Rockwell Automation 2085 User Manual

User Manual

Micro800 Discrete and Analog Expansion I/O

Catalog Numbers Bulletin 2085

Important User Information

Solid-state equipment has operational characteristics differing from those of electromechanical equipment. Safety Guidelines for the Application, Installation and Maintenance of Solid State Controls (publication SGI-1.1 available from your local Rockwell Automation sales office or online at http://www.rockwellautomation.com/literature/) describes some important differences between solid-state equipment and hard-wired electromechanical devices. Because of this difference, and also because of the wide variety of uses for solid-state equipment, all persons responsible for applying this equipment must satisfy themselves that each intended application of this equipment is acceptable.

In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the use or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or liability for actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or software described in this manual.

Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation, Inc., is prohibited.

Throughout this manual, when necessary, we use notes to make you aware of safety considerations.

WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous environment, which may lead to personal injury or death, property damage, or economic loss.

ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence

SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous voltage may be present.

BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may reach dangerous temperatures.

IMPORTANT Identifies information that is critical for successful application and understanding of the product.

Allen-Bradley, Rockwell Software, Rockwell Automation, Micro800, Micro850, Connected Components Workbench, and TechConnect are trademarks of Rockwell Automation, Inc.

Trademarks not belonging to Rockwell Automation are property of their respective companies.

Preface

Who Should Use this Manual

Purpose of this Manual

Additional Resources

Read this preface to familiarize yourself with the rest of the manual. It provides information concerning:

•who should use this manual

•the purpose of this manual

•related documentation

•supporting information for Micro800™

Use this manual if you are responsible for designing, installing, programming, or troubleshooting control systems that use Micro800 controllers.

You should have a basic understanding of electrical circuitry and familiarity with relay logic. If you do not, obtain the proper training before using this product.

This manual is a reference guide for Micro800 expansion I/O modules. It describes the procedures you use to install, wire, and troubleshoot your expansion I/O. This manual:

•gives you an overview of expansion I/O features and configuration parameter

•gives you an overview of the Micro800 controller system

Refer to the Online Help provided with Connected Components Workbench™ software for more information about programming.

These documents contain additional information concerning related Rockwell Automation products.

Resource	Description
Micro850 Programmable Controllers Installation	Information on mounting and wiring the
Instructions 2080-IN007	Micro850 24-point Controllers
Micro850 Programmable Controllers Installation	Information on mounting and wiring the
Instructions 2080-IN008	Micro850 48-point Controllers
Micro800 16-point and 32-point 12/24V Sink/	Information on mounting and wiring the
Source Input Modules Installation Instructions	expansion I/O modules (2085-IQ16, 2085-IQ32T)
2085-IN001
Micro800 Bus Terminator Module Installation	Information on mounting and wiring the
Instruction 2085-IN002	expansion I/O bus terminator (2085-ECR)
Micro800 16-Point Sink and 16-Point Source 12/	Information on mounting and wiring the
24V DC Output Modules Installation Instructions	expansion I/O modules (2085-OV16, 2085-OB16)
2085-IN003
Micro800 8-Point and 16-Point AC/DC Relay	Information on mounting and wiring the
Output Modules Installation Instructions	expansion I/O modules (2085-OW8, 2085-OW16)
2085-IN004

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Preface

Resource	Description
Micro800 8-Point Input and 8-Point Output AC	Information on mounting and wiring the
Modules Installation Instructions 2085-IN005	expansion I/O modules (2085-IA8, 2085-IM8,
	2085-OA8)
Micro800 4-channel and 8-channel Analog	Information on mounting and wiring the
Voltage/current Input and Output Modules	expansion I/O modules (2085-IF4, 2085-IF8,
Installation Instructions 2085-IN006	2085-OF4)
Micro800 4-channel Thermocouple/RTD Input	Information on mounting and wiring the
Module 2085-IN007	expansion I/O module (2085-IRT4)
Micro800 RS232/485 Isolated Serial Port Plug-in	Information on mounting and wiring the
Module Wiring Diagrams 2080-WD002	Micro800 RS232/485 Isolated Serial Port Plug-in
	Module.
Industrial Automation Wiring and Grounding	Provides general guidelines for installing a
Guidelines, publication 1770-4.1	Rockwell Automation industrial system.
Product Certifications website, http://ab.com	Provides declarations of conformity, certificates,
	and other certification details.
Application Considerations for Solid-State	A description of important differences between
Controls SGI-1.1	solid-state programmable controller products
	and hard-wired electromechanical devices.
National Electrical Code - Published by the	An article on wire sizes and types for grounding
National Fire Protection Association of Boston,	electrical equipment.
MA.
Allen-Bradley Industrial Automation Glossary	A glossary of industrial automation terms and
AG-7.1	abbreviations.

