Siemens Industrial Controls 3RH2911-1HA22 Auxiliary Contact Block 2N/O & 2N/C

The Siemens Industrial Controls 3RH2911-1HA22 Auxiliary Contact Block is an essential component of the HVAC systems. This block is designed with 2 normally open and 2 normally closed contacts to ensure that it can both switch and signal. It works in low voltage as additional control or feedback in systems as air handling units, chillers, and ventilation systems. The block has been designed and it has a longevity and has an electrical longevity cycle. It assists to optimize the system by allowing control, and optimizing maintenance processes.