3RH2921-2DA11 SIEMENS

The 3RH2921-2DA11 auxiliary switch block from Siemens is designed for lateral mounting on 3RH contactors and 3RT spring-type terminal contactors. This auxiliary switch features a configuration of 1 normally open (NO) and 1 normally closed (NC) contact, providing versatile signaling capabilities. The current path includes 1 NC contact and 1 NO contact, enhancing its suitability for diverse control circuit applications. Specifically, the R terminals are designated as 31/32 for NC and 43/44 for NO, while the L terminals are designated as 51/52 for NC and 63/64 for NO. These designations facilitate easy identification and wiring during installation. The spring-type terminals ensure a secure and vibration-resistant connection, improving the reliability of the control circuit. This auxiliary switch block is essential for expanding the functionality of contactors by providing additional contacts for signaling, interlocking, or other control functions. Its compact design and reliable performance make it a valuable component in various industrial automation systems. Siemens' commitment to quality ensures that this auxiliary switch block meets stringent industry standards, delivering consistent and dependable operation.