Allen-Bradley 1794-IRT8, Руководство пользователя

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Publication 1794-6.5.12 - November 1997
2-8 How to Install Your Thermocouple/RTD/mV Input Module
Mounting the Thermocouple/RTD/mV Module on the Terminal
Base Unit
The TC/RTD/mV input module mounts on a 1794-TB3G or TB3GS
terminal base unit.
1. Rotate the keyswitch (1) on the terminal base unit (2) clockwise to
position 3 as required for the TC/RTD/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 can-
not install the module unless the connector is fully extended.
3. Make sure that the pins on the bottom of the module are straight so
they will align properly with the connector in the terminal base unit.
4. Position the module (4) with its alignment bar (5) aligned with the
groove (6) on the terminal base.
4
1
3
2
5
6
7
!
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.
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