You can view or download publications at http://www.rockwellautomation.com/ literature/. To order paper copies of technical documentation, contact your local Rockwell Automation distributor or sales representative.

You can download the latest version of Connected Components Workbench for your Micro800 at the URL below.

http://ab.rockwellautomation.com/Programmable-Controllers/Connected-

Components-Workbench-Software.

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Preface

Notes:

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Preface

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	Table of Contents
Preface	Who Should Use this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	iii
	Purpose of this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	iii
	Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	iii
	Chapter 1
Hardware Features	Micro800 Expansion I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 1
	Hardware Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 2
	Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 4
	Chapter 2
Discrete and Analog Expansion	Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 5
I/O Features	Discrete Expansion I/O Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 5
	Discrete Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 5
	Discrete Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 6
	Analog Expansion I/O Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 6
	Analog Input and Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	. 7
	Specialty Module 2085-IRT4 Temperature Input Module . . . . . . .	11
	Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	14
	Chapter 3
Wiring Connections	Input/Output Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	15
	Wiring Options for the 2085-IQ32T Module. . . . . . . . . . . . . . . . . . .	21
	Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	24
	Chapter 4
Install Your Micro800	Mount the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	25
Expansion I/O	Module Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	25
	DIN Rail Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	26
	Panel Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	27
	System Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	27
	Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	28

Configure Your Expansion I/O

Module

Chapter 5

Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Add an Expansion I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Edit Expansion I/O Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Delete and Replace an Expansion I/O Configuration . . . . . . . . . . . . 42

Build, Save, Download a Project with Expansion I/O Configuration. . 44 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44

	Appendix A
Specifications	Discrete Expansion I/O. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	45
	Analog Expansion I/O. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	50
	Specialty Expansion I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .	52

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Table of Contents

Appendix B

Expansion I/O Data Mapping Discrete I/O Data Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Analog I/O Data Mapping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

Specialty I/O Data Mapping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61

Calibration of Analog Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Index

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Chapter 1

Hardware Features

Micro800 Expansion I/O

Modules

Micro850 controllers support a range of discrete and analog expansion I/O modules. You can attach up to four expansion I/O modules, in any combination, to a Micro850 controller, as long as the total number of embedded, plug-in, and expansion discrete I/O points is less than or equal to 132.

The following expansion I/O modules are compatible with Micro850 controllers:

Micro800 Expansion I/O Modules

Catalog	Type	Description
2085-IA8	Discrete	8-point, 120V AC input
2085-IM8	Discrete	8-point, 240V AC input
2085-OA8	Discrete	8-point, 120/240V AC Triac Output
2085-IQ16	Discrete	16-point, 12/24V Sink/Source Input
2085-IQ32T	Discrete	32-point, 12/24V Sink/Source Input
2085-OV16	Discrete	16-point, 12/24V DC Sink Transistor Output
2085-OB16	Discrete	16-point, 12/24V DC Source Transistor Output
2085-OW8	Discrete	8-point, AC/DC Relay Output
2085-OW16	Discrete	16-point, AC/DC Relay Output
2085-IF4	Analog	4-channel, 14-bit isolated(1) voltage/current input
2085-IF8	Analog	8-channel, 14-bit isolated(1) voltage/current input

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Chapter 1 Hardware Features

Micro800 Expansion I/O Modules

Catalog	Type	Description
2085-OF4	Analog	4-channel, 12-bit isolated(1)	voltage/current output
2085-IRT4	Analog	4-channel, 16-bit isolated(1)	RTD and Thermocouple input module
2085-ECR	Terminator	2085 bus terminator

(1) Refers to isolation from field side wiring to controller, not channel-to-channel isolation.

Hardware Features

The bus terminator, 2085-ECR, serves as an end cap and terminates the end of the serial communication bus. It is required whenever an expansion I/O module is connected to the controller and should be connected to the last expansion I/O module in the system.

Micro850 expansion I/O modules come as a single-width (87 x 28 x 90 mm, HxWxD) or double-width (87 x 46 x 90 mm, HxWxD) form factor. See specifications for Expansion I/O on page 240 for information on module dimensions.

