Rockwell Automation 1794-IT8,D17946.5.7 Thermocouple/Millivolt Input Module - Manual (Page 18)

2–4 How to Install Your Thermocouple/mV Input Module
Publication 1794-6.5.7
The thermocouple/mV module mounts on a 1794-TB2, -TB3 or
-TB3T terminal base unit.
Important: You must use a 1794-TB3T terminal base unit if you
are using the thermocouple/mV module for
thermocouple inputs. You can use the 1794-TB2 or
-TB3 terminal base for millivolt inputs only.
4
1
3
2
5
6
7
1. Rotate the keyswitch (1) on the terminal base unit (2) clockwise
to position 3 as required for the thermocouple/mV module.
2. Make certain the flexbus connector (3) is pushed all the way to
the left to connect with the neighboring terminal base/adapter.
You cannot install the module unless the connector is fully
extended.
!
ATTENTION: Remove field-side power before
removing or inserting the module. This module is
designed so you can remove and insert it under
backplane power. When you remove or insert a
module with field-side power applied, an electrical arc
may occur. An electrical arc can cause personal injury
or property damage by:
•
sending an erroneous signal to your system’s field
devices causing unintended machine motion
•
causing an explosion in a hazardous environment
Repeated electrical arcing causes excessive wear to
contacts on both the module and its mating connector.
Worn contacts may create electrical resistance.
3. Before installing the module, check to make sure that the pins on
the bottom of the module are straight so they will align properly
with the female connector in the base unit.
4. Position the module (4) with its alignment bar (5) aligned with
the groove (6) on the terminal base.
5. Press firmly and evenly to seat the module in the terminal base
unit. The module is seated when the latching mechanism (7) is
locked into the module.
6. Repeat the above steps to install the next module in its terminal
base unit.
Installing the Module