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Industrial Durability: UL5085-2 Listed and CE compliant with a high MTBF for critical control applications
making it easy for facility managers to maintain access across multiple units with a master key
For technicians performing HVAC pilot line replacement or installing custom instrumentation
The 5500-135M is the direct replacement for 5500-135
improving overall system safety
Belimo S1A Switch Els PW 17895 Industrial Durability: UL5085-2 Listed andThe Belimo S1A Auxiliary Switch provides reliable end stop signaling and interface capability for an extensive range of non spring return actuators, including the LM, NM, AM, and GM series. This single pole double throw (SPDT) switch is designed to replace the legacy AM 661 model, offering a seamless field addition for contractors managing damper automation or HVAC control systems. Engineered for precision, the switching point is fully adjustable