Single-width Expansion I/O

2085-OW8 shown			2
1
8	3
	6		3
	7		4
	3		5
		6
	1
5
45307		45308	1

Front view	Right top view

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Hardware Features	Chapter 1

Double-width Expansion I/O
2085-OW16 shown		2
1
	3
	6		3
			4
8
	7
			5
	3	6
9	1		1
45296		45297

	Front view			Right top view
Module Description
	Description				Description
1	Mounting screw hole / mounting foot		6		Bus connector (male/female)
2	Removable Terminal Block (RTB)(1)		7		Latch hooks
3	RTB hold down screws		8		I/O status LED
4	Cable grip		9		DIN rail mounting latch
5	Module interconnect latch

(1)The removable terminal block has slots for mechanical keying, to prevent inadvertently making the wrong wire connections to your module. Expansion I/O modules are shipped with keys.

2085-IQ32T Hardware Features

1	2
	3
6	2
3	4

8

7

5 6

1

9

Right top view

45927

Front view

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Chapter 1 Hardware Features

2085-IQ32T Hardware Components

	Description			Description
1	Mounting screw hole / mounting foot		6	bus connector (male and female)
2	Connector		7	latch hooks
3	Connector retaining arm		8	I/O status LEDs
4	Cable grip		9	DIN rail mounting latch
5	Module interconnecting latch

Summary

This chapter included a brief introduction to the different analog and discrete Micro800 expansion I/O modules and their hardware features.

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Chapter 2

Overview

Discrete Expansion I/O

Features

Discrete and Analog Expansion I/O Features

This section includes a brief description of the different features and configuration parameters for the analog and discrete Micro800 expansion I/O modules. It covers the following topics.

Topic	Page
Discrete Expansion I/O Features	5
Discrete Input	5
Discrete Output	6
Analog Expansion I/O Features	6
Analog Input and Output	7
Specialty Module 2085-IRT4 Temperature Input Module	11

Micro800 discrete expansion I/O modules are input/output modules that provide On/Off detection and actuation.

Module Information

The Connected Components Workbench programming software makes it easy to configure the modules as most module features can be enabled or disabled through the device configuration portion of the software. You can also use the software to check any expansion I/O module in the system to retrieve:

•hardware revision information

•vendor ID

•module information

Channel Status Indicator Information

The discrete expansion I/O modules have yellow status indicators for each input/ output point which indicates the On/Off state of the point.

Discrete Input

Discrete input modules interface to sensing devices and detect whether they are On or Off. These modules convert AC or DC On/Off signals from user devices to appropriate logic level for use within the processor.

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Chapter 2 Discrete and Analog Expansion I/O Features

Analog Expansion I/O

Features

The 2085-IA8, 2085-IM8, 2085-IQ16 and 2085-IQ32T modules update the controller with new data whenever an input point transitions from On to Off and Off to On.

On to Off and Off to On filter times can be adjusted through the Connected Components Workbench software. These filters improve noise immunity within a signal. A larger filter value affects the length of delay times for signals from these modules.

You can select from a series of operational ranges for each channel. The range designates the minimum and maximum signals that are detectable by the module.

Discrete Output

Output modules may be used to drive a variety of output devices. Typical output devices compatible with the outputs include:

•motor starters

•solenoids

•indicators

Follow these guidelines when designing a system.

•Make sure that the outputs can supply the necessary surge and continuous current for proper operation. (See Specifications on page 45 for more information.)

•Make sure that the surge and continuous current are not exceeded. Damage to the module could result. When sizing output loads, check the documentation supplied with the output device for the surge and continuous current needed to operate the device. The Micro800 standard digital outputs are capable of directly driving the Micro800 standard digital inputs.

TIP	User-configurable options are not available in Connected Components
	Workbench for discrete output modules.

IMPORTANT On controller minor and major fault, all output channels are de-energized.

This section pertains to the following Micro800 analog expansion I/O modules:

Micro800 Expansion I/O Modules

Catalog	Type	Description
2085-IF4	Analog	4-channel, 14-bit isolated(1)	voltage/current input
2085-IF8	Analog	8-channel, 14-bit isolated(1)	voltage/current input

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Discrete and Analog Expansion I/O Features Chapter 2

Micro800 Expansion I/O Modules

Catalog	Type	Description
2085-OF4	Analog	4-channel, 12-bit isolated(1)	voltage/current output
2085-IRT4	Analog	4-channel, 16-bit isolated(1)	RTD and Thermocouple input module
2085-ECR	Terminator	2085 bus terminator

(1) Refers to isolation from field side wiring to controller, not channel-to-channel isolation.

