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Easy Diagnostics: Simplified wiring schematic allows for rapid continuity testing and troubleshooting of the sensor circuit
allowing for rapid field servicing
or differential pressure applications
for proper HVAC part compatibility and efficiency
FSHE protocols
Siemens Industrial Controls 3RH1921-1DA11 Switch 326058-758 Easy Diagnostics: Simplified wiring schematicOptimize your control circuitry with the Siemens Sirius 3RH1921 1DA11, a precision engineered auxiliary switch block designed for secondary switching and status feedback. This first lateral mount unit features a compact 10mm width and provides 1 NO (Normally Open) and 1 NC (Normally Closed) contact configuration. Engineered for industrial reliability, it integrates seamlessly with Sirius 3RT1 contactors and 3RH1 contactor relays from sizes S0 through
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