The information in this manual has been checked carefully and is believed to be accurate; however, Opto 22 assumes no
responsibility for possible inaccuracies or omissions. Specifications are subject to change without notice.
Opto 22 warrants all of its products to be free from defects in material or workmanship for 30 months from the
manufacturing date code. This warranty is limited to the original cost of the unit only and does not cover installation, labor, or
any other contingent costs. Opto 22 I/O modules and solid-state relays with date codes of 1/96 or later are guaranteed for life.
This lifetime warranty excludes reed relay, SNAP serial communication modules, SNAP PID modules, and modules that
contain mechanical contacts or switches. Opto 22 does not warrant any product, components, or parts not manufactured by
Opto 22; for these items, the warranty from the original manufacturer applies. These products include, but are not limited to,
OptoTerminal-G70, OptoTerminal-G75, and Sony Ericsson GT-48; see the product data sheet for specific warranty
information. Refer to Opto 22 form number 1042 for complete warranty information.
Wired+Wireless controllers and brains and N-TRON wireless access points are licensed under one or more of the following
patents: U.S. Patent No(s). 5282222, RE37802, 6963617; Canadian Patent No. 2064975; European Patent No. 1142245; French
Patent No. 1142245; British Patent No. 1142245; Japanese Patent No. 2002535925A; German Patent No. 60011224.
Opto 22 FactoryFloor, Optomux, and Pamux are registered trademarks of Opto 22. Generation 4, ioControl, ioDisplay,
ioManager, ioProject, ioUtilities, mistic, Nvio, Nvio.net Web Portal, OptoConnect, OptoControl, OptoDataLink, OptoDisplay,
OptoOPCServer, OptoScript, OptoServer, OptoTerminal, OptoUtilities, PAC Control, PAC Display, PAC Manager, PAC Project,
SNAP Ethernet I/O, SNAP I/O, SNAP OEM I/O, SNAP PAC System, SNAP Simple I/O, SNAP Ultimate I/O, and Wired+Wireless
are trademarks of Opto 22.
ActiveX, JScript, Microsoft, MS-DOS, VBScript, Visual Basic, Visual C++, Windows, and Windows Vista are either registered
trademarks or trademarks of Microsoft Corporation in the United States and other countries. Linux is a registered trademark of
Linus Torvalds. Unicenter is a registered trademark of Computer Associates International, Inc. ARCNET is a registered
trademark of Datapoint Corporation. Modbus is a registered trademark of Schneider Electric. Wiegand is a registered
trademark of Sensor Engineering Corporation. Nokia, Nokia M2M Platform, Nokia M2M Gateway Software, and Nokia 31 GSM
Connectivity Terminal are trademarks or registered trademarks of Nokia Corporation. Sony is a trademark of Sony Corporation.
Ericsson is a trademark of Telefonaktiebolaget LM Ericsson. CompactLogix and RSLogix are trademarks of Rockwell
Automation. Allen-Bradley and ControlLogix are a registered trademarks of Rockwell Automation. CIP and EtherNet/IP are
trademarks of ODVA.
All other brand or product names are trademarks or registered trademarks of their respective companies or organizations.
Thank you for purchasing an Opto 22 Modular M4RTU or M4 I/O Controller. The M4RTU/M4IO
delivers the functionality and robustness of a remote telemetry unit with the power of a distributed
automation system, all in one controller.
The M4RTU/M4IO consolidates two processors on a single processor board. Program control and
host communications are handled by a 32-bit microprocessor, while another processor handles I/O
interfacing and control. This dual-processor board is combined with a digital/analog I/O board, a
3-slot vertical expansion bus board (M4BUS), and a modular power supply into a compact
aluminum extrusion package that can be mounted horizontally or vertically.
A complete line of modular adapter cards is also available, providing a wide range of communication
options.
About this Manual
This reference manual provides complete specifications and instructions to set up and install a
M4RTU or M4 I/O controller. In this manual you’ll find:
Chapter 1, “Introduction”—Product support information as well as general information about
the M4RTU/M4IO, its applications, basic architecture, and hardware diagrams.
Chapter 2, “Quick Start”—A brief explanation of how to quickly get the M4RTU/M4IO up and
running.
Chapter 3, “Installation and Setup”—Detailed descriptions of jumper settings and
communication connections.
Chapter 4, “Software and Firmware”—General software and firmware overviews and
communication procedures.
Chapter 5, “Field Wiring”—Detailed information on digital and analog field wiring, including
examples.
Chapter A, “Troubleshooting”—Tips for resolving problems you may encounter.
M4RTU/M4IO User’s Guide 1
1
Page 8
FOR HELP
NOTE: Email messages and
phone calls to Opto 22
Product Support are
grouped together and
answered in the order
received.
For Help
Chapter B, “Cable and Connector Specifications”—A list of recommended communication
cables and connectors.
Chapter C, “Product Specifications”—A list of specifications for the M4RTU/M4IO.
Chapter D, “Worksheets”—Worksheets that can be used to plan field wiring installation and
power consumption.
If you have problems installing or using the M4RTU or M4 I/O and cannot find the help you need in
this guide or on our website, contact Opto 22 Product Support.
Phone:800-TEK-OPTO (835-6786)
951-695-3080
(Hours are Monday through Friday,
7 a.m. to 5 p.m. Pacific Time)
Fax:951-695-3017
Email:support@opto22.com
Opto 22 website:www.opto22.com
When calling for technical support, be prepared to provide the following information about your
system to the Product Support engineer:
•Software and version being used
•Controller firmware (kernel) version
•PC configuration
•A complete description of your hardware and operating systems, including:
–jumper configuration
–accessories installed (such as expansion daughter cards)
The M4RTU/M4IO combines the features and functions of a Remote Telemetry Unit (RTU) with the
power of a distributed automation system all in a single controller. The M4RTU/M4IO is built to be
deployed in any type of network or remote control environment. The M4RTU/M4IO was designed
specifically for industrial field applications, such as wastewater treatment, well monitoring, tank
farms, substation automation, and gas/petrochemical applications.
The M4RTU/M4IO is fully supported with FactoryFloor, Opto 22’s legacy suite of Windows™ software
for industrial automation customers. FactoryFloor consists of four integrated components:
•OptoControl™, a graphical, flowchart-based development environment for control solutions
•OptoDisplay™, a graphical, multimedia operator interface package
•OptoServer™, a data server that connects the controller network with the PC-based
FactoryFloor network
•Plus OptoConnect™, a drag-and-drop database utility
The M4RTU/M4IO is part of Opto 22’s Modular line of controllers. These units feature a modular
design that incorporates Opto 22’s M4 bus technology (M4BUS). This technology lets customers
tailor their controller and interface hardware to the scale of the project at hand. The M4BUS allows
users to create custom interface configurations by simply plugging in one or more of the modular
interface cards. These open options allow customers to share real-time plant floor data with
telemetry or network-based control and information systems. All modular interface cards for serial
communications or network connectivity are supported as standard selections in the FactoryFloor
software.
CHAPTER 1: INTRODUCTION
The M4RTU/M4IO consolidates two processors on a single processor board. Program control and
host communications are handled by a 32-bit 68020 microprocessor, while a 16-bit 80C196
processor handles I/O interfacing and control. This dual-processor board is combined with a
digital/analog I/O board, a 3-slot vertical expansion bus board (M4BUS), and a modular power
supply into a compact aluminum extrusion package that can be mounted horizontally or vertically.
M4RTU/M4IO User’s Guide3
3
Page 10
OVERVIEW—M4RTU/M4IO REMOTE TELEMETRY UNIT
The M4RTU/M4IO base unit has two serial ports: RS-232 and RS-485/422. The RS-485/422 port can
be used to support I/O expansion using standard Opto 22 digital or analog I/O units. These serial
ports can communicate at up to 115 K baud, and the RS-485/422 port logically supports up to 4,096
remote I/O channels as a remote bus.
The M4RTU/M4IO comes standard with 1 MB of battery-backed RAM and 256 KB of flash memory.
The RAM can be used to store a user’s control strategy (program) and data. The flash memory stores
firmware (an operating system, sometimes called a kernel) and can be used to store a user’s control
strategy permanently. The use of flash technology throughout the M4RTU/M4IO allows the user to
remotely download new firmwares offered by Opto 22. This avoids the need to visit an M4RTU/M4IO
site to download new firmware that offers features required for a given application.
The M4RTU/M4IO base unit accommodates a total of eight digital and four analog Generation 4®
(G4) I/O modules. The G4 digital I/O modules provide optical isolation, come in a variety of DC and
AC voltages, feature an integral status LED as well as fused outputs, and offer an optional integral
automatic/manual diagnostic switch. The G4 analog I/O modules provide both optical and
transformer isolation, eliminating ground loops and channel-to-channel interference. Analog
modules come in a variety of field input and output types, including current loop, voltage,
thermocouple, RTD, ICTD, and TPOs. Analog current modules include the option to power the
current loop, eliminating costly power supplies and wiring.
For safety and convenience, the M4RTU/M4IO has system monitors for temperature, AC operation,
and low battery, and includes such features as a real-time clock and watchdog timers. Removable
connector technology is integrated throughout the unit for easy maintenance and wiring removal.
Expansion options are available for adding I/O channels as well as for communicating with SCADA
systems, industrial PCs, other controllers or intelligent equipment devices.
Available Options
The M4RTU/M4IO accommodates eight digital and four analog G4 I/O modules. For applications
requiring additional I/O modules, the Modular Controller product line includes a Modular Controller
I/O Extender, called the M4RTUX, which connects to the M4RTU/M4IO base unit using an Opto 22
shielded 25-pin M4RTUXCAB cable. The M4RTUX provides an additional eight digital and four analog
I/O channels. With the M4RTUX option connected to the M4RTU/M4IO base unit, up to 24 G4 I/O
modules can be installed. Additional I/O can be connected via an RS-485 serial link.
