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Chapter 38, General fm certification information, Module installation – Rockwell Automation 1797-XXX FLEX Ex System Certification Reference Manual User Manual

Page 173: Module installation -1, Chapter

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Publication 1797-6.5.6 - June 2005

Chapter

38

General FM Certification Information

Module Installation

FLEX Ex I/O modules must be used with a 1797-TB3 or -TB3S intrinsically
safe terminal base unit.

You will need to rotate the keyswitch (1) to the correct position depending on
the module. Refer to the module’s installation instructions for more
information. Do not change the position of the keyswitch after wiring the
terminal base unit.

Make certain that you only connect terminal base units to other intrinsically
safe system modules, adapters or power supplies to maintain the integrity of
the intrinsically-safe system. You may use the 1794-CE1 and/or 1794-CE3
cables with the FLEX Ex system.

Remove cap plug and attach another intrinsically safe terminal base unit (2) to
the right of the terminal base unit if required.

Do not remove the flexbus cover (8) on the right-most terminal base unit.

Label here or under here

40231

(1) keyswitch

(8) flexbus

cover

(2) terminal

base unit

42480

① ✍ ③