Rockwell Automation 2085 User Manual
User Manual
Micro800 Discrete and Analog Expansion I/O
Catalog Numbers
Bulletin 2085
Important User Information
IMPORTANT
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
your local Rockwell Automation sales office or online at http://www.rockwellautomation.com/literature/
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.
available from
) describes some
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.
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
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™
Who Should Use this Manual
Purpose of this Manual
Additional Resources
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
Instructions 2080-IN007
Micro850 Programmable Controllers Installation
Instructions 2080-IN008
Micro800 16-point and 32-point 12/24V Sink/
Source Input Modules Installation Instructions
2085-IN001
Micro800 Bus Terminator Module Installation
Instruction 2085-IN002
Micro800 16-Point Sink and 16-Point Source 12/
24V DC Output Modules Installation Instructions
2085-IN003
Micro800 8-Point and 16-Point AC/DC Relay
Output Modules Installation Instructions
2085-IN004
Rockwell Automation Publication 2080-UM003A-EN-E - March 2013 iii
Information on mounting and wiring the
Micro850 24-point Controllers
Information on mounting and wiring the
Micro850 48-point Controllers
Information on mounting and wiring the
expansion I/O modules (2085-IQ16, 2085-IQ32T)
Information on mounting and wiring the
expansion I/O bus terminator (2085-ECR)
Information on mounting and wiring the
expansion I/O modules (2085-OV16, 2085-OB16)
Information on mounting and wiring the
expansion I/O modules (2085-OW8, 2085-OW16)
Preface
Resource Description
Micro800 8-Point Input and 8-Point Output AC
Modules Installation Instructions 2085-IN005
Micro800 4-channel and 8-channel Analog
Voltage/current Input and Output Modules
Installation Instructions 2085-IN006
Micro800 4-channel Thermocouple/RTD Input
Module 2085-IN007
Micro800 RS232/485 Isolated Serial Port Plug-in
Module Wiring Diagrams 2080-WD002
Industrial Automation Wiring and Grounding
Guidelines, publication 1770-4.1
Product Certifications website, http://ab.com Provides declarations of conformity, certificates,
Application Considerations for Solid-State
Controls SGI-1.1
National Electrical Code - Published by the
National Fire Protection Association of Boston,
MA.
Allen-Bradley Industrial Automation Glossary
AG-7.1
Information on mounting and wiring the
expansion I/O modules (2085-IA8, 2085-IM8,
2085-OA8)
Information on mounting and wiring the
expansion I/O modules (2085-IF4, 2085-IF8,
2085-OF4)
Information on mounting and wiring the
expansion I/O module (2085-IRT4)
Information on mounting and wiring the
Micro800 RS232/485 Isolated Serial Port Plug-in
Module.
Provides general guidelines for installing a
Rockwell Automation industrial system.
and other certification details.
A description of important differences between
solid-state programmable controller products
and hard-wired electromechanical devices.
An article on wire sizes and types for grounding
electrical equipment.
A glossary of industrial automation terms and
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/ConnectedComponents-Workbench-Software.
iv Rockwell Automation Publication 2080-UM003A-EN-E - March 2013
Notes:
Preface
Rockwell Automation Publication 2080-UM003A-EN-E - March 2013 v
Preface
vi Rockwell Automation Publication 2080-UM003A-EN-E - March 2013
Table of Contents
Preface
Hardware Features
Discrete and Analog Expansion
I/O Features
Who Should Use this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Purpose of this Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii
Chapter 1
Micro800 Expansion I/O Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Hardware Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Chapter 2
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
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
Install Your Micro800
Expansion I/O
Configure Your Expansion I/O
Module
Input/Output Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Wiring Options for the 2085-IQ32T Module. . . . . . . . . . . . . . . . . . . 21
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Chapter 4
Mount the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Module Spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
DIN Rail Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Panel Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
System Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
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
Rockwell Automation Publication 2080-UM003A-EN-E - March 2013 vii
Discrete Expansion I/O. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Analog Expansion I/O. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Specialty Expansion I/O . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
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
viii Rockwell Automation Publication 2080-UM003A-EN-E - March 2013
Hardware Features
Chapter
1
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
2085-IF8 Analog 8-channel, 14-bit isolated
(1)
voltage/current input
(1)
voltage/current input
Rockwell Automation Publication 2080-UM003A-EN-E - March 2013 1
Chapter 1 Hardware Features
1
1
45308
8
Front view
Right top view
45307
1
2085-OW8 shown
2
5
5
3
3
3
6
4
7
6
Micro800 Expansion I/O Modules
Catalog Type Description
2085-OF4 Analog 4-channel, 12-bit isolated
2085-IRT4 Analog 4-channel, 16-bit isolated
2085-ECR Terminator 2085 bus terminator
(1) Refers to isolation from field side wiring to controller, not channel-to-channel isolation.
(1)
voltage/current output
(1)
RTD and Thermocouple input module
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.
Hardware Features
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
dimensions.