To accommodate a wide variety of applications, seven power supplies are available for the
M4RTU/M4IO: four wide-input-range DC (12V, 24V, 48V, 125V), two wide-input-range AC (120V,
220V), and one line filter base for connecting user-supplied power supplies. These fuse-protected
power supplies feature input-to-output isolation protection, a built-in EMI filter, and an on/off
switch. They supply enough power to operate the M4RTU/M4IO base unit, three M4BUS expansion
options, and I/O modules for both the base unit and the Modular M4 Controller I/O Extender. They
can also supply the current loop for analog current modules.
4
M4RTU/M4IO User’s Guide
The M4BUS technology provides a variety of communication interface cards. M4RTU/M4IO options
include an Ethernet interface card (M4SENET-100), an ARCNET® interface card (M4SARC), a serial
(RS-232 and RS-422/RS-485) interface card (M4SSER), a fiber optic ARCNET®card (M4SARCF) and a
fiber optic ARCNET® repeater card (M4SARCFR). These open options allow customers to share
Page 11
CHAPTER 1: INTRODUCTION
real-time data with telemetry-based SCADA systems or network-based control and information
systems. The available serial ports communicate at up to 115 K baud. These ports can be used to
support additional I/O units, perform host communications, interface to a modem or transmit data
to and from third-party devices. The Ethernet and ARCNET options enable you to connect the
M4RTU/M4IO to other major system components using plantwide information networks. All
modular interface cards for serial communications or network connectivity are supported as
standard selections in the FactoryFloor software.
Software
M4RTU/M4IO configuration and program development are performed on a PC workstation through
OptoControl, Opto 22’s PC-based graphical flowchart language. OptoControl is easy to learn and
easy to use. Six months after you write an OptoControl program, you can come back to it and
understand it. Four key features of OptoControl are:
•OptoControl’s flowchart programming environment, which provides a precise, graphical view
of your control process.
•OptoControl’s “Strategy Tree,” which provides a tree-like view of your system configuration.
•OptoControl’s animated debugger, which makes it easy to step through your process and see
what’s happening at every point in your control program.
•OptoControl flowcharts, which can be packaged as subroutines to provide extensive code
reusability.
All these tools can be live on your workstation at the same time. OptoControl uses a plain English
command set and a long tagname database that is shared by all FactoryFloor components.
During development of your application, you can download your control strategy to the
M4RTU/M4IO and debug the program using OptoControl debug mode. OptoDisplay, Opto 22’s
operator interface package, uses the same long-tagname database generated by OptoControl when
you develop a graphical display of your process.
OptoControl’s built-in Software Developers Kit (SDK) allows custom software developers a direct
interface to Opto 22 controllers from high level programming languages. OptoControl also provides
open access to the database for third-parties and custom developers through the use of OptoServer.
Using OptoServer, the data server that connects the controller network with the PC-based
FactoryFloor network, you can develop client/server architectures supporting any DDE or OPC aware
third-party applications.
The FactoryFloor software environment supports modems (direct, lease, and radio), two-way dial-up
capability (host to M4RTU/M4IO, M4RTU/M4IO to host), and peer-to-peer communications. It also
supports remote firmware (kernel) downloading to flash memory, remote program downloading
and debugging, and remote data uploading and downloading.
M4RTU/M4IO User’s Guide5
5
Page 12
POSSIBLE APPLICATIONS
Tank Farm
Remote Plant Management
Possible Applications
The M4RTU/M4IO can be used in a wide range of applications, including SCADA, remote,
distributive, stand alone, process control, tooling, communication, data acquisition, and OEM
applications.
The following diagrams depict two common applications for the M4RTU/M4IO: a tank farm and a
remote plant management system. Both applications typically require process control and data
acquisition to be performed remotely.
6
M4RTU/M4IO User’s Guide
Page 13
CHAPTER 1: INTRODUCTION
The M4RTU/M4IO is designed to be easy to configure in a variety of communication configurations,
including modems connected to standard telephone lines, leased lines, radio frequency transceivers,
and direct serial connections to PC hardware, as illustrated below.
M4RTU/M4IO User’s Guide7
7
Page 14
POSSIBLE APPLICATIONS
Integration of M4RTU/M4IO with Expanded I/O
Integration of M4RTU/M4IO with Other Devices
The design of the M4RTU/M4IO is also conducive to integration with Opto 22’s digital and analog I/O
systems as well as with other intelligent equipment devices, such as industrial PCs, additional
M4RTUs or other Opto 22 controllers, subsystem automation gear, wastewater equipment, and
various gas/petrochemical devices.
8
M4RTU/M4IO User’s Guide
Page 15
Basic Architecture
The M4RTU/M4IO consolidates two processors on a single processor board. Program control and
host communications are handled by a 32-bit 68020 microprocessor, while a 16-bit 80C 196
processor handles I/O interfacing and control. This dual-processor board is combined with a
digital/analog I/O board, a 3-slot vertical expansion bus board (M4BUS), and a modular power
supply into a compact aluminum extrusion package that can be mounted horizontally or vertically.
A block diagram of the M4RTU/M4IO is shown below.
CHAPTER 1: INTRODUCTION
The two-processor architecture allows the main processor to off-load onto the I/O processor such
tasks as counting, frequency and pulse measurement, latching, totalizing, time proportional output
control, pulse generation, linearization, ramping, engineering unit conversion, averaging, peak and
valley measurement, PID control, and event/reactions, to name a few. I/O control can continue even
if the main processor fails or needs to be reset.
Sophisticated reset circuitry and watchdog timer capability permit a user to develop intelligent,
robust error recovery.
Finally, the M4BUS lays the foundation for intelligent coprocessor daughter cards, which have the
capability to interface to various industry hardware and software protocols without degrading
overall real-time performance.
M4RTU/M4IO User’s Guide9
9
Page 16
HARDWARE DIAGRAMS
Hardware Diagrams
M4RTU/M4IO Base Unit Overview
The following diagram shows the basic components of the M4RTU/M4IO as viewed from the end of
the unit with the expansion slot and serial connector.
The following diagram shows the basic components of the M4RTU/M4IO as viewed from the end of
the unit with the power supply and M4RTUX expansion connector.
10
M4RTU/M4IO User’s Guide
Page 17
2: Chapter 2
Quick Start
Overview
This chapter provides a brief explanation of how to get the M4RTU/M4IO up and running. You may
need to refer to the OptoControl User‘s Guide for detailed instructions. Also refer to appropriate
chapters in this manual for field wiring and communication setup instructions and diagrams.
A quick start installation consists of the following steps:
1.Unpacking the M4RTU/M4IO and power supply
2.Installing the power supply
3.Connecting the battery
4.Checking configuration jumpers
5.Installing optional expansion daughter cards and/or connecting cable to the I/O extender, as
needed
6.Mounting the M4RTU/M4IO
7.Connecting power
8.Installing I/O modules
9.Connecting to a host PC
10. Verifying communications
Notes for Rev. 2 Controllers
The M4RTU/M4IO controller was re-engineered in June 2007 because older parts were no longer
available. Re-engineered controllers can be recognized by the Rev. 2 sticker on the unit. Please note
the following changes.
•You must use OptoTerm version 4.1b or higher to inspect this controller or install new
firmware. Older versions of OptoTerm will not recognize the controller correctly and may cause
you to install the wrong firmware.
•Firmware version 4.1d or higher is required for any M4RTU/M4IO with the Rev. 2 sticker.
•The Rev. 2 controller has 1 MB RAM and 1MB Flash memory, so upgrades are not necessary.
•Rev 2. controllers do not support the obsolete Ethernet daughter cards M4SENET-U and
M4SENET-C. Use the current M4SENET-100 Ethernet card with these controllers.
M4RTU/M4IO User’s Guide 11
11
Page 18
1. UNPACKING
1. Unpacking
Remove the M4RTU/M4IO from its packaging, making sure the M4RTU/M4IO and the following
components are included:
Bag of extra jumpersCan be installed as M4RTU/M4IO configuration jumpers
Two RS-485/RS-232 7-position connectorsConnect wiring to serial ports
Component: Use:
Connector key disk, containing six connector keys
Mounting template
CD
Customer update sheetContains latest product information
Prevents non-keyed connectors from plugging into the serial port
Serves as a guide for preparing a mounting site for the
M4RTU/M4IO
Contains OptoControl and Cyrano firmware (kernels), plus OptoTerm, a utility used to download OptoControl firmware.
IMPORTANT: Earlier versions of OptoTerm (4.0 or lower) cannot recognize M4RTU/M4IO controllers manufactured after June
2007. Make certain you use OptoTerm 4.1 or higher to communicate with these M4RTU/M4IO controllers.
Note: If any of the above items is missing or damaged, contact Opto 22 immediately at 1-800-321-6786.
The M4RTU/M4IO requires a power supply, packaged separately. The following table lists input
power and frequency specifications for the power supplies currently available.
Power Supply
Part Number
M4PS12D12 VDC ((–15 V)n/a
M4PS24D24 VDC (18–30 V)n/a
M4PS48D48 VDC (36–60 V)n/a
Input VoltageFrequency
12
M4PS125D125 VDC input (94–156 V)n/a
M4PS120A120 VAC input (95–130 V)47–63 Hz
M4PS240A240 VAC (190–250 V)47–63 Hz
M4PSF
M4RTU/M4IO User’s Guide
Line Filter; requires 24 VDC
and 5 VDC
n/a
Page 19
2. Installing the Power Supply
1.Place the M4RTU/M4IO on a flat surface with the top cover containing the I/O module
connectors facing up, and orient the M4RTU/M4IO as shown below.
CHAPTER 2: QUICK START
2.Unplug the removable power connector from the power supply. Slide the power supply into
the cavity of the M4RTU/M4IO until it seats firmly against the power supply 32-pin DIN
connector.
