Rockwell Automation 1797-XXX FLEX Ex System Certification Reference Manual - Manual (Page 173)

1 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