Siemens Auxiliary contacts are the perfect added component solutions to the main contacts. A key function of the Auxiliary contacts is they transfer data from the circuit to a logic controller, which consecutively gives instructions to the linked devices about whether to turn on or off. This instruction can also be executed remotely.
The SIRIUS auxiliary contact block 3RH2911-1HA13 has one NO and three NC contacts. This makes the auxiliary contact block an ideal complement to contactor relays and power contactors. The screw-type connection ensures easy installation. The auxiliary switches mounted at the front can be disassembled with the help of a centrally arranged release lever. Typical fields of application include motor and plant control, switching of light controls and multiplication of signals.
Design: Auxiliary switch block
Auxiliary contacts: 2 x NO/NC
Dimensions (W x H x D): 36 x 37.5 x 43.7 mm
Electrical connection: Screw-type terminals
Operating temperature: -25 °C to 60°C
Protection rating: IP20