3.Use the four screws provided to fasten the power supply from the underside of the
M4RTU/M4IO.
4.Secure the power supply end cap to the end of the M4RTU/M4IO using the four screws
provided. Use the 8-32 x 1/2 screws on the front and the 4-40 x 1/4 screws on the sides.
5.Plug the power connector back into the power supply through the controller’s end cap.
M4RTU/M4IO User’s Guide13
13
Page 20
3. CONNECTING THE BATTERY
3. Connecting the Battery
To save battery power, the M4RTU/M4IO backup battery is not connected at the factory. You will
need to connect it yourself.
1.Remove the four corner screws on the top cover of the M4RTU/M4IO, and remove the top cover.
2.Attach the battery connection wire to the battery connection labeled J2. The red wire connects
to the positive lead.
NOTE: This 3.6-volt lithium backup battery features a shelf life of up to 10 years and an operational life of
two to five years. The Battery Service Record adjacent to the J2 battery connection includes the Opto 22
part number of the battery (G4BATT32), the date the battery was installed, and the date the battery
should be replaced (five years after installation). If the M4RTU/M4IO is subjected to temperature extremes,
you should replace the battery after as little as two years.
To comply with Factory Mutual section 3.2.7, replacement of the lithium battery must be done by the
factory. Contact Opto 22 Product Support for assistance.
14
M4RTU/M4IO User’s Guide
Page 21
4. Checking Configuration Jumpers
The M4RTU/M4IO configuration jumpers are already configured by the factory for connection to a
host PC using the M4RTU’s COM0 RS-232 serial port, set at a baud rate of 38.4 Kbps. The
M4RTU/M4IO’s default address is 1and the default communication mode is binary. Refer to the
diagram below for the default configuration of all jumpers.
CHAPTER 2: QUICK START
If you need to change the factory defaults, see “Setting Configuration Jumpers and Switches” on
page 24. For a chart of address jumper configurations, see page 25.
5. Installing Daughter Cards and/or I/O Extender
If you have purchased optional expansion daughter cards for the M4RTU/M4IO, you will now need to
install them. Refer to the appropriate document listed below for detailed installation instructions:
•M4SSER—see M4 Serial Adapter Card Data Sheet (form 664)
•M4SARC—see M4 ARCNET Adapter Data Sheet (form 631)
•M4SARCF/M4SARCFR—see M4 ARCNET Adapter Fiber Optic Data Sheet and M4 ARCNET
Repeater Fiber Optic Data Sheet (form 673)
•M4SENETU/M4SENETC—see M4SENETC and M4SENETU Data Sheet (form 718)
•M4SENET-100—see M4 Controller Ethernet Card Data Sheet (form 1154)
•M4DUALARC—see M4DUALARC Data Sheet (form 990)
In addition, if you have purchased the M4RTUX I/O Extender, it is advisable to install the M4RTUXCAB
extender cable after installing daughter cards, but before mounting the M4RTU/M4IO. See Opto 22
Modular Controller I/O Extender Data Sheet (form 671) for detailed instructions.
M4RTU/M4IO User’s Guide15
15
Page 22
6. MOUNTING THE M4RTU/M4IO
6. Mounting the M4RTU/M4IO
You can affix the M4RTU/M4IO to any enclosure or panel, either vertically or horizontally, using the
mounting flanges shown in the diagram below and user-supplied 1/4-20 screws.
1.Determine panel mounting site and orientation (horizontal or vertical). Be sure to allow room
for external connectors.
2.Tape the supplied mounting template onto the M4RTU/M4IO panel and prick-punch mounting
locations.
3.Remove template and drill preliminary pilot holes, then drill and tap (or drill through holes) for
1/4-20 screws.
4.Place M4RTU/M4IO onto mounting site and fasten with 1/4-20 screws or screw and nut
assemblies.
16
M4RTU/M4IO User’s Guide
Page 23
7. Connecting Power to the M4RTU/M4IO
Once you have mounted the M4RTU/M4IO, you are ready to connect power to the unit.
CHAPTER 2: QUICK START
1.Turn off the power supply switch. Unplug the power supply connector if desired.
2.Turn the power terminal screws counterclockwise to make sure all power supply terminal block
connections are completely open.
3.Prepare each power supply wire, being careful not to strip back the insulation too far.
4.Insert each wire into the appropriate terminal block location and tighten by turning the power
terminal screw clockwise. Make sure the terminal block is clamping the wire and not the
insulation.
5.If you removed the power supply connector, plug it back in. Tighten the power connector
locking screws.
M4RTU/M4IO User’s Guide17
17
Page 24
8. INSTALLING I/O MODULES
8. Installing I/O Modules
CAUTION:TURN OFF POWER to the M4RTU/M4IO before installing or removing I/O modules.
The M4RTU/M4IO board, located at the top of the unit just below the top cover, accommodates
eight digital and four analog G4 input/output modules. The placement for these modules is shown
below.
To install I/O modules, you do not need to remove the top cover unless you will be changing field
wiring at the same time.
Install each digital or analog module as follows:
1.Choose the appropriate location on the M4RTU/M4IO board and carefully line up the I/O
module pins with the sockets on the I/O board.
2.Press the module firmly into place until it seats all the way down on the I/O board.
3.Use a Phillips screwdriver to tighten the screw and secure the I/O module.
For field wiring, see Chapter 5, “Field Wiring,”on page 45.
18
M4RTU/M4IO User’s Guide
Page 25
9. Connecting to a Host PC
Wiring
IMPORTANT: Serial port connectors wired for other Opto 22 controllers may not be compatible with the
M4RTU/M4IO. Use the M4RTU/M4IO connectors provided and refer to the diagrams in this manual for
wiring information.
For additional wiring options, see page 32 and following.
RS-232 Pin Connections
The following diagram shows the pin positions for the M4RTU/M4IO COM0 serial port:
CHAPTER 2: QUICK START
Refer to the table below to determine the function of each COM0 pin connection.
PinCOM0
1Data Carrier Detect (DCD)
2Transmit (TX)
3Receive (RX)
4Request-to-Send (RTS)
5Clear-to-Send (CTS)
6Data Terminal Ready (DTR)
7Ground (GND)
RS-232 Wiring Scheme
Use the default host port (COM0) of the M4RTU/M4IO to connect to the host PC. Follow the diagram
below to wire the M4RTU/M4IO RS-232 serial port to the serial connector on the PC. Verify that the
M4RTU/M4IO User’s Guide19
19
Page 26
9. CONNECTING TO A HOST PC
pin connections at the host PC are the same as those called out in the diagram. See Appendix B,
“Cable and Connector Specifications,” for a list of recommended cables.
IMPORTANT: If RTS and CTS are not used, be sure to connect RTS to CTS on the M4RTU/M4IO as shown
below.
Configuring Communication
Communications between the host PC and the M4RTU/M4IO must be configured using the
graphical flowchart language OptoControl, which must be installed on the PC. For details, consult
the OptoControl User’s Guide.
To configure communications between the PC and M4RTU/M4IO, do the following:
1.Make sure configuration jumpers and switches are set.
2.Cycle the M4RTU/M4IO power by flipping the power switch off and then on.
20
M4RTU/M4IO User’s Guide
Page 27
3.Open OptoTerm.
If you are using a controller with a Rev. 2 sticker, see “Notes for Rev. 2 Controllers” on page 11.
4.Configure a controller in OptoTerm with the communication settings that correspond to your
configuration. Consult the OptoControl User’s Guide for more information.
10. Verifying Communications
To verify communications between the M4RTU/M4I/O and the host PC, use the OptoTerm utility,
which is included with FactoryFloor. In OptoTerm, highlight the controller to communicate with, and
then select VIEW and then STATUS from the menu bar. If the PC can successfully communicate with
the M4 controller, a window will pop up on the PC screen and display information about the M4
controller, for example, the M4 controller’s firmware (kernel) version, the name of the current
strategy, and the controller’s current date and time. If the communication is working correctly, the
time should be updated every one or two seconds, which can be verified by observing the seconds
portion of the time field.
If you have not established successful communications between the two devices:
CHAPTER 2: QUICK START
•Make sure you powered down and powered up the M4RTU/M4IO after changing any
configuration jumpers. Refer to Chapter 3, “Installation and Setup,” to verify wiring connections
and jumper settings.
•Check PC hardware and the physical connection between the M4RTU/M4IO and the PC.
•If you are using a controller with a Rev. 2 sticker, see “Notes for Rev. 2 Controllers” on page 11.
M4RTU/M4IO User’s Guide21
21
Page 28
10. VERIFYING COMMUNICATIONS
22
M4RTU/M4IO User’s Guide
Page 29
3: Chapter 3
Installation and Setup
Overview
This chapter expands upon the quick start information in Chapter 2 with additional information for
installing and configuring the M4RTU/M4IO:
•Setting configuration jumpers and switches page 24
•Connecting field wiringpage 30
•Connecting to a host PC or modempage 32
•Connecting to Opto 22 I/Opage 37
•LED Indicatorspage 39
M4RTU/M4IO User’s Guide 23
23
Page 30
SETTING CONFIGURATION JUMPERS AND SWITCHES
This diagram shows the location of 18 of the
M4RTU/M4IO jumpers. To access these jumpers,
remove the top cover of the M4RTU/M4IO by
removing the four corner screws. Note that a sticker
affixed to the underside of the cover summarizes the
function of these jumpers.
Setting Configuration Jumpers and Switches
The M4RTU/M4IO includes jumpers and switches that allow you to configure the M4RTU/M4IO
based on your individual application requirements. This section describes these configuration
jumpers and switches.
I/O Board Jumpers
The following table shows all I/O board jumpers. When a jumper is installed, the setting
corresponding to the “In” position is in effect. When a jumper is not installed, the setting
corresponding to the “Out” position is in effect. Jumpers are described in the following pages.
