User Manual

Rockwell Automation Publication 1756-UM540A-EN-P - May 2014 65
Chapter 4
1756-IRT8I Combined Temperature-sensing
Isolated Analog Module
The 1756-IRT8I module has eight isolated channels. Each channel supports
connection to the following input types:
• RTD, both 3-wire and 4-wire
• Thermocouple mV devices
The module provides 24-bit data resolution. Additional features are described in
this chapter.
1756-IRT8I Module Features
The 1756-IRT8I module has the following features:
• Multiple Input Ranges
• Notch Filter
• Underrange/Overrange Detection
• Digital Filter
• Process Alarms
• Rate Alarm
• Sensor Offset
• 10 Ohm Copper Offset
• Wire Off Detection
• Te m p er a t ur e Un i t s
• Sensor Types
• Thermocouple Wire Length Compensation
• Synchronized Sampling
• Cold Junction Compensation
Topic Page
1756-IRT8I Module Features 65
Module Block and Circuit Diagrams 87
Wire the 1756-IRT8I Module 89
Fault and Status Reporting 92
IMPORTANT
Most of the features available on the 1756-IRT8I module are software
configurable. For more information on how to configure the module, see
Chapter 7
, Configure ControlLogix Isolated Analog I/O Modules on page 121