Siemens Industrial Controls 3RH2911-1MA11 Aux 318172-701 Reliable Protection: High-sensitivity detection helps

Reliable Protection: High-sensitivity detection helps prevent HVAC system failure by alerting the board to high or low-pressure situations

Key Benefits Precise Superheat Regulation: Maintains optimal evaporator coil efficiency by adjusting refrigerant flow based on actual load

Compatible with select Carrier furnace models

Verify 208V across the primary leads

Siemens Industrial Controls 3RH