Rockwell Automation Publication 2080-UM003A-EN-E - March 2013 7
Discrete and Analog Expansion I/O Features Chapter 2
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.
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.
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.
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)
-10…10 V
0…10 V
2085-IF8
2085-OF4
Micro800 Expansion I/O Modules
Catalog Type Description
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