Single-width Expansion I/O
for information on module
2 Rockwell Automation Publication 2080-UM003A-EN-E - March 2013
Double-width Expansion I/O
1
1
45297
8
Front view
Right top view
45296
1
2085-OW16 shown
2
9
5
3
3
3
4
6
7
6
2
1
6
8
7
6
3
1
2
4
5
3
9
45927
Right top view
Front view
Module Description
Hardware Features Chapter 1
(1) The removable terminal block has slots for mechanical keying, to prevent inadvertently making the wrong
2085-IQ32T Hardware Features
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
wire connections to your module. Expansion I/O modules are shipped with keys.
Rockwell Automation Publication 2080-UM003A-EN-E - March 2013 3
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.
4 Rockwell Automation Publication 2080-UM003A-EN-E - March 2013
Chapter
2
Discrete and Analog Expansion I/O Features
Overview
Discrete 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.
Rockwell Automation Publication 2080-UM003A-EN-E - March 2013 5
Chapter 2 Discrete and Analog Expansion I/O Features
TIP
IMPORTANT
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
Analog Expansion I/O Features
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.
User-configurable options are not available in Connected Components
Workbench for discrete output modules.
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
2085-IF8 Analog 8-channel, 14-bit isolated
(1)
voltage/current input
(1)
voltage/current input
6 Rockwell Automation Publication 2080-UM003A-EN-E - March 2013
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
2085-IRT4 Analog 4-channel, 16-bit isolated
2085-ECR Terminator 2085 bus terminator
(1) Refers to isolation from field side wiring to controller, not channel-to-channel isolation.
(1)
voltage/current output
(1)
RTD and Thermocouple input module
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
2085-IF8
2085-OF4
4…20 mA (default)
-10…10 V
0…10 V
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
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.
on
Rockwell Automation Publication 2080-UM003A-EN-E - March 2013 7
Chapter 2 Discrete and Analog Expansion I/O Features
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
Raw/Proportional Data
Engineering Units
Percent Range
• 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.
0…20 mA
(1)
(2)
(3)
0…21000 3200…21000 -10500…10500 -500…10500
0…10500 -500…10625 Not supported -500…10500
(4)
4…20 mA
(4)
-10…10V
-32768…32767
(4)
0…10 V
(4)
(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
Raw/Proportional
(1)
Data
Engineering Units
Percent Range
(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
(2)
0…21000 3200…21000 -10500…10500 0…10500
(3)
0…10500 -500…10625 Not supported 0…10500
(4)
4…20 mA
(4)
-10…10V
-32768…32767
(4)
0…10V
(4)
8 Rockwell Automation Publication 2080-UM003A-EN-E - March 2013
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
Rockwell Automation Publication 2080-UM003A-EN-E - March 2013 9
Chapter 2 Discrete and Analog Expansion I/O Features
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.
• 4-Point Moving Average
• 8-Point Moving Average
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)
Rockwell Automation Publication 2080-UM003A-EN-E - March 2013 11
Chapter 2 Discrete and Analog Expansion I/O Features
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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Discrete and Analog Expansion I/O Features Chapter 2
Valid Range of the 2085-IRT4 Data Formats
Data Format Sensor Type – Temperature
Raw/Proportional Data
Engineering Units x 1 Temperature Value
Engineering Units x 10 Temperature Value
Percent Range
(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).
(2)
(10 Thermocouples, 8 RTDs)
(1)
(3)
(°C/°F)
(4)
(°C/°F)
Sensor Type
0…100 mV
-32768…32767
0…10000
0…1000
0…10000
(5)
(6)
Sensor Type
0…500 ohms
(7)
0…5000
(8)
0…500
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
Rockwell Automation Publication 2080-UM003A-EN-E - March 2013 13
Chapter 2 Discrete and Analog Expansion I/O Features
TIP
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.
Filter frequency
• 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.
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.
For quickstart instructions on how to add, configure, delete and replace
your expansion I/O module, see Configure Your Expansion I/O Module
Summary
14 Rockwell Automation Publication 2080-UM003A-EN-E - March 2013
This chapter discussed the features of the analog and discrete Micro800
expansion I/O modules.
.
Chapter
L1
L2
I-00
I-01
COM
I-02
I-03
COM
I-04
I-05
COM
COM
I-06
I-07
120V AC (2085-IA8)
240V AC (2085-IM8)
45313
3
Wiring Connections
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.
Input/Output Wiring
Basic wiring of devices to the expansion I/O modules are shown below.
2085-IA8 or 2085-IM8
Rockwell Automation Publication 2080-UM003A-EN-E - March 2013 15
Chapter 3 Wiring Connections
I-00
I-01
COM0
I-02
I-03
COM0
I-04
I-05
COM0
I-06
I-07
COM0
I-08
I-09
COM1
I-10
I-11
COM1
I-12
I-13
COM1
I-14
I-15
COM1
45299
Terminal Block 1 Terminal Block 2
-DC (sinking)
+DC (sourcing)
O-00
O-01
L1
O-02
O-03
L1
O-04
O-05
L1
L1
O-06
O-07
L1
L2
120V / 240V AC
45314
2085-IQ16
2085-OA8
16 Rockwell Automation Publication 2080-UM003A-EN-E - March 2013
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