Analog expansion I/O modules are interface modules that convert analog signals to digital values for inputs and convert digital values to analog signals for outputs. Controllers can then use these signals for control purposes.

Analog Input and Output

Input/Output Types and Ranges

The 2085-IF4 and 2085-IF8 modules support four and eight input channels, respectively, while the 2085-OF4 supports four output channels. Each of the channels can be configured as current or voltage input/output, with current mode as default configuration.

Input/Output Type/Range for 2085-IF4, 2085-IF8, and 2085-OF4

	Module	Input/Output Type/Range
	2085-IF4	0…20 mA
		4…20 mA (default)
	2085-IF8
		-10…10 V
		0…10 V
	2085-OF4

To use an input or output as a current or voltage device, you must:

•wire the input/output connector for the correct input/output type (see Input/Output Wiring on page 15)

•configure the input/output as current or voltage through Connected Components Workbench (see Configure Your Expansion I/O Module on page 29)

Data formats

This parameter configures each channel to present analog data in any of the following formats:

•Raw/Proportional Data –The value presented to the controller is proportional to the selected input and scaled into the maximum data range allowed by the bit resolution of the A/D converter. For example, the data value range for a ±10V DC user input is -32,768…32,767, which covers the full-scale range of -10.5…10.5V. See Valid Range of the Data Formats for 2085-IF4, 2085-IF8, and 2085-OF4 on page 8.

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Chapter 2 Discrete and Analog Expansion I/O Features

•Engineering Units – The module scales the analog input data to the actual current or voltage values for the selected input range. The resolution of the engineering units is 0.001V or 0.001 mA per count.

•Percent Range – The input data is presented as a percentage of the normal operating range. For example, 0V…10V DC equals 0…100%. The amount over and under the normal operating range (the full-scale range) is also supported.

Valid Range of the Data Formats for 2085-IF4, 2085-IF8, and 2085-OF4

The valid range of each Data Format corresponds to the full range of each Type/

Range (or normal range). For example, the full range of 0…20 mA is 0…21 mA.

Valid Range of the 2085-IF4 and 2085-IF8 Data Formats

Data Format		Type/Range
	0…20 mA(4)	4…20 mA(4)	-10…10V(4)	0…10 V(4)
Raw/Proportional Data(1)		-32768…32767
Engineering Units(2)	0…21000	3200…21000	-10500…10500	-500…10500
Percent Range(3)	0…10500	-500…10625	Not supported	-500…10500

(1)See Convert Analog Value to Data Format Value on page 9.

(2)The resolution is 0.001V or 0.001 mA per count. For example, 9999 here means 9.999V or 9.999 mA (or 9999 x 0.001).

(3)The resolution is 0.01% per count. For example, 9999 here means 99.99% (or 9999 x 0.01%). See Convert Analog Value to Data Format Value on page 9

(4)The full range value of:

a.0…20 mA is 0…21 mA

b.4 to 20 mA is 3.2…21 mA

c.-10…10V is -10.5…10.5V

d.0…10V is -0.5…10.5V

Valid Range of the 2085-OF4 Data Formats

Data Format		Type/Range
	0…20 mA(4)	4…20 mA(4)	-10…10V(4)	0…10V(4)
Raw/Proportional		-32768…32767
Data(1)
Engineering Units(2)	0…21000	3200…21000	-10500…10500	0…10500
Percent Range(3)	0…10500	-500…10625	Not supported	0…10500

(1)See Convert Analog Value to Data Format Value on page 9.

(2)The resolution is 0.001V or 0.001 mA per count. For example, 9999 here means 9.999V or 9.999 mA (or 9999 x 0.001.

(3)The resolution is 0.01% per count. For example, 9999 here means 99.99% (or 9999 x 0.01%). See Convert Analog Value to Data Format Value on page 9.

