Part Number

AI and AO Modules (ROC800-Series) 6.3:IOM1 D301163X012 DI and PI Modules (ROC800-Series) 6.3:IOM2 D301175X012 DO and DOR Modules (ROC800-Series) 6.3:IOM3 D301181X012 RTD and T/C Modules (ROC800-Series) 6.3:IOM4 D301182X012

) for additional and most-current

Issued Mar-06 Input/Output Modules 4-21

ROC827 Instruction Manual

Issued Mar-06 Input/Output Modules 4-22

Chapter 5 – Communications

This section describes the built-in communications and the optional communication modules used with the ROC827.

In This Chapter

5.1 Communications Ports and Modules Overview.......................................5-1

5.2 Installing Communication Modules..........................................................5-3

5.3 Removing a Communications Module.....................................................5-4

5.4 Wiring Communications Modules............................................................5-5

5.5 Local Operator Interface (LOI).................................................................5-5

5.5.1 Using the LOI.................................................................................5-7

5.6 Ethernet Communications .......................................................................5-7

5.7 EIA-232 (RS-232) Serial Communications..............................................5-9

5.8 EIA-422/485 (RS-422/485) Serial Communications Module.................5-10

5.8.1 EIA-422/485 (RS-422/485) Jumpers & Termination Resistors....5-11

5.9 Dial-up Modem Communications Module..............................................5-12

5.10 Multi-Variable Sensor (MVS) Interface Modules ...................................5-14

5.11 HART Interface Module.........................................................................5-16

5.12 Related Specification Sheets.................................................................5-20

ROC827 Instruction Manual

5.1 Communications Ports and Modules Overview

The built-in communications and the optional communication modules provide communications between the ROC827 and a host system or external devices.

The ROC827 allows up to six communication ports. Three communication ports are built-in on the CPU. You can add up to three additional ports with communication modules. Table 5-1 displays the types of communications available for the ROC827.

Table 5-1. Built-in Communications and Optional Communication Modules

Communications Built-in on CPU Optional Module

EIA-232 (RS-232D) Local Operator Interface (LOI) Local Port Ethernet (use with DS800 Configuration Software) Comm1 EIA-232 (RS-232C) Serial Communications Comm2 Comm3 to Comm5 EIA-422/485 (RS-422/485) Serial Communications Comm3 to Comm5 Modem Communications Comm3 to Comm5 MVS Sensor Interface Comm3 to Comm5

The communication modules consist of a communications module (card), a communications port, wiring terminal block, LEDs, and connectors to the backplane. The ROC827 unit can hold up to three communication modules in the first three module slots. Refer to Figure 5-1.

Issued Mar-06 Communications 5-1

ROC827 Instruction Manual

(

Optional Comm 3

Slot #1)

Optional Comm 3 or Comm 4

LOI (Local Port)

-232 (RS-232D)

Slot #2)

Built-in Ethernet (Comm1)

Built-in EIA-232

(RS-232) (Comm2)

Optional Comm 3 to Comm 5 (Slot #3)

Figure 5-1. Communication Ports

Table 5-2. Communication LED Indicator Definitions

Signals Action

CTS Clear To Send indicates the modem is ready to send.

CD Data Carrier Detect (DCD) indicates a valid carrier signal tone detected.

DSR Data Set Ready for ring indicator communication signal.

DTR Data Terminal Ready to answer an incoming call. When off, a connection disconnects. RTS Ready To Send indicates ready to transmit.

RX Receive Data (RD) signal is being received.

TX Transmit Data (TD) signal is being transmitted.

Each communications module has surge protection in accordance with the CE certification EN 61000. Each communications module is completely isolated from other modules and the backplane, including power and signal isolation, with the exception of the EIA-232 (RS-232) module. The field interface has been designed to protect the electronics in the module. Filtering is provided on each module to reduce communication errors.

Issued Mar-06 Communications 5-2

5.2 Installing Communication Modules

All communication modules install into the ROC827 in the same way. You can install or remove communication modules while the ROC827 is powered up (hot-swappable), you can install modules directly into unused module slots 1, 2, or 3 (hot-pluggable), and modules are self-identifying in the software. All modules are self-resetting after a fault clears.

Note: The dial-up modem module is not hot-swappable or hot-pluggable.

When you install a dial-up modem module, you must remove power from the ROC827.

ROC827 Instruction Manual

Figure 5-2. Example RS-485 Communications Module

Caution

Note: You can install communications modules only in slots 1, 2, or 3 of

the ROC827. Refer to Figure 5-1.

1. Remove the wire channel cover.

Note: Leaving the wire channel cover in play can prevent the module

from correctly connecting to the socket on the backplane.

