The SIGUARD safety system based on the PM-D F1, F2, F3, F4, F5 and PM-X safety modules can be combined with ET 200S motor starters to enable local safety applications up to category 4 in accordance with EN 954-1, independent of the safety-related control carried out by the PLC. The costs involved in the configuration and wiring of conventional safety systems are no longer incurred.

The safety sensors are directly connected to the safety modules. Instead of the safety relays which are otherwise essential, the safety modules available with functions for evaluating emergency stop circuits, for monitoring protective doors or for implementation of time-delayed shut-downs safely switch off downstream motor starters. In addition, they monitor their auxiliary voltages.