UNITROL 1000 3BHE014557R0003 ABB Mechanical Protection Device of Module Communication System

UNITROL 1000 3BHE014557R0003 ABB Mechanical protection device of module communication system

UNITROL 1000 3BHE014557R0003 ABB Mechanical protection device of module communication system

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Allocation of I/O Channels

If a safety function is equipped with redundant instrumentation, it is recommended

for availability reasons to distribute the signals to different I/O modules wherever

practical.

Communication Interfaces

The AC 800M HI comprises peer-to-peer communication via the control network;

the communication is certified for safety critical use. Actually this function is a

“peer-to-multiple-peer” communication, i.e. data made available for communication

in one controller, can be read from multiple controllers.

This peer-to-peer communication can be established by using the MMS control

modules designed for this purpose, for more details, see Software Architecture on

page 76.

Other available communication interfaces are certified interference free, i.e. they

can be used in the AC 800M HI and the data communicated on them can be used in

both SIL and non-SIL Applications, but only for non safety critical functions.

For information on available communication interfaces refer to the user manual AC

800M 5.1 Communication Protocols, 3BSE035982* page 39.