24
M4RTU/M4IO User’s Guide
Page 31
CHAPTER 3: INSTALLATION AND SETUP
M4RTU/M4IO Board Jumpers (factory defaults are highlighted)
Jumper(s)DescriptionPositionSetting
E/REEPROM/RAM
AutoAutoboot
X0Communication
X1Boot Loader
H0, H1Host Port
InRun from RAM
OutRun from EEPROM
InAutoboot enabled
OutAutoboot disabled
InBinary
OutASCII
InBoot to kernel
OutBoot to loader
HOH1
InInCOM0
OutInCOM1
InOutARCNET
OutOutEthernet
0123
OutInInIn115.2 KBd
In Out InIn76.8 KBd
OutOutInIn57.6 KBd
Baud 0–3Baud Rate
Address 0–7Address Bits
InInOutIn38.4 KBd
OutInOutIn19.2 KBd
InOutOutIn9600 Bd
OutOutOutIn4800Bd
InInInOut2400 Bd
OutInInOut1200 Bd
InOutInOut600 Bd
Out OutInOut300 Bd
Bit 0 In1
Bit 1 In2
Bit 2 In4
Bit 3 In8
Bit 4 In16
Bit 5 In32
Bit 6 In64
Bit 7 In128
M4RTU/M4IO User’s Guide25
25
Page 32
SETTING CONFIGURATION JUMPERS AND SWITCHES
EEPROM/RAM Jumper (E/R)
Use this jumper to choose the source of the M4RTU/M4IO’s control program. When the jumper is in
(the default), the control program will run from RAM; when the jumper is out, the control program is
copied from Flash EEPROM into RAM and run from RAM.
Normally, application programs are downloaded from your PC workstation to battery-backed CMOS
RAM in the M4RTU/M4IO. The programs are then executed from RAM. Unless application programs
are stored in Flash EEPROM, the E/R jumper should be installed to allow the control program in RAM
to run.
Autoboot Jumper (AUTO)
Use this jumper to determine whether autoboot mode will be enabled (jumper in) or disabled
(jumper out, the default).
When autoboot mode is enabled, at power-up the M4RTU/M4IO automatically executes the resident
user program (RAM or Flash). Otherwise, it waits to receive a command to run the resident program.
Communication Mode Jumper (X0)
Use this jumper to select whether communication between the host computer and the controller
will be in binary mode (jumper in, the default) or ASCII mode (jumper out). Generally, ASCII mode is
used in applications requiring a modem. For ARCNET or Ethernet this jumper is ignored. For more
detailed information, refer to the OptoControl Command Reference Manual — Communications
Overview.
Boot Loader Jumper (X1)
Use this jumper to set the controller to either boot to the downloaded firmware, or kernel (jumper in,
the default) or boot to loader (jumper out). This jumper should always remain in place for normal
operations. See Appendix A, “Troubleshooting,” for more information.
Host Port Jumpers (H0, H1)
Use these jumpers to determine the primary host port used by the M4RTU/M4IO upon power-up or
reset. Select from COM0 (both jumpers in, the default), COM1 (H0 jumper out, H1 jumper in),
ARCNET (H0 jumper in, H1 jumper out), or Ethernet (both jumpers out).
COM0 is dedicated for RS-232 communications and COM1 is dedicated for RS-485 communications.
Select ARCNET only if an optional M4SARC, M4SARCF, or M4SARCFR ARCNET expansion card is
installed. Select Ethernet only if an optional M4SENET-100 expansion card is installed.
Baud Rate Jumpers (BAUD 0–3)
Use these jumpers to set the baud rate for the host serial port (COM0 or COM1) on power-up or
reset. Select the appropriate jumper settings based on the baud rates in Table 3-2. (These baud rates
also appear on the sticker on the underside of the M4RTU/M4IO’s top cover.) The default baud rate is
38.4 Kbps.
Note that if an optional ARCNET or Ethernet expansion card is installed and ARCNET or Ethernet is
configured as the host, the baud rate jumper settings are irrelevant.
26
M4RTU/M4IO User’s Guide
Page 33
CHAPTER 3: INSTALLATION AND SETUP
Use the Configure Controllers - Setup Controller Ports dialog box in OptoControl to set the baud rate
for any M4RTU/M4IO serial port that is not being used as the primary host port. Consult the
OptoControl User’s Guide for more information.
Address Jumpers (ADDRESS 0–7)
Use these jumpers to select an 8-bit address from one to 255 (one to FF hexadecimal). The factory
default is one (jumper zero in, all others out). The most significant bit is seven and the least
significant bit is zero; address zero is reserved and should not used. The following diagram shows the
jumper configurations for all addresses.
Ring Indicator Jumper (JP1 )
NOTE: For newer M4RTU/M4IO base units only, which are identified by a Rev. 2 sticker on the unit. If you
have a Rev. 1 base unit, see the next section,“Processor Board Jumpers for Rev. 1 Units” .
By default, this jumper is installed, establishing a ground on COM0 Pin 7 of the M4RTU/M4IO base
unit. The jumper should remain installed under most circumstances. For the location of JP1, see the
illustration below.
If you need an extra programmable RS-232 input (such as a ring indicator), remove this jumper.
Since this will eliminate the ground on COM0, it will be necessary to wire your RS-232 device ground
to COM1 Pin 3 to prevent common mode problems and resulting damage.
M4RTU/M4IO User’s Guide27
27
Page 34
SETTING CONFIGURATION JUMPERS AND SWITCHES
Ring indicator
selection jumper
on Rev. 2 board
(JP1)
Rev. 2 M4RTU/M4IO
Processor Board Jumpers for Rev. 1 Units
NOTE: For earlier M4RTU/M4IO base units only. For Rev. 2 units, see the previous section, “Ring Indicator
Jumper (JP1 )” .
Four additional jumpers are located on the main processor board, as shown below.
The following table describes the use and default settings of all jumpers for Rev. 1 M4RTU/M4IO base
units. When a jumper is installed, the setting corresponding to the In position is in effect. When a
jumper is not installed, the setting corresponding to the Out position is in effect. The factory defaults
are indicated in bold.
J u m p e r Description Position Setting
FLEPROM Type
MJ RAM Size
RJEPROM Size
JP2Ring Indicator
InUV EPROM (not used)
OutFlash EEPROM
* In2 x 1 Mb (256 KB)
* Out 2 x 4 Mb (1 MB)
In
Out
InCOM0 Pin 7 is ground
Out
1 Mb Flash EEPROM
(256 KB)
4 Mb Flash EEPROM
(1 MB)
(Opto 22 P/N
M4RTUF1M)
COM0 Pin 7 is ring
indicator
Locations of jumpers and chips on a Rev. 1 M4RTU/M4 I/O:
28
M4RTU/M4IO User’s Guide
Page 35
CHAPTER 3: INSTALLATION AND SETUP
RAM size jumper (RJ)
RAM size jumper (MJ)
Flash / UV
EEPROM selection
jumper (FL)
Ring indicator
selection jumper on
Rev. 1 board (JP2)
Rev. 1 M4RTU/M4IO
Each jumper is described below.
Flash Jumpers (FL)
FL identifies the TYPE of firmware EPROMS (either FLASH or UV EPROMS). FL removed indicates
FLASH EPROMS. FL installed indicates UV EPROMS. The default setting is for this jumper to be
removed. All M4RTU/M4 I/O controllers have FLASH EPROMS, so this jumper should NEVER be
installed.
*RAM Jumper (MJ)
MJ identifies the AMOUNT of RAM installed (and hence the TYPE of RAM chips). MJ installed
indicates 256 KB (Kbytes) which is in the form of 2 chips that are 1 megabit each. MJ removed
indicates 1 MB (megabyte) which is in the form of 2 chips that are 4 megabits each. If the
M4RTU/M4 I/O has a “1 MB RAM Installed” sticker, the default setting is for this jumper to be
removed. If the M4RTU/M4 I/O does not have this sticker, the default setting is for this jumper to be
installed.
ROM Jumper (RJ)
RJ identifies the AMOUNT of EPROM memory installed (and hence the TYPE of EPROM chips) or vice
versa. RJ installed indicates 256 KB (Kbytes) which is in the form of 2 chips that are 1 megabit each.
RJ removed indicates 1 MB (megabyte) which is in the form of 2 chips that are 4 megabits each. The
default setting is for this jumper to be installed.
Ring Indicator Jumper (JP2 )
By default, this jumper is installed, establishing a ground on COM0 Pin 7 of the M4RTU/M4 I/O base
unit. The jumper should remain installed under most circumstances.
If you need an extra programmable RS-232 input (such as a ring indicator), remove this jumper.
Since this will eliminate the ground on COM0, it will be necessary to wire your RS-232 device ground
to COM1 Pin 3 to prevent common mode problems and resulting damage.
M4RTU/M4IO User’s Guide29
29
Page 36
CONNECTING FIELD WIRING
Serial Port Switches (COM1)
The M4RTU/M4IO base unit comes standard with one RS-485 serial port COM1. This port includes
configuration switches. The following diagram shows the serial port COM1 switches as they appear
on the end cap of the M4RTU/M4IO. See below for details on configuring these switches.
TERM IN/TERM OUT
This switch selects termination for the RS-485 port. In the IN position, the RS-485 lines are
terminated and biased. Terminate the port when it is physically the first or last unit in an RS-485
multi-drop serial network application.
In the OUT position, the RS-485 lines will be floating. This setting should be used when the port is
part of a multi-drop serial network application and is not physically the first or last unit in the
network. The default is TERM IN.
2-WIRE/4-WIRE
This switch selects the wiring method used to connect to the RS-485 serial port. The choices are
2-wire and 4-wire. The default is 4-wire. If you are using COM1 as an RS-485 serial link (remote),
select 2-wire mode.
Connecting Field Wiring
To access the field wiring terminals, you will first need to remove the top cover of the M4RTU/M4IO
by removing the four corner screws at the top of the unit.
