Rockwell Automation 1797-XXX FLEX Ex System Certification Reference Manual - Manual (Page 105)

1 Publication 1797-6.5.6 - June 2005
Chapter
23
1797-TB3S FLEX Ex Terminal Base Unit
General Information FLEX Ex I/O modules must be used with a 1797-TB3 or -TB3S intrinsically
safe terminal base unit.
Module Installation 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 or adapters to maintain the integrity of the
intrinsically-safe backplane.
Installation in Division 1/
Zone 1 Do not remove the flexbus cover (8) on the right-most terminal base unit.
42333
Label here
(8) flexbus
cover
(1) keyswitch
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