Bộ điều khiển Control unit SG-EFS 104/2W Mayser, Control unit SG-EFS 104/2W, SG-EFS 104/2W Mayser

The single-fault-safe electronics module has dual channels (redundant design). Each channel controls a force-guided relay (OSSD 1 and 2), with each one also responsible for monitoring the other. The electronic system monitors the electrical resistance of the sensor with a defined closed-circuit current.

Ready for operation

The control unit is operated with a voltage of 24 V AC/DC. When the supply volt- age is connected, the green “Power” LED is lit up.
When the sensor is not activated, and after a reset, OSSDs 1 and 2 are in the ON state. The green “Sensor” and “Output” LEDs are lit up and the M1 and M2 signal outputs are set to HIGH. The signal circuit is in the OFF state.

Sensor activated

If the sensor is actuated, OSSDs 1 and 2 switch from the ON state to the OFF state. The green “Sensor” and “Output” LEDs go out, the M1 signal output is set to LOW and the M2 signal output is set to HIGH. The signal circuit is in the ON state.

Sensor cable break

In the event of a cable break on the sensor, OSSDs 1 and 2 are in the OFF state. The red “Fault” LED lights up. The green “Sensor” and “Output” LEDs go out and the M1 and M2 signal outputs are set to LOW. The signal circuit is in the ON state.

Signal circuit

The signal circuit works the opposite way round to OSSDs 1 and 2.