The pluggable field wiring terminals are located on the top of the M4RTU/M4IO board next to the
corresponding digital or analog channels. These terminals allow field wires to be connected to the
installed I/O modules.
The following diagram shows the location of the terminals on the unit and the layout of the terminal
points as they correspond to each I/O module.
Specific information on wiring digital and analog modules follows. For more detailed wiring
information, refer to Chapter 5, “Field Wiring,”on page 45.
30
M4RTU/M4IO User’s Guide
Page 37
CHAPTER 3: INSTALLATION AND SETUP
Digital Modules
Digital modules have two terminals corresponding to each module. The following diagram shows a
G4IDC5 digital input module in channel zero wired with VIN + on terminal #1 and VIN - on
terminal #2.
M4RTU/M4IO User’s Guide31
31
Page 38
CONNECTING TO A HOST PC OR MODEM
Analog Modules
Analog modules can use up to four terminals per I/O point. The following diagram shows a G4AD6
0-5 VDC analog input module in channel zero wired with VIN - on terminal #2 and VIN + on
terminal #4. Refer to page 50 for wiring other analog modules.
Connecting to a Host PC or Modem
The M4RTU/M4IO features two built-in serial ports, COM0 (RS-232) and COM1 (RS-485), with a data
transfer rate of 300 Bd to 115.2 Kbps. Two additional serial ports are available by installing an
optional M4SSER serial expansion card into one of the M4RTU/M4IO expansion card slots.
IMPORTANT: Serial port connectors wired for other Opto 22 controllers may not be compatible with the
M4RTU/M4IO. Use the M4RTU/M4IO connectors provided and refer to the diagrams in this manual for
wiring information.
The following sections describe wiring for the serial ports found on the M4RTU/M4IO base unit.
32
M4RTU/M4IO User’s Guide
Page 39
CHAPTER 3: INSTALLATION AND SETUP
RS-232 COM0 Pin Connections
The M4RTU/M4IO has one built-in RS-232 COM0 serial port.The following table describes COM0
pins.
PinCOM0
1Data Carrier Detect (DCD)
2Transmit (TX)
3Receive (RX)
4Request-to-Send (RTS)
5Clear-to-Send (CTS)
6Data Terminal Ready (DTR)
7Ground (GND)
IMPORTANT: If RTS and CTS are not used, RTS must be connected to CTS (COM0 only) on the
M4RTU/M4IO.
RS-485 COM1 Pin Connections
An RS-485 COM1 port is also built into the M4RTU/M4IO base unit. The following table contains
descriptions for each COM1 pin for both 2-wire and 4-wire modes.
Note that the interrupt lines can be used to add interrupt capability to Opto 22 I/O units connected
to an M4RTU/M4IO via an RS-485 serial link (remote).
PinCOM1 2-Wire ModeCOM1 4-Wire Mode
1Transmit/Receive Plus (TX/RX +)Transmit Plus (TX +)
2Transmit/Receive Minus (TX/RX –)Transmit Minus (TX –)
3Common Ground (GND)Common Ground (GND)
4No Connection (N/C)Receive Plus (RX +)
5No Connection (N/C)Receive Minus (RX –)
6Interrupt Plus (IRQ +)Interrupt Plus (IRQ +)
7Interrupt Minus (IRQ –)Interrupt Minus (IRQ –)
Wiring to a Host PC
This section provides information on wiring connections between an M4RTU/M4IO and a host
personal computer. Examples show connections to a standard PC serial port and an Opto 22 AC37.
Be sure to use cable appropriate to your application. See Appendix B, “Cable and Connector
Specifications,” for a complete list of recommended cables.
M4RTU/M4IO User’s Guide33
33
Page 40
CONNECTING TO A HOST PC OR MODEM
RS-232 COM0
Make RS-232 communication connections to a host PC by using the RS-232 COM0 default host
connector on the M4RTU/M4IO.
The following diagram shows how to connect the M4RTU/M4IO to the serial port of a host PC. Verify
that the pin connections at the host PC are the same as those called out in the diagram.
Important: If RTS and CTS are not used, RTS must be connected to CTS (COM0 only) on the M4RTU/M4IO,
as shown below.
RS-485 COM1
4-Wire Mode Using an AC37. If you are using an Opto 22 AC37, connect the end of the cable with a
male 9-pin D-shell connector to the converter and the other end with a pluggable terminal block to
the M4RTU/M4IO. The following diagram shows how to wire to a host PC in 4-wire mode using an
AC37.
34
M4RTU/M4IO User’s Guide
Page 41
CHAPTER 3: INSTALLATION AND SETUP
2-Wire Mode Using an AC37. The AC37 also supports a 2-wire mode. See the following diagram
for wiring.
Wiring to a Modem (a DCE device)
Refer to your modem documentation for detailed wiring information, possible jumper configuration,
and initialization setup.
Most standard external PC modems can be usd with the M4RTU/M4IO. However, a custom (or
special) communications cable must be used between the modem and the M4RTU/M4IO. Wiring
diagrams for this cable are shown below.
M4RTU/M4IO User’s Guide35
35
Page 42
CONNECTING TO A HOST PC OR MODEM
Computer (DTE) RS-232 COM Port Pin Assignments
RS-232 25-pin
PinNameAbbreviation
1Protective Ground--
2Transmitted DataTD
3Received DataRD
4Request to SendRTS
5Clear to SendCTS
6Data Set ReadyDSR
7Signal Common--
8Data Carrier DetectDCD
20Data Terminal ReadyDTR
22Ring IndicatorRI
36
M4RTU/M4IO User’s Guide
Page 43
RS-232 9-pin
PinNameAbbreviation
1Data Carrier DetectDCD
2Received DataRD
3Transmitted DataTD
4Data Terminal ReadyDTR
5Signal Ground--
6Data Set ReadyDSR
7Request to SendRTS
8Clear to SendCTS
9Ring IndicatorRI
Connecting to Opto 22 I/O Units
CHAPTER 3: INSTALLATION AND SETUP
The built-in RS-485 COM1 port can be used as a serial link (remote) to communicate with Opto 22
digital or analog I/O. A M4SSER serial expansion card installed in the M4RTU/M4IO can also be used
for this purpose.
One method for doing this is to use a Mistic 200 I/O Remote Interface board (G4IOR) as illustrated
below. This method allows the use of Opto 22 I/O equipment (G4 panels, cables, etc.).
This diagram shows a 2-wire RS-485 shielded connection from COM1 on the M4RTU/M4IO to the
G4IOR Remote Interface board. Connect Pin 1 (TX/RX+) to G4IOR “TH+,” Pin 2 (TX/RX-) to G4IOR
“TH-,” and Pin 3 to “COM.” If you are using the interrupt lines, connect Pin 6 to “IRQ+” and Pin 7 to
“IRQ-.”
M4RTU/M4IO User’s Guide37
37
Page 44
CONNECTING TO OPTO 22 I/O UNITS
Communications to a Remote Interface (G4IOR)
Another method for using the RS-485 COM1 port as an RS-485 serial link (remote) is to use Opto 22
I/O units installed with an SBTA, as illustrated in the following diagram. This allows you to
accommodate your own installation practices, application requirements, and cables. Simply mount
your I/O units throughout your installation and daisy chain communication cable between them.
Refer to the Mistic 200 Systems Installation Guide for more SBTA details.
38
M4RTU/M4IO User’s Guide
Page 45
CHAPTER 3: INSTALLATION AND SETUP
Opto 22 I/O Units Installed with SBTA
LED Indicators
Five LEDs are located on the top of the M4RTU/M4IO, in line with the configuration jumpers, as
shown below. These LEDs perform the functions displayed in the table on the following page.
M4RTU/M4IO User’s Guide39
39
Page 46
LED INDICATORS
LEDIndicationDetails
Light ON: Normal function
RUN Processor status
Light OFF: Processor powered down.
Light blinking: Processor malfunction or low power supply voltage.
TX0COM0 transmit
RX0COM0 receive
TX1COM1 transmit
RX1COM1 receive
Light ON: COM0 transmitting serial data
Light OFF: Port is idle, wiring problem, or CTS is low.
Light ON: COM0 receiving serial data
Light OFF: Port is idle or wiring problem exists.
Light ON: COM1 transmitting serial data
Light OFF: Port is idle or wiring problem exists.
Light ON: COM1 receiving serial data
Light OFF: Port is idle or wiring problem exists.
40
M4RTU/M4IO User’s Guide
Page 47
4: Chapter 4
Software and Firmware
Overview
This chapter provides information on using OptoControl, OptoDisplay, and OptoServer with the
M4RTU/M4IO. OptoControl is used to program and debug M4RTU/M4IO control strategies.
OptoDisplay is used to create M4RTU/M4IO process operator interfaces running on the PC.
OptoServer allows the user to construct complex client/server architectures running multiple
OptoDisplay sessions, DDE-aware applications (such as Microsoft Excel), or third-party software
packages with OptoServer driver capability. The tight integration between OptoControl,
OptoDisplay, and OptoServer not only makes all three software packages easy to use, it also prevents
multiple database entry errors, allows tag name validation, and takes full advantage of the
M4RTU/M4IO’s hardware capabilities.
OptoControl
The sophisticated firmware of both the main and I/O processors of the M4RTU/M4IO, along with
flash technology, enables a user to update the M4RTU/M4IO remotely with a new set of operating
systems for the main and I/O processors. The firmware also supports the ability to store a user’s
strategy permanently into flash memory.
Note: It is not the intent of this chapter to teach OptoControl programming and debugging, OptoDisplay
configuration and runtime operation, or overall OptoServer usage. Instead, this chapter presents an
overview of these topics, with enough details to get you started. For detailed information on these
subjects, refer to the appropriate Opto 22 user guides.
OptoControl is used to configure communications between the PC and the M4RTU/M4IO, configure
the I/O units and points, and develop and run your control strategy.