(4)The full range value of:

a.0…20 mA is 0…21 mA

b.4…20 mA is 3.2…21 mA

c.-10…10V is -10.5…10.5V

d.0…10V is 0…10.5V

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Discrete and Analog Expansion I/O Features	Chapter 2

Convert Analog Value to Data Format Value

The formula for converting an analog value x to a data format value y (or conversely, deriving data format value y to analog value x) is as follows:

Y = ((X - Minimum Value of X Range)*(Range of Y)/(Range of X)) +

(Minimum Value of Y Range)

Example 1:

Find the analog value Y of Type/Range 4…20 mA when the Raw/Proportional

Data X is -20000.

Given:

X = -20000

Minimum value of X Range = -32768

Range of X = 32767 - (-32768) = 65535

Range of Y = 21- 3.2 = 17.8

Minimum value of Y Range = 3.2

Using the conversion formula:

Y = (-20000 - (-32768))*17.8/65535 + (3.2) = 6.668 mA

Example 2:

Find the Raw/Proportional value (Y) of 10 mA (X) for type/range 4…20 mA.

Given:

X = 10 mA

Minimum Value of X Range = 3.2 mA (Minimum value of 4…20 mA)

Range of X = 21 - 3.2 = 17.8 mA (Range of 4…20 mA)

Range of Y = 32767 - (-32768) = 65535 (Range of Raw/Proportional

Data)

Minimum Value of Y Range = -32768. (Min value of Raw/Proportional

Data)

Using the conversion formula:

Y = -7732.15 (decimals are not displayed)

Input Filter

For the input modules, 2085-IF4 and 2085-IF8, the input filter parameter lets you specify the frequency filter type for each channel. Frequency filter type affects noise rejection, as explained below. Select a frequency filter type considering acceptable noise and response time.

Through the Connected Components Workbench software, you can configure input filter as:

•50/60Hz Rejection (default)

•No Filter

•2-Point Moving Average

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Chapter 2 Discrete and Analog Expansion I/O Features

•4-Point Moving Average

•8-Point Moving Average

Noise Rejection

The input modules use a digital filter that provides noise rejection for the input signals.

The moving average filter reduces the high frequencies and random white noise while keeping an optimal step response. (See specifications for Analog Expansion I/O on page 50 for minimum and maximum response times.)

Normal Mode Rejection is better than 40 dB, while Common Mode Rejection is better than 60 dB @ 50/60 Hz, with the 50/60 Hz rejection filters selected. The modules perform well in the presence of common mode noise as long as the signals applied to the user plus and minus input terminals do not exceed the common mode voltage rating (±10 V) of the modules. Improper earth ground may be a source of common mode noise.

Process Level Alarms

Process level alarms alert you when the module has exceeded configured high and low limits for each channel (for input modules, it provides additional high-high and low-low alarms). When the channel input or output goes below a low alarm or above a high alarm, a bit is set in the status words. All Alarm Status bits can be read individually or read through the Channel Status Byte.

For the output module, 2085-OF4, it is possible to latch the alarm status bit when the latch configuration is enabled.

You can configure each channel alarm individually.

Clamping Limits and Alarm

For the output module, 2085-OF4, clamping limits the output from the analog module to remain within a range configured by the controller, even when the controller commands an output outside that range. This safety feature sets a high clamp and a low clamp. Once clamps are determined for a module, any data received from the controller that exceeds those clamps transitions the output to that limit but not beyond the clamp value. It also sets the alarm status bit when the alarm is enabled. It is also possible to latch the alarm status bit when the latch configuration is enabled.

For example, an application may set the high clamp on a module for 8V and the low clamp for -8V. If a controller sends a value corresponding to 9V to the module, the module will only apply 8V to its screw terminals.

You can configure the clamp limit (high/low clamp), the associated alarm, and its latching configuration on a per channel basis.

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Discrete and Analog Expansion I/O Features	Chapter 2

The following table shows the default values of the High/Low Clamps (in the order of low clamp value followed by the high clamp value) for the respective type/range when they are first enabled. You can change these values (within their full range) according to your application.

Default Range of High Clamp/Low Clamp Values

Data Format	0…20 mA	4…20 mA	-10…10V	0…10V
Raw/Proportional Data	-32768, 29647	-29822, 29086	-31207, 31207	-32768, 29647
Engineering Units	0, 20000	4000, 20000	-10000, 10000	0, 10000
Percent Range	0, 10000	0, 10000	Not supported	0, 10000

Specialty Module 2085-IRT4 Temperature Input Module

The 2085-IRT4 module lets you configure a sensor type for each of four input channels that linearizes analog signal into a temperature value.

