Hardware reference guide

I/O Modules
536
35013379 02 October 2007
140ATI03000 I/O Thermocouple Input 8 Channel Module
Overview The Thermocouple Input 8 Channel is an eight-channel thermocouple input module.
Specifications The following table shows the specifications for the TC IN module.
Specifications
Number of Channels 8
LEDs Active
F
1 ... 8 (Red) - Indicated channel is out of range
- or Broken wire condition is detected
Required Addressing 10 Words In
TC Types and Ranges Range (degrees C)
J - 210 ... + 760
K - 270 ... + 1370
E - 270 ... + 1000
T - 270 ... + 400
S - 50 ... + 1665
R - 50 ... + 1665
B + 130 ... + 1820
Millivolt Ranges - 100 mV ... +100 mV*
- 25 mV ... +25 mV*
*Open circuit detect can be disabled on these ranges.
TC Resistance / Max Source
Resistance
200Ω max for rated accuracy
Input Impedance > 1 MΩ
Input Filter Single low pass @ nominal 20 Hz,
plus notch filter at 50/ 60 Hz
Normal Noise Rejection 120 dB min @ 50 or 60 Hz
Cold Junction Compensation
(CJC)
Internal CJC operates 0 ... 60° C (errors are included in
the accuracy specification). The connector door must be
closed.
Remote CJC can be implemented by connecting a TC
(which monitors the external junction block temperature)
to channel 1. Types J, K, and T are recommended for
remote CJC.
Resolution
This document provided by Barr-Thorp Electric Co., Inc. 800-473-9123 www.barr-thorp.com