Configuring Communications to the M4RTU/M4IO
To download OptoControl strategies to the M4RTU/M4IO and debug them, you must first configure
the communication link between the host PC and the M4RTU/M4IO. Begin by deciding what type of
physical communication link will be used (ARCNET, RS-232, RS-485/422, or Ethernet). Next, install
M4RTU/M4IO User’s Guide 41
41
Page 48
OPTOCONTROL
and configure communication hardware between the host PC and the M4RTU/M4IO. (Refer to the
appropriate PC and M4RTU/M4IO documentation for communication hardware installation details.)
Once the hardware has been installed, OptoControl must be configured to communicate over the
physical communication link. Refer to the OptoControl User’s Guide to configure PC communications
to the M4RTU/M4IO.
Configuring the M4RTU/M4IO and M4RTUX
Before writing OptoControl strategies for the M4RTU/M4IO, you must inform OptoControl about the
I/O installed on or connected to the M4RTU/M4IO and, if applicable, the M4RTUX.
OptoControl must know how the I/O units are connected to a controller (that is, via the parallel I/O
bus [local] or RS-485 serial link [remote]) as well as what type of module will be installed into each
I/O channel on each unit. Once OptoControl has this information, you may use the assigned I/O tag
names to reference the I/O within an OptoControl strategy.
Note that the multifunction digital I/O unit (M4RTU/M4IO digital I/O) is addressed as 0 and the
multifunction analog I/O unit (M4RTU/M4IO analog I/O) is addressed as 1 on the parallel I/O bus
(local). Since there is no external local bus on the M4RTU/M4IO, these are the only two valid local bus
addresses. These addresses are important during I/O configuration within OptoControl.
Configuring M4RTU/M4IO and M4RTUX I/O Units
The first step in configuring I/O is adding the I/O units. Follow the procedure listed in the OptoControl
User’s Guide to add an I/O unit. For the digital unit, the Type is G4 Digital Multifunction, the Port is
Local, and the Address is 0. For the analog unit, the Type is G4 Analog Multifunction , the Port is
Local, and the Address is 1. Remember that the digital I/O on the M4RTUX is on the same unit as the
digital I/O on the M4RTU/M4IO, and the analog I/O on the M4RTUX is on the same unit as the analog
I/O on the M4RTU/M4IO.
Configuring Additional I/O Units
Your system may have additional I/O units connected via the RS-485 serial link. Follow the procedure
listed in the OptoControl User’s Guide to add an I/O unit. For the configuration of these units, the Port
is Remote 1, 2, or 3 depending on where the I/O is located. The Type and Address will depend on the
hardware used and the jumper settings.
42
M4RTU/M4IO User’s Guide
Page 49
CHAPTER 4: SOFTWARE AND FIRMWARE
Configuring the I/O Points
Follow the procedure listed the OptoControl User’s Guide to add an I/O point. Notice that the
Configure I/O Points dialog box shows 16 analog channels even though the M4RTU/M4IO and
M4RTUX together support a maximum of only eight analog channels. This is because the
M4RTU/M4IO electronics does not support the analog extender capability of an analog
multifunction I/O unit. Simply ignore analog channels 8 through 15 of the Configure I/O Points
dialog box.
Storing User Strategies into M4RTU/M4IO Flash EEPROM
User OptoControl strategies may be stored into flash memory instead of residing in RAM backed up
by a battery. Flash memory has the same robust attributes of EEPROM for remote installations.
Strategies may be developed for the M4RTU/M4IO in RAM, remotely downloaded and debugged,
and then stored remotely in flash memory. If the M4RTU/M4IO has been set up to boot
automatically from flash memory, the OptoControl strategy stored in flash will be executed upon
power-up.
To store an OptoControl strategy into flash memory, refer to the OptoControl User’s Guide.
To configure the M4RTU to run the program automatically from flash, see “EEPROM/RAM Jumper
(E/R)” on page 26.
OptoDisplay and OptoServer
Both OptoDisplay and OptoServer share the database generated by OptoControl. This database
contains the configuration information for communicating to the M4RTU/M4IO and referencing any
strategy data items, such as variables, I/O, PIDs, and event/reactions. This information is used by
OptoDisplay to dynamically drive a given graphic’s attributes. It is also used by OptoServer to
M4RTU/M4IO User’s Guide43
43
Page 50
UPDATING THE M4RTU/M4IO FIRMWARE
communicate to an M4RTU/M4IO or an Opto 22 Controller Network of M4RTU/M4IOs and other
Opto 22 controllers.
To attach OptoDisplay or OptoServer to an M4RTU/M4IO (or to an Opto 22 Controller Network
containing M4RTU/M4IOs), follow the standard procedures outlined in the OptoDisplay and
OptoServer online help or user’s guides for adding controllers. In short, you will be telling
OptoDisplay and OptoServer which OptoControl database to open to access the communication
information and strategy data items.
For more details regarding OptoDisplay and OptoServer, refer to the OptoDisplay User’s Guide and OptoServer User’s Guide.
Updating the M4RTU/M4IO Firmware
Use the OptoTerm utility, included on the CD with this controller, to update the firmware. For details
on using OptoTerm, consult online help or the OptoControl User’s Guide.
IMPORTANT: If your M4RTU/M4IO controller was manufactured in June 2007 or later, it will have a
Rev. 2 sticker. For Rev. 2 controllers, make sure you use OptoTerm version 4.1b or higher (included on the
CD that came with the controller) to update firmware. Older versions of OptoTerm will not recognize the
unit accurately. For more information, see “Notes for Rev. 2 Controllers” on page 11.
44
M4RTU/M4IO User’s Guide
Page 51
5: Chapter 5
Field Wiring
Overview
This chapter provides detailed information on digital and analog field wiring for the M4RTU/M4IO
and M4RTUX. It includes examples of how to wire all currently-available G4 digital and analog I/O
modules. (If a particular module is not represented, please contact Opto 22 Product Support (see
page 2.)
The M4RTU/M4IO and M4RTUX, shown on the following pages, use pluggable screw-style terminal
blocks for field wiring. This type of terminal block gives you the advantages of both a terminal block
and a connector. Terminal blocks furnish a robust individual wire attachment, while connectors
enable quick multi-wire disconnection. Hence, the pluggable screw-style terminal blocks provide
easy installation of field wiring and easy removal of the M4RTU/M4IO and M4RTUX, should the need
arise.
A bused four-position pluggable terminal block is provided on both the M4RTU/M4IO and M4RTUX.
This bused terminal block is located between the two field wire terminal blocks and can be used to
bus user power or commons. It is not connected to any power source or ground plane on the
M4RTU/M4IO or M4RTUX.
The terminal blocks for each unit reside under a cover, preventing removal without the use of a tool.
When attaching field wiring, make sure that the M4RTU/M4IO is off and that field wiring is not
powered, especially in hazardous environments. Field wiring should be properly prepared for
terminal block installation, it should be accurately labeled, and it should be neatly dressed. Allow for
adequate service loops in all field, power, and communication wiring.
If you will be connecting the M4RTU/M4IO to additional I/O units via the RS-485 serial link (remote),
refer to the Mistic 200 Systems Installation Guide and the Mistic 200 Family Data Book.
M4RTU/M4IO User’s Guide 45
45
Page 52
OVERVIEW
Locations of Terminals
on M4RTU/M4IO
Showing Logical
Representation of
Modules
Locations of Terminals
on M4RTUX Showing
Logical Representation
of Modules
46
M4RTU/M4IO User’s Guide
Page 53
Field Wiring Terminals
The M4RTU/M4IO and M4RTUX field wiring terminals are located at the top of each unit, next to their
corresponding digital and analog channel locations. Together, the M4RTU/M4IO and M4RTUX
represent a full complement of 16 digital and 8 analog channels, equivalent to the number of
channels on a standard set of one digital and one analog brick. (Although the M4RTU/M4IO
electronics can support a full complement of digital and analog channels, the unit does not have
enough space to support these channels; hence the need for the M4RTUX I/O Extender.)
Look at the diagrams on the previous page, and note that although the I/O channels on the
M4RTU/M4IO and the M4RTUX are labeled identically, these channels actually represent different
modules logically. On the M4RTU/M4IO, the digital channels labeled 0–7 and the analog channels
labeled 0–3 correspond correctly to digital modules 0–7 and analog modules 0–3, while on the
M4RTUX, the channels with the same labels correspond logically to digital modules 8–15 and
analog modules 4–7.
Each digital channel has two terminals, and each analog channel has four terminals. As with the I/O
channels themselves, the terminals corresponding to these channels are also labeled identically on
the M4RTU/M4IO and M4RTUX, even though they represent different terminal connections.
Therefore, on the M4RTU/M4IO, the terminals labeled 1–16 correspond correctly to terminal
connections 1–16, while on the M4RTUX, these terminals correspond logically to terminal
connections 17–32.
CHAPTER 5: FIELD WIRING
The diagrams on the previous page show the location of the digital and analog channels, as well as
their corresponding terminals for both the M4RTU/M4IO and M4RTUX. Also see Appendix D,
“Worksheets,” for field wiring worksheets.
For additional wiring and module specification information, refer to the Mistic 200 Systems
Installation Guide and the Mistic 200 Family Data Book.
M4RTU/M4IO User’s Guide47
47
Page 54
CONNECTING FIELD WIRING
Connecting Field Wiring
To connect field wiring to the M4RTU/M4IO and M4RTUX terminals, follow the diagram and
procedures below.
1.Access the field wiring terminals by removing the four corner screws at the top of the
M4RTU/M4IO or M4RTUX and removing the top cover.
2.Refer to the appropriate section in this chapter for the specific model of G4 digital or analog
module for which wiring will be connected. Also, refer to Appendix D, “Worksheets,” for a field
wiring worksheet.