Sensor Type

The following Thermocouple and RTD sensor types are supported by the 2085-IRT4 expansion I/O module.

Supported Thermocouple Types and mV Range

Sensor Range	Range
B	300…1800 °C	(572…3272 °F)
C	0…2315 °C	(32…4199 °F)
E	-270…1000 °C	(-454…1832 °F)
J	-210…1200 °C	(-346…2192 °F)
K	-270…1372 °C	(-454…2502 °F)
TXK/XK (L)	-200…800 °C	(-328…1472 °F)
N	-270…1300 °C	(-454…2372 °F)
R	-50…1768 °C	(-58…3214 °F)
S	-50…1768 °C	(-58…3214 °F)
T	-270…400 °C	(-454…752 °F)
mV	0…100 mV

Supported RTD Types and Ohms Range

Sensor Range		Range
100	Ω Pt α = 0.00385 Euro	-200…870 °C	(-328…1598 °F)
200	Ω Pt α = 0.00385 Euro	-200…400 °C	(-328…752 °F)
100	Ω Pt α = 0.003916 U.S	-200…630 °C	(-328…1166 °F)
200	Ω Pt α = 0.003916 U.S.	-200…400 °C	(-328…752 °F)

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Supported RTD Types and Ohms Range

Sensor Range	Range
100 Ω Nickel 618	-60…250 °C	(-76…482 °F)
200 Ω Nickel 618	-60…200 °C	(-76…392 °F)
120 Ω Nickel 672	-80…260 °C	(-112…500 °F)
10 Ω Copper 427	-200…260 °C	(-328…500 °F)
Ohms	0…500 Ohms

Data format

You can configure the following data formats for channels 0…3 through the Connected Components Workbench software.

•Engineering Units x 1 – If you select engineering units x 1 as the data format for a Thermocouple and RTD input, the module scales input data to the actual temperature values for the selected Thermocouple/RTD type per Thermocouple/RTD standard. It expresses temperatures in 0.1 °C/° F units. For resistance inputs, the module expresses resistance in 0.1 ohm per count. For mV inputs, the module expresses it in 0.01 mV per count.

•Engineering Units x 10 – For a Thermocouple or RTD input, the module scales input data to the actual temperature values for the selected Thermocouple/RTD type per Thermocouple/RTD standard. With this format, the module expresses temperatures in 1 °C/° F units. For resistance inputs, the module expresses resistance in 1 ohm per count. For mV inputs, the module expresses it in 0.1 mV per count.

•Raw/Proportional Data Format – The value presented to the controller is proportional to the selected input and scaled into the maximum data range allowed by the bit resolution of the A/D converter. For example, the full data value range for a thermocouple type B 300...1800 °C is mapped to -32768...32767. See Convert Analog Value to Data Format Value on page 13 for the conversion method.

•Percent Range – The input data is presented as a percentage of the normal operating range. For example, 0…100 mV equals 0…100% or 300..1800 °C equals 0...100% for thermocouple type B sensor. See Convert Analog Value to Data Format Value on page 13 for the conversion method.

Valid Range of the Data Formats for 2085-IRT4

The following table shows the valid range of the Data Format versus the Data Type/Range for channels 0…3.

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Valid Range of the 2085-IRT4 Data Formats

Data Format	Sensor Type – Temperature			Sensor Type	Sensor Type
	(10 Thermocouples, 8 RTDs)			0…100 mV	0…500 ohms
Raw/Proportional Data(1)		-32768…32767
Engineering Units x 1	Temperature Value(3)	(°C/°F)		0…10000(5)	0…5000(7)
Engineering Units x 10	Temperature Value(4)	(°C/°F)		0…1000(6)	0…500(8)
Percent Range(2)			0…10000

(1)See Convert Analog Value to Data Format Value on page 13.

(2)The resolution is 0.01% per count. For example, 9999 here means 99.99% (or 9999 x 0.01%). See Convert Analog Value to Data Format Value on page 13 for the conversion method.

(3)The resolution is 0.1 °C/°F per count. For example, 999 here means 99.9 °C/°F (or 999 x 0.1 °C/°F). The range depends on the selected sensor type.

(4)The resolution is 1 °C/°F per count. For example, 999 here means 999 °C/°F (or 999 x 1 °C/°F). The range depends on the selected sensor type.

