Control Units ABT-CU-8LCD / ABT-CU-11LT / ABT-CU-11LCD
User Manual
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3. Connecting control units
3.1 CHAIN typology
In CHAIN typology, the connection is not redundant. Connecting units in this system does not guar-
antee eciency operation of the system in the event of communication cable damage. According
to PN-EN 54-16 norm, connections between VAS control units in the distributed system must be
redundant. Connections in CHAIN typology are applied in RACK cabinets, and in the system not
responsible for sending evacuation messages.
Fig. 8.
ABT-CU-11LT
ABT-CU-11LT
ABT-CU-8LCD
Example of CHAIN typology control units connection