3.Ensure that each terminal is completely open by turning the captive screw counterclockwise
until it stops.
4.Insert each wire into the appropriate terminal block location and tighten by turning the power
terminal screw clockwise. Make sure the terminal block is clamping the wire and not the
insulation.
48
M4RTU/M4IO User’s Guide
Page 55
Wiring Digital Modules
Each digital I/O channel has two terminals corresponding to each installed digital module. Terminals
1 and 2 correspond to a module in channel 0, terminals 3 and 4 correspond to a module in channel
1, and so on. For polarized modules, the positive connection goes to the first terminal of the pair and
the negative connection goes to the second. This wiring scheme is identical for the M4RTUX, starting
with channel 8.
Most Input and Output Modules
Use the following diagram to wire the digital DC and AC input and output modules listed below:
CHAPTER 5: FIELD WIRING
DC Inpurt
Modules
G4IDC5
G4IDC5K
G4IDC5D
G4IDC5B
G4IDC5G
G4IDC5MA
AC Input
Modules
G4IAC5
G4IAC5A
G4IAC5MA
DC Output
Modules
G4ODC5
G4ODC5A
G4ODC5MA
G4ODC5R
G4ODC5R5
AC Output
Modules
G4OAC5
G4OAC5A
G4OAC5A5
G4OAC5MA
G4OAC5AMA
For the digital input modules listed above, the input device may be wired to either terminal. The
polarity of the power does not matter except for the G4IDC5K and G4IDC5D.
For the digital output modules listed above, the load may be wired to either line. For DC output
modules used with inductive loads, add a commutating diode (typically a 1N4005) to the circuit as
shown on the channel 6 connection to the M4RTUX.
The diagram shows a DC input module wired to channel 0, an AC input module wired to channel 1,
a DC output module wired to channel 6, and an AC output module wired to channel 7 on the
M4RTU/M4IO.
M4RTU/M4IO User’s Guide49
49
Page 56
WIRING ANALOG MODULES
Quadrature Input Module
Use the following diagram to wire the digital quadrature input module (model G4IDC5Q). The
example shows the module connected to channels 8 and 9 on the M4RTUX.
Note: This module requires two digital channels.
Wiring Analog Modules
Analog modules use up to four terminals per analog I/O channel. The following wiring diagrams
illustrate field wiring schemes for each type of analog I/O module.
Voltage Input and Output Modules
Use the following diagram to wire the analog voltage input or output modules listed in the table
below. The diagram shows a voltage input module wired to channel 0, and a voltage output module
wired to channel 3 on the M4RTU/M4IO.
Use the following diagram to wire the analog milliamp current input or output modules listed in the
table below. The example shows wiring to the M4RTU/M4IO on channels 0 through 3.
The current loop for an input or output current device can be powered either by your own external
supply or by the module. Using the module reduces wiring expense.
Analog mA
Input Modules
G4AD3
Analog mA
Output Modules
G4DA3
G4DA8
M4RTU/M4IO User’s Guide51
51
Page 58
WIRING ANALOG MODULES
0 to 5 Amp AC/DC Current Input or Velocity Input
The 0–5A AC/DC current input module (model G4AD16) can be used to measure current directly or
indirectly through a standard current transformer. Applications include measuring or monitoring
current through a field device such as a motor, solenoid, or lamp.
The velocity input module (model G4AD26) indicates a change in voltage by providing the first
derivative of voltage with respect to time (dV/dt). Typically, potentiometer-based transducers are
attached. An example of an application would be a transducer measuring piston velocity in an
air/hydraulic cylinder.
Use the following diagram to wire these modules. The example shows wiring of the G4AD16 to
channel 0 and the G4AD26 to channel 3 on the M4RTU/M4IO.
52
M4RTU/M4IO User’s Guide
Page 59
CHAPTER 5: FIELD WIRING
Thermocouple Input or ICTD Temperature Input Module
Use the following diagram to wire the analog thermocouple and ICTD temperature input modules
listed in the table below. The example shows a thermocouple input module wired to channel 3 and
an Opto 22 ICTD probe wired to channel 0 on the M4RTU/M4IO.
When wiring thermocouples, verify that you are using the proper polarity and wire color according
to the table below. Also ensure that the wire type from the thermocouple to field terminals is
consistent and does not introduce other thermocouples.
Note: Do not use a cold junction compensator with a G4AD24..
ModelT/C Type
G4AD5Jwhitered
G4AD8Kyellowred
G4AD17Rblackred
G4AD18Tbluered
G4AD19Epurplered
G4AD23Sblackred
G4AD24Bgrayred
Polarity/Color
+–
M4RTU/M4IO User’s Guide53
53
Page 60
WIRING ANALOG MODULES
100-Ohm RTD Input Module
Use the following diagram to wire an analog 100-ohm RTD input module (model G4AD10). Wire
colors may vary, but make sure two wires of the same color are connected as shown. The example
shows a three-wire RTD probe connected to channel 4 and a two-wire RTD connected to channel 7
on the M4RTUX.
For a four-wire RTD probe, do not connect the fourth wire. Connect three wires as shown for the
three-wire RTD example.
For a two-wire RTD probe, add a second wire of the same type and gauge to one end, connecting it
as you would a three-wire RTD. The example shows this type of connection to channel 7 on the
M4RTUX.
54
Rate Module
The rate module (model G4AD20) measures the frequency of an incoming signal and produces a
count based on the number of cycles per second (Hertz). For example, a count value of 1,000
indicates a frequency of 1,000 Hz. This module is ideal for directly reading the frequency of a signal
or a rotating disk for RPM calculations, for example.
The input amplitude range from a transducer generating a square or sine wave can be changed by
adding a jumper to the hookup. Refer to the wiring example connected to channel 4. The square
wave input range changes from 0.5 to 24 V
from 5 to 24 V
Use the following diagram as a guide to wiring the G4AD20 analog rate module. The example shows
the possible wiring options to channels 4 and 7 on the M4RTUX.
M4RTU/M4IO User’s Guide
to 2.5 to 24 V
p-p
p-p
to 0.25 to 24 V
p-p
. The sine wave input range changes
p-p
.
Page 61
CHAPTER 5: FIELD WIRING
Time Proportional Output Module
The time proportional output modules switch either 5–60 VDC (G4DA9) or 12–280 VAC (G4DA10).
Together with power SSRs, they are ideal for temperature control applications, such as heating.
Use the following diagram to wire either of the analog time proportional output modules. The
example shows a G4DA10 wired to channel 3 and a G4DA9 wired to channel 0 on the M4RTU/M4IO.
M4RTU/M4IO User’s Guide55
55
Page 62
WIRING ANALOG MODULES
56
M4RTU/M4IO User’s Guide
Page 63
A: Appendix A
Troubleshooting
M4RTU/M4IO Troubleshooting Chart
IndicationCondition/ProblemAction
RUN LED stays off.Power not applied to processor.Check power supply connections.
RUN light flashes.Not enough power or malfunction.Verify power supply voltage.
RUN LED flashes after a kernel
(firmware) is downloaded or power
failure occurred during EEPROM
firmware installation.
TX0 (COM0 transmit) LED stays off.Port not transmitting.
RX0 (COM0 receive) LED stays off.
Host does not receive a response
from the M4RTU/M4IO, and RX0 or
RX1 (COMO or COM1 receive) LED
flashes communications setup, during program download.
TX1 (COM1 transmit) LED stays off.Port not transmitting.
RX1 (COM1 receive) LED stays off.
M4RTU/M4IO controller cannot
transmit to PC.
Digital output is not working.
Kernel (firmware) is corrupted.
Port is idle.
Wire or connection is bad.
PC to M4RTU/M4IO connections
are incorrect.
Incorrect setup in the OptoControl
controller configurations.
Port is idle.
Wire or connection is bad.
Configuration jumpers were
changed without cycling power.
Wiring to serial port is incorrect.
Bad module fuse.
Wrong module type. Incorrect wiring.
Remove Boot Loader jumper so that M4RTU/M4IO boots
to loader. Reinstall EEPROM firmware, then reinstall Boot
Loader jumper.
Cycle power to unit. Check CTS connection; must be connected to RTS if not used. Check jumper settings and/or
controller communications setup.
Check wiring for polarity transposition.
Check connections at terminals.
Check wiring connections for correct polarity and wire
integrity.
Check controller configurations; specifically baud rate,
address, and binary/ASCII settings.
Cycle power to unit. Check jumper settings and/or controller communications setup.
Check wiring for polarity transposition.
Check connections at terminals.
Cycle power and retry transmission.
Check wiring for possible polarity transposition.
Replace fuse.
Make sure module is 5V (G4ODC5 is correct, G4ODC24 is
incorrect) Match the output module with the load. Use
G4SWOUT module to troubleshoot. If G4SWOUT works,
contact Opto 22 Product Support (see page 2).
Output does not work with
G4SWOUT module installed.
Load does not work with voltage
applied. Output is wired wrong.
Check field wiring worksheets (see Appendix D) and
rewire, if necessary.
M4RTU/M4IO User’s Guide 57
57
Page 64
M4RTU/M4IO TROUBLESHOOTING CHART
IndicationCondition/ProblemAction
Digital input is not working.
Digital input test with G4SWIN module installed.
Analog output is not working.
Analog input is not working.
Input device is not working properly.
Wrong module type.
Voltage on input is not compatible
with module voltage range.
I/O or processor board is bad.
I/O or processor board is bad.Contact Opto 22 Product Support (see page 2).
Output is wired incorrectly. Device
is not properly matched to module
type.
I/O or processor board is bad.
Voltage output device is wired
incorrectly.
Thermocouple has a break.
RTD has open or incorrect wiring.
I/O or processor board is bad.
Check input device wiring and power source. Rewire,
replace, or fix power source as needed.
Make sure module is 5V (for example, [G4IDC5 is correct,
G4IDC24] is incorrect).
