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Ground the thermocouple/mv input module – Rockwell Automation 1769-IT6 Compact I/O Thermocouple/mV Input Module User Manual

Page 15

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Compact I/O Thermocouple/mV Input Module 15

Publication 1769-IN026C-EN-P - February 2010

Terminal Block with CJC Sensors and Thermocouple Junctions

Ground the Thermocouple/mV Input Module

This product is intended to be mounted to a well-grounded mounting surface, such as a metal
panel. Additional grounding connections from the module’s mounting tabs or DIN rail (if
used) are not required unless the mounting surface cannot be grounded. Refer to Industrial
Automation Wiring and Grounding Guidelines, publication

1770-4.1

, for additional

information.

TIP

When using an ungrounded thermocouple, the shield must be connected to ground at the
module end.

IMPORTANT

When using grounded and/or exposed thermocouples that are touching electrically
conductive material, the ground potential between any two channels cannot exceed
±10V DC, or temperature readings will be inaccurate and the module may be damaged.

NC

IN 0+

IN 0-

IN 3+

IN 1 +

IN 3-

IN 1-

IN 4+

IN 2+

IN 4-

IN 2-

IN 5+

IN 5-

NC

+

-

+

-

+

-

CJC 0+

CJC 0-

CJC 1-

CJC 1+

Within 10V DC

CJC Sensor

Grounded Thermocouple

Ungrounded
Thermocouple

CJC Sensor

Grounded Thermocouple