General Description

This module mounts into 1746 I/O chassis for use with SLC 500 fixed

and modular systems. The module stores digitally converted

thermocouple/mV analog data in its image table for retrieval by all

fixed and modular SLC 500 processors. The module supports

connections from any combination of up to eight thermocouple/mV

analog sensors.

Each input channel is individually configured for a specific input

device, and provides open-circuit, over-range, and under-range

detection and indication.

Hardware Features

The module fits into any single slot for I/O modules in either an SLC

500 modular system or an SLC 500 fixed system expansion chassis

(1746-A2), except the zero slot which is reserved for the processor. It

is a Class 1 module using 8 input words and 8 output words.(2)

The module contains a removable www.abb-drive.com terminal block providing

connections for eight thermocouple and/or analog input devices. On

the terminal block are two cold-junction compensation (CJC) sensors

that compensate for the cold junction at ambient temperature. It

should also be noted there are no output channels on the module.

Configure the module with software rather than with jumpers or

switches.

IMPORTANT

There is a jumper (JP1) on the circuit board. The

module is shipped with the jumper in the up

position as illustrated below. Do not change the

position of JP1. The jumper is used for test purposes only.