Specifications

Publication 1794-SG002D-EN-P - May 2012
94 Select FLEX Ex I/O Modules
1797-IRT8 8 Point 16-bit Non-isolated RTD Thermocouple/mV
Input Module
• input channels referenced to a single common
–RTD mode
– RTD types Pt100, Pt200, Ni100, Ni200, Ni120, Cu10
– 2-, 3-, and 4-wire connection
– sensor lead breakage and short circuit detection all 4 leads
– measuring resistance 0…500 Ω
– accuracy: 0.1% of span at 20 °C, filter cutoff < 1 Hz
•mV mode
– input voltage -40…100 mV differential sensing
– sensor breakage detection
•thermocouple mode
– types B, E, J, K, TXK/XK (L), N, R, S, T
–cold junction compensation (CJC)
– external reference junction (programmable)
– sensor breakage detection
– accuracy: 0.1% of span, filter cutoff < 1 Hz
–accuracy of CJC: ± 1 C/K
Schematic Drawing of the 1797-IRT8 Module
8 Point 16-bit Non-isolated RTD Thermocouple/mV Input Module
Specification 1797-IRT8
Input type Suitable for Pt 100, Pt200, Ni 100, Ni120, Ni200, Cu10
RTD, Thermocouple Type B, E, J, K, N, R, S, T, TXK/XK(L)
Configuration via internal bus