2. Perform one of the following:

Issued Mar-06 Communications 5-3

ROC827 Instruction Manual

 If there is a module currently in the slot, unscrew the captive

screws and remove that module (refer to “Removing a Communications Module”).

 If the slot is currently empty, remove the module cover.

3. Insert the new module through the module slot on the front of the

ROC827 housing. Make sure the label on the front of the module is facing right side up. Gently slide the module in place until it contacts properly with the connectors on the backplane.

Note: If the module stops and will not go any further, do not force the

module. Remove the module and see if the pins are bent. If so, gently straighten the pins and re-insert the module. The back of the module must connect fully with the connectors on the backplane.

4. Gently press the module into its mating connectors on the backplane

until the connectors firmly seat.

5. Install the retaining captive screws to secure the module.

6. Wire the module (refer to “Wiring Communications Modules”).

Note: All modules have removable terminal blocks for convenient

wiring and servicing. Twisted-pair cable is recommended for I/O signal wiring. The removable terminal blocks accept 12 AWG or smaller wire.

7. For dial-up modem communications, connect the cable to the RJ-11

connector on the communications module.

Note: If you are installing a modem module, it is recommended that

you install a surge protector between the RJ-11 jack and the outside line.

8. Replace the wire channel cover.

9. Connect to ROCLINK 800 software and login. The modules are self-

identifying after re-connecting to ROCLINK 800 software.

5.3 Removing a Communications Module

To remove a communications module:

1. Remove the wire channel cover.

2. Unscrew the two captive screws holding the module in place.

3. Gently pull the module’s lip out and remove the module from the slot.

You may need to gently wiggle the module.

4. Install a new module or install the module cover.

5. Screw the two captive screws to hold the module in place.

Issued Mar-06 Communications 5-4

6. Replace the wire channel cover.

5.4 Wiring Communications Modules

Signal wiring connections to the communications are made through the communications port removable terminal bock connectors and through RJ11 and RJ-45 connectors. All modules have removable terminal blocks for convenient wiring and servicing. The terminal blocks can accommodate a wide range of wire gauges (12 AWG or smaller).

Caution

Failure to exercise proper electrostatic discharge precautions, such as wearing a grounded wrist strap may reset the processor or damage electronic components, resulting in interrupted operations.

To connect the wire to the removable block compression terminals:

1. Bare the end (¼ inch maximum) of the wire.

2. Insert the bared end into the clamp beneath the termination screw.

3. Tighten the screw.

ROC827 Instruction Manual

The ROC827 should have a minimum of bare wire exposed to prevent short circuits. Allow some slack when making connections to prevent strain.

Note: All modules have removable terminal blocks for convenient wiring

and servicing. Twisted-pair cable is recommended for I/O signal wiring. The removable terminal blocks accept 12 AWG or smaller wire.

5.5 Local Operator Interface (LOI)

The Local Operator Interface (LOI) local port provides direct communications between the ROC827 and the serial port of an operator interface device, such as an IBM compatible computer. The interface allows you to access the ROC827 with a direct connection using ROCLINK 800 software to configure and transfer stored data.

The LOI uses the Local Port in ROCLINK 800 software. The LOI terminal (RJ-45) on the CPU provides wiring access to a built-in

EIA-232 (RS-232) serial interface, which is capable of 57.6K baud operation. The RJ-45 connector pin uses the data terminal equipment (DTE) in the IEEE standard.

The LOI port supports ROC Plus and Modbus protocol communications. The LOI also supports the log-on security feature of the ROC827 if you have enabled the Security on LOI in the ROCLINK 800 software.

Table 5-3 shows the signal routing of the CPU connections. Figure 5-3 shows the RJ-45 pin out.

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ROC827 Instruction Manual

Table 5-3. Built-in LOI EIA-232 Signal Routing

Signal LOI Function

DTR

GND

RX Receive 5 Data received by the DTE.

TX Transmit 6 Data sent by the DTE.

RTS Request to Send 8 Originated by the DTE to initiate transmission by the DCE.

Data Terminal

Ready

Ground

(Common)

RJ-45 Pins

on ROC827

Originated by the ROC827 Data Terminal Equipment (DTE) to instruct

the Data Communication Equipment (DCE) to setup a connection. DTE is running and ready to communicate.

Reference ground between a DTE and a DCE and has a value 0 Volts

dc.

Description

Figure 5-3. RJ-45 Pin Out

The LOI terminal requires the installation of a D-Sub 9 pin (F) to RJ-45 modular converter between the ROC827 and personal computer (PC). Refer to Table 5-4.

