Rockwell Automation 1797-XXX FLEX Ex System Certification Reference Manual - Manual (Page 87)

1 Publication 1797-6.5.6 - June 2005
Chapter
18
1797-BIC Bus Isolator Module and
1797-CEC Flexbus Connector
General Installation The 1797-CEC and -BIC must not be exposed to the environment. These
modules have a protection factor of IP20. Provide a suitable metal enclosure.
If these modules are to be installed into a Zone 2 area, then ensure that this
enclosure has a protection class of IP54.
Make certain that you only connect the FLEX Ex backplane connector to
other intrinsically safe system modules to maintain the integrity of the
intrinsically-safe backplane.
QUALITY
B - A
Allen-Bradley
1797 - CEC
FLEXBUS
CONNECTOR
1 2 4 3
+V -V +V -V
1797 - BIC
PWR
QUALIT Y
B - A
Allen-Bradley
FLEXBUS
ISOLATOR
42864
1797-CEC 1797-BIC
ATTENTION
The 1797-BIC cannot be used as an associated apparatus
after its FLEX Ex backplane connector has been exposed
to non-intrinsically safe signals.