Rockwell Automation 1746-NT8 SLC 500 Thermocouple/mV Analog Input Module User Manual - Manual (Page 15)

Publication 1746-UM022B-EN-P - January 2005
Module Overview 1-5
Module Operation
The module’s input circuitry consists of eight differential analog
inputs, multiplexed into an A/D convertor. The A/D convertor reads
the analog input signals and converts them to a digital value. The
input circuitry also continuously samples the CJC sensors and
compensates for temperature changes at the cold junction (terminal
block).
Module Addressing
The module requires eight words each in the SLC processor’s input
and output image tables. Addresses for the module in slot e are as
follows:
I:e.0-7 thermocouple/mV or status data for channels 0 to 7,
respectively (dependent on bit in configuration word).
O:e.0-7 configuration data for channels 0 to 7, respectively.
See Module Addressing on page 3-2 to see the module’s image table.