Siemens 3RH1921-1HA22 Auxiliary Switch Block – 2NO/2NC for SIRIUS Contactors S0-S3
Application Scenarios In a large automotive stamping plant, the main press line experienced a recurring issue: when a critical conveyor motor would trip, the downstream automation cells would not receive a status signal, causing a cascade of jams and wasted parts. The maintenance team realized the existing motor contactors lacked sufficient auxiliary contacts to…
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