Rockwell Automation 1797-IRT8 FLEX Ex Thermocouple/RTD Module - Manual (Page 18)

18 FLEX Ex Thermocouple/RTD Input Module
Publication 1797-5.4 - June 2010
Repair
This module is not field-repairable. Any attempt to open this module will void
the warranty and IS certification. If repair is necessary, return this module to
the factory.
Specifications
Specifications - 1797-IRT8 Thermocouple/RTD Module
Number of Inputs 8 channels
IS input type Ex ia IIB/IIC T4
AEx ia IIC T4

Class I, II, III, Division 1 Group A-G T4
IS module type Ex ib IIB/IIC T4
AEx ib IIC T4

Class I, Division 1 Group A-G T4
Input Type Suitable for Pt 100, Pt 200, Ni 100, Ni 120, Ni 200, 10 Cu RTD,
thermocouple Type B, E, J, K, N, R, S, T, TXK/XK (L)
Configuration via internal bus
Signal Input Range 0…485
; -40…100 mV
Settling Time to 99% of Final
Value 8 ms (mV mode, °F thermocouple)
Open RTD Detection Out of range upscale reading
Lead Resistance
Compensation < 15 W total
Transfer Characteristics
Accuracy
Temperature Effect
RTDs: 0.1% of span @ 20 °C, filter cutoff < 1 Hz 
Thermocouples: 0.1% of span @ 20 °C,

filter cutoff < 1 Hz 
Cold junction compensation = +1 o C 
150 ppm/ o C (primary range)
Indicators 8 red fault indicators
1 green module power indicator
Specifications continued on next page