Safety module, for automation systems, has two logics with bus communication between them and excess voltage protection at the bus

摘要

The safety module (24), for automation systems, has two logics (19,20) with bus communication (22) between them. An excess voltage protection has a cut-out (11) and input voltage comparator (12) at the bus communication lines for protection against a voltage overload. The bus communication channels have a current limiter (21). The excess voltage protection system functions continuously and in real time.