Siemens 3RH1921-1HA22-3AA1 auxiliary switch block

The SIEMENS auxiliary switch block 3RH1921-1HA22-3AA1 is used to expand circuit breakers and control devices to provide additional normally open (NO) and normally closed (NC) contacts for control, signaling, and monitoring tasks. It is compatible with various SIEMENS relay series and allows for flexible circuit adaptations. This block features pre-assembled anchor contacts and bridgeable contacts that ensure quick and easy installation. Mounting is tool-free directly on the front or side of the main devices, minimizing space requirements in the control cabinet and increasing flexibility. The compact design and robust construction guarantee reliable operation under various industrial conditions. Suitable for use in control and automation systems, control cabinet construction, and machine control. Offers up to two normally open (NO) and two normally closed (NC) contacts for enhanced functionalities. Order now. Availability and delivery time on request.