Actuator-sensor interface system for connection to a master control unit for controlling and monitoring a machine system, whereby each slave sensor has an actuator interface incorporating a memory with a security address

摘要

System comprises slave interfaces (4), two-wire bus (1), master (3), sensor slaves (5) and security monitor (6). Each interface has a memory in which a predetermined bit pattern is stored. Said bit pattern points to a further address in memory. The response bit pattern is given within a preset time, given by an internal timer, to a master request.