(5)The resolution is 0.01 mV per count. For example, 9999 here means 99.99 mV (or 9999 x 0.01 mV).

(6)The resolution is 0.1 mV per count. For example, 999 here means 99.9 mV (or 999 x 0.1 mV).

(7)The resolution is 0.1 ohm per count. For example, 4999 here means 499.9 ohm (or 4999 x 0.1 ohm).

(8)The resolution is 1 ohm per count. For example, 499 here means 499 ohm (or 499 x 1 ohm).

Convert Analog Value to Data Format Value

The formula for converting an analog value x to a data format value y, or converting data format value y to analog value x, is as follows:

Y = ((X - Minimum Value of X Range)*(Range of Y)/(Range of X)) +

(Minimum Value of Y Range)

Example:

Find the temperature value Y of thermocouple type K when the Raw/

Proportional Data X is -20000.

Given:

X = -20000 (Raw/Proportional Value)

Minimum value of X Range = -32768 (Minimum value of Raw/

Proportional Data)

Range of X = 32767 - (-32768) = 65535 (Range of Raw/Proportional

Data)

Range of Y = 1372 - (-270) = 1642 (Range of Thermocouple K in °C)

Minimum value of Y Range = -270 °C (Minimum value of Thermocouple

K)

Then:

Y = (-20000 - (-32768))*1642/65535 + (-270 °C) = 49.9 °C

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Summary

Temperature Units

Temperature value can be set to °C (default) or °F.

Open circuit response

This parameter defines the response to be taken by the module during an open circuit.

•Upscale – Sets input to full upper scale value of channel data word. The full-scale value is determined by the selected input type, data format, and scaling.

•Downscale – Sets input to full lower scale value of channel data word. The low scale value is determined by the selected input type, data format, and scaling.

•Hold Last State – Sets input to last input value.

•Zero – Sets input to 0 to force the channel data word to 0.

Filter frequency

The 2085-IRT4 module uses a digital filter that provides noise rejection for the input signals. The filter is set by default at 4 Hz. The digital filter provides

-3 dB (50% amplitude) attenuation at a filter frequency of 4 Hz.

The -3 dB frequency is the filter cut-off frequency. The cut-off frequency is defined as the point on the frequency response curve where frequency components of the input signal are passed with 3 dB of attenuation. All input frequency components at or below the cut-off frequency are passed by the digital filter with less than 3 dB of attenuation. All frequency components above the cutoff frequency are increasingly attenuated.

The cut-off frequency for each channel is defined by its filter frequency selection and is equal to the filter frequency setting. Choose a filter frequency so that your fastest changing signal is below that of the filter’s cut-off frequency. The cut-off frequency should not be confused with the update time. The cut-off frequency relates to how the digital filter attenuates frequency components of the input signal. The update time defines the rate at which an input channel is scanned and its channel data word is updated.

A lower filter frequency provides a better noise rejection, but it also increases the update time. Conversely, a higher filter frequency provides a faster update time, but it decreases the noise rejection and effective resolution.

TIP	For quickstart instructions on how to add, configure, delete and replace
	your expansion I/O module, see Configure Your Expansion I/O Module.

This chapter discussed the features of the analog and discrete Micro800 expansion I/O modules.

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Chapter 3

Wiring Connections

Input/Output Wiring

In solid-state control systems, grounding and wire routing helps limit the effects of noise due to electromagnetic interference (EMI).

ATTENTION: Do not wire more than 2 conductors on any single terminal.

Basic wiring of devices to the expansion I/O modules are shown below.

2085-IA8 or 2085-IM8

L1

I-00

I-01

COM

I-02

I-03

120V AC (2085-IA8)

COM

240V AC (2085-IM8)

I-04

I-05

COM

I-06

I-07

COM

L2 45313

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Chapter 3 Wiring Connections

2085-IQ16

I-00	I-08
I-01	I-09
COM0	COM1
I-02	I-10
I-03	I-11
COM0	COM1
I-04	I-12
I-05	I-13
COM0	COM1
I-06	I-14
I-07	I-15
COM0	COM1
Terminal Block 1	Terminal Block 2	-DC (sinking)	45299
		+DC (sourcing)

2085-OA8

L1

O-00

O-01

L1

O-02

O-03

120V / 240V AC

L1

O-04

O-05

L1

O-06

O-07

L1

45314

L2

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