Module with key switch, with switch use (default = control button, others on request);
for protective low voltage; without half cylinder (accessory 20-9511) Installation depth: 57 mm.
With 2 LEDs for status indication (green / red, for example, alarm on / off) including series resistor for connection to 12 V DC to 24 V DC. With switch use (default = control button, others on request) for low voltage, without half-cylinder (accessory 20-9511);
Construction: aluminum.