Table 5-4. RJ-45 to EIA-232 (RS-232) Null-modem Cable Signal Routing

EIA-232

(RS-232)

DTE

4 – 1 1 – 2 6 DTR 3 5 GND 4 3 TX 5 2 RX 6 7 – 7 8 RTS 8

ROC800-

Series

RJ-45 Pins

on ROC800-

Series

Table 5-5. Using Cable Warehouse 0378-2 D-Sub to Modular Converter 9-Pin to RJ-45 Black

1 Blue 4 2 Orange 1 3 Black 6

Wire

Color

RJ-45 Pins

on ROC800-

Series

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ROC827 Instruction Manual

5.5.1 Using the LOI

1. Plug the LOI cable into the LOI RJ-45 connector of the ROC827.

2. Connect the LOI cable to the D-Sub 9 pin (F) to RJ-45 modular

converter.

3. Plug the modular converter into the COM Port of the personal

computer.

4. Launch ROCLINK 800 software.

5. Click the Direct Connect icon.

6. Configure communications for the other built-in and modular

communications, I/O modules, AGA meter parameters, and other configuration parameters.

4 Red 5 5 Green 3 6 Yellow 2 7 Brown 7 8 Gray 8

Wire

Color

RJ-45 Pins

on ROC800-

Series

5.6 Ethernet Communications

The Ethernet communications port in the ROC827 allows TCP/IP protocol communications using the IEEE 802.3 10Base-T standard. One application of this communications port is to download programs from DS800 Development Suite Configuration Software.

The Ethernet communications port uses a 10BASE-T Ethernet interface with an RJ-45 connector. Each Ethernet-equipped unit is called a station and operates independently of all other stations on the network without a central controller. All attached stations connect to a shared media system. Signals are broadcast over the medium to every attached station. To send an Ethernet packet, a station listens to the medium (Carrier Sense) and when the medium is idle, the station transmits the data. Each station has an equal chance to transmit (Multiple Access).

Access to the shared medium is determined by the Medium Access Control (MAC) mechanism embedded in each station interface. The MAC mechanism is based on Carrier Sense Multiple Access with Collision Detection (CSMA/CD). If two stations begin to transmit a packet at the same instant, the stations stop transmitting (Collision Detection). Transmission is rescheduled at a random time interval to avoid the collision.

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ROC827 Instruction Manual

You can link Ethernet networks together to form extended networks using bridges and routers.

Table 5-6. Ethernet Signal LEDs

Signal Function

RX Lit when currently receiving. TX Lit when currently transmitting.

COL Lit when Ethernet Packet Collision detected.

LNK Lit when Ethernet has linked.

Use a rugged industrial temperature HUB when connecting Ethernet wiring in an environment that requires it.

The IEEE 802.3 10BASE-T standard requires that 10BASE-T transceivers be able to transmit over a link using voice grade twisted-pair telephone wiring that meets EIA/TIA Category four wire specifications. Generally, links up to 100 meters (328 feet) long can be achieved for unshielded twisted-pair cable.

For each connector or patch panel in the link, subtract 12 meters (39.4 feet) from the 100-meter limit. This allows for links of up to 88 meters (288 feet) using standard 24 AWG UTP (Unshielded Twisted-Pair) wire and two patch panels within the link. Higher quality, low attenuation cables may be required when using links greater than 88 meters.

The maximum insertion loss allowed for a 10BASE-T link is 11.5 dB at all frequencies between 5.0 and 10.0 MHz. This includes the attenuation of the cables, connectors, patch panels, and reflection losses due to impedance mismatches to the link segment.

Intersymbol interference and reflections can cause jitter in the bit cell timing, resulting in data errors. A 10BASE-T link must not generate more than 5.0 nanoseconds of jitter. If your cable meets the impedance requirements for a 10BASE-T link, jitter should not be a concern.

The maximum propagation delay of a 10BASE-T link segment must not exceed 1000 nanoseconds.

Crosstalk is caused by signal coupling between the different cable pairs contained within a multi-pair cable bundle. 10BASE-T transceivers are designed so that you do not need to be concerned about cable crosstalk, provided the cable meets all other requirements.

Noise can be caused by crosstalk of externally induced impulses. Impulse noise may cause data errors if the impulses occur at very specific times during data transmission. Generally, do not be concerned about noise. If you suspect noise related data errors, it may be necessary to either reroute the cable or eliminate the source of the impulse noise.

Multi-pair, PVC 24 AWG telephone cables have an attenuation of approximately 8 to 10 dB/100 m at 200°C (392°F). The attenuation of PVC insulted cable varies significantly with temperature. At temperatures

Issued Mar-06 Communications 5-8

Emerson ROC827 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual