4
FLEX Ex Bus Isolator and Flexbus Connector
Publication 1797-5.13 - August 2001
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.
Electrostatic Charge
Protect the system against electrostatic charge. Post a sign near this
module:
Attention! Avoid electrostatic charge.
For your
convenience, a sign which can be cut out is included in this
installation instruction.
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.
ATTENTION
!
For proper operation, cycle power to the
1797-BIC at the same time power is cycled to the
associated adapter.
1794
Adapter
1797
CEC
1797
BIC
1797 I/O
& Base
1797 I/O
& Base
1797 I/O
& Base
1797 I/O
& Base
1797
power
supply
24V dc
power
supply
42754
