Rockwell Automation 1762-IT4 Thermocouple/mV Input Module - Manual (Page 12)

Publication 1762-UM002A-EN-P - July 2002
1-2 Overview
Data Formats
The data can be configured on board each module as:
•
engineering units x 1
•
engineering units x 10
•
scaled-for-PID
•
percent of full-scale
•
raw/proportional data
Filter Frequencies
The module uses a digital filter that provides high frequency noise
rejection for the input signals. The filter is programmable, allowing
you to select from six different filter frequencies for each channel:
•
10 Hz
•
50 Hz
•
60 Hz
•
250 Hz
•
500 Hz
•
1000 Hz
Hardware Features
Channels are wired as differential inputs. A cold junction
compensation (CJC) sensor is attached to the terminal block to enable
accurate readings from each channel. The sensor compensates for
offset voltages introduced into the input signal as a result of the
cold-junction where the thermocouple wires are connected to the
module.
Millivolt Input Type Range
± 50 mV -50 to +50 mV
± 100 mV -100 to +100 mV