Rockwell Automation 1797-IRT8 FLEX Ex Thermocouple/RTD/mV Input Module User Manual - Manual (Page 9)

1 Publication 1797-6.5.2 - February 2001
Chapter
1
About the FLEX Ex Thermocouple/RTD/mV
Input Module
What this Chapter
Contains Read this chapter to familiarize yourself with the 1797-IRT8 input
module.
What the FLEX Ex
Thermocouple/RTD/mV
Modules Do The 1797-IRT8 module accepts up to 8 thermocouple, RTD or mV
inputs. The inputs are nonisolated and are selected with analog
multiplexers which have a common-mode input range of -0.5 to +3.6
volts. The inputs will accept a millivolt or resistive input. Default input
spans are –40.00mV to +100.00mV or 0.00 to 500.00 ohms. Fault
Indicators are located on the field side.
No switches or jumpers are used on the thermocouple/RTD/mV input
module. The Inputs have both fixed hardware filters and selectable
firmware digital filters.
This module offers:
•
local microprocessor intelligence for advanced features
•
full functionality without switches or jumpers
•
multiple data ranges that can be independently programmed in
channel groups
•
lead breakage detection
•
overrange/underrange alarms
as well as a host of other module features.
For information on: See page:
What the FLEX Ex Thermocouple/
RTD/mV Modules Do 1-1
How FLEX Ex Thermocouple/RTD/mV
Modules Communicate with
Programmable Controllers 1-2
Features of Your Module 1-2
Chapter Summary 1-5