Rockwell Automation 1769-IT6 Compact I/O 1769-IT6 Thermocouple/mV Input Module - Manual (Page 12)

12 Rockwell Automation Publication 1769-UM004B-EN-P - March 2010
Chapter 1 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 these six
different filter frequencies for each channel:
• 10 Hz
• 50 Hz
• 60 Hz
• 250 Hz
• 500 Hz
• 1000 Hz
Hardware Features
The module contains a removable terminal block. Channels are wired as
differential inputs. Two cold junction compensation (CJC) sensors are attached
to the terminal block to enable accurate readings from each channel. These
sensors compensate for offset voltages introduced into the input signal as a result
of the cold-junction where the thermocouple wires are connected to the module.
Module configuration is normally done via the controller’s programming
software. In addition, some controllers support configuration via the user
program. In either case, the module configuration is stored in the memory of the
controller. Refer to your controller’s user manual for more information.