Change voltage to match module or module to match voltage.
Use G4SWIN module and OptoControl or G4TEST to send
commands to the M4RTU/M4IO to verify that the processor
board and I/O board are working properly.
Check wiring to output device. Test module using meter
and test software (OptoControl or G4TEST). Change voltage to match module or module to match voltage.
Contact Opto 22 if meter reading does not change with
value change in test software.
Check device and wiring. Connect voltage source or current source (depending on input type) and use test software to determine if input is functioning.
For a thermocouple, check for continuity across test points
next to module.
For an RTD input, check resistance across test points next
to module.
Contact Opto 22 Product Support (page 2) if any of the following occurs:
- If value in test software does not change with input when
testing input voltage or current with test software.
- If thermocouple has continuity across test points.
- If resistance across test points is about 100 ohms for RTD
input.
58
M4RTU/M4IO User’s Guide
Page 65
B: Appendix B
Cable and Connector
Specifications
Serial Communication Cables
The following cables are recommended for both RS-232 and RS-485/422 serial communications.
Although you may elect to use other cables, keep in mind that low capacitance (less than 15 pF/ft.)
is important for high-speed digital communication links. The cables listed below are all 24-gauge,
7x32 stranded, with 100-ohm nominal impedance and a capacitance of 12.5 pF/ft.
Select from the following two-, three-, and four-pair cables, depending on your application needs.
All will yield satisfactory results. It is recommended that you choose a cable with one more pair than
your application requires. Use one of the extra wires, rather than the shield, for the common.
Two-Pair:
•Belden P/N 8102 (with overall shield)
•Belden P/N 9729 (individually shielded)
•Belden P/N 8162 (individually shielded with overall shield)
•Manhattan P/N M3475 (individually shielded with overall shield)
•Manhattan P/N M39249 (individually shielded with overall shield)
Three-Pair:
•Belden P/N 8103 (with overall shield)
•Belden P/N 9730 (individually shielded)
•Belden P/N 8163 (individually shielded with overall shield)
•Manhattan P/N M3476 (individually shielded with overall shield)
•Manhattan P/N M39250 (individually shielded with overall shield)
Four-Pair:
•Belden P/N 8104 (with overall shield)
•Belden P/N 9728 (individually shielded)
•Belden P/N 8164 (individually shielded with overall shield)
•Manhattan P/N M3477 (individually shielded with overall shield)
•Manhattan P/N M39251 (individually shielded with overall shield)
M4RTU/M4IO User’s Guide 59
59
Page 66
M4RTU/M4IO CONNECTORS
M4RTU/M4IO Connectors
The following connectors are included with the M4RTU/M4IO:
Green Pluggable 7-Position Terminal Mini-Plug
•Used for RS-232 and RS-485/422 connections from the M4RTU/M4IO (COM0 and COM1) and
the M4SSER (COM2 and COM3)
•Manufactured by Phoenix Contact (P/N MC1, 5/7-ST-3, 81)
Green Pluggable 3-Position Terminal Plug
•Used for M4RTU/M4IO power connection
•Manufactured by Phoenix Contact (P/N MSTB 2, 5/3-STF-5, 08)
Green Pluggable 16-Position I/O Connector
•Used for wiring from the M4RTU/M4IO and M4RTUX to field application hardware
•Manufactured by Phoenix Contact (P/N MVSTBR 2, 5/16-ST-5, 08)
60
M4RTU/M4IO User’s Guide
Page 67
Appendix C
Product Specifications
M4RTU/M4IO Base Unit Hardware Specifications
ItemSpecification
32-bit Motorola 68020 processor
CPU
CPU clock frequency16.67 MHz
Memory:
RAM
Flash EEPROM on controller
Flash EEPROM on brain board
16-bit 80C196 I/O processor
IEEE floating-point math
1 MB with battery backup (user programs & data)
1 MB (firmware and user programs) in Rev. 2 controllers (256 KB in older ones.)
128 KB (I/O firmware)
Real-time clockClock/calendar, Epson 62421A with battery backup
Power requirements
Typical operating temperature-20 °C to 70 °C
Storage temperature-40 °C to 85 °C
Humidity5% to 95% relative humidity
Software
System monitors:
Host communications
Watchdog timers
RAM battery backup low
Operating temperature
8 digital, 4 analog, multifunction
Adds 8 digital, 4 analog, multifunction
Via RS-485 ports, using Opto 22 I/O
1 RS-232 and 1 RS-485/422 port
Via daughter cards: configurable serial ports, Ethernet, ARCNET
Direct, lease, and radio
5 VDC at 3.5 A (maximum)
24 VDC at 300 mA (maximum)
FactoryFloor (OptoControl, OptoDisplay, and OptoServer)
Classic Software (Cyrano, Mistic MMI, and MDS)
Detect communication errors from processor, I/O, etc.
Detect main power supply operation
Detects program corruption (checksum RAM test)
Detects temperature
M4RTU/M4IO User’s Guide 61
61
Page 68
62
M4RTU/M4IO User’s Guide
Page 69
D: Appendix D
Worksheets
I/O Module Worksheets
The following worksheets can be used to plan I/O module installation for the M4RTU/M4IO base unit
and M4RTUX I/O extender unit.
Fill in the digital or analog I/O type in the box to the right of each I/O channel shown on the
worksheet. The following is an example of a completed worksheet:
M4RTU/M4IO User’s Guide 63
63
Page 70
I/O MODULE WORKSHEETS
* When configuring digital or analog I/O for the M4RTU/M4IO base unit using OptoControl, use these addresses and
make sure the PORT type is LOCAL. See Chapter 4, “Software and Firmware,” for more information.
M4RTU/M4IO Base Unit—I/O Module Worksheet
64
M4RTU/M4IO User’s Guide
Page 71
APPENDIX D: WORKSHEETS
M4RTUX I/O Extender—I/O Module Worksheet
M4RTU/M4IO User’s Guide65
65
Page 72
FIELD WIRING WORKSHEETS
Field Wiring Worksheets
The following worksheets can be used to plan and implement field wiring installation for the
M4RTU/M4IO base unit and M4RTUX I/O Extender.
Fill in the wire name boxes for each terminal. The Field Wiring Worksheet can be used by your
installer during RTU installation. If you need additional worksheets, make copies before filling these
out.
Field Wiring Worksheet 1
66
M4RTU/M4IO User’s Guide
Page 73
Field Wiring Worksheet 2
APPENDIX D: WORKSHEETS
M4RTU/M4IO User’s Guide67
67
Page 74
M4RTU/M4IO POWER CONSUMPTION WORKSHEET INSTRUCTIONS
M4RTU/M4IO Power Consumption Worksheet Instructions
1.On the following worksheet, locate the daughter cards and digital and/or analog modules you
will be using with the M4RTU/M4IO. Enter a quantity for each item in the “Quantity” column.
Also, fill in the quantity and wattage of any RS-232 devices on the line provided.
2.Multiply the value in the “Watts” column by the quantity entered in the “Quantity” column and
enter the result in the “Total” column for each component used.
Example: Eight G4 digital module totals 0.688 W. Four G4ADX analog modules total 6.4 W.
3.Add the values in the “Total” column, including the value entered for the M4RTU/M4IO base
unit, and enter the result on the “Total Watts” line.
Example: 0.688 W (digital modules) + 6.4 W (analog modules) + 7.5 W (base RTU) = 14.588 W.
4.Enter the supplied input voltage for your installation on the “Your supplied input voltage” line.
Example: 24 VDC.
5.Divide the total on the “Total Watts” line by the number entered on the “Your supplied input
voltage” line to calculate your total input current requirements. Enter this number on the last
line of the worksheet.
Example: 14.588 W (total watts)/24 VDC (supplied input) = 0.6 A required input current for the
M4RTU/M4IO.
68
M4RTU/M4IO User’s Guide
Page 75
Power Consumption Worksheet
HardwareWatts (W)Quantity (Q)Total (W X Q)
M4RTU/M4IO Base Unit7.51.07.5
M4RTUX I/O Extender Unit00
Daughter Cards¹
M4SSER1.6
M4SARC1.0
M4SARCF1.1
M4SARCFR1.6
M4SENETC3.1
M4SENETU1.50
M4DUALARC0.7
M4SENET-1004.1
Digital I/O Modules:
APPENDIX D: WORKSHEETS
G4 Digital AC/DC Input/Output²0.086
G4ODC5R, G4ODC5R50.10
G4IDC5Q0.43
Analog I/O Modules:
G4ADX³1.6
G4AD3
Sourcing:
Non-Sourcing:
G4DA4
Sourcing:
Non-Sourcing:
G4DA3, G4DA8
Sourcing:
Non-Sourcing:
G4DA9, G4DA100.18
Powered RS-232 devices (e.g., barcode reader)
Total Watts (TW):_______W
Your supplied input voltage:_______V
TW/Your supplied input voltage = Input Current_______A
2.6
1.6
2.2
1.1
2.6
1.2
1 If the daughter card you are using does not appear above, call Opto 22 for a data sheet
or contact Opto 22 Product Support for wattage specifications.
2 If the digital module you are using does not appear above, use the G4 Digital AC/DC
Input Output module wattage.
3 If the analog module you are using does not appear above, use the G4ADX wattage.
M4RTU/M4IO User’s Guide69
69
Page 76
M4RTU/M4IO POWER CONSUMPTION WORKSHEET INSTRUCTIONS
70
M4RTU/M4IO User’s Guide
Page 77
Index
Numerics
0-5 A current input, 52
2-wire/4-wire
pin connections, 33
switch, 30
A
AC37, 34
Address jumpers, 25, 27
addressing
local I/O, 42
analog I/O
0-5 A current input, 52
ICTD temperature input, 53
installing, 18
milliamp current module, 51
rate module, 54
RTD input, 54
thermocouple input, 53
TPO, 55
velocity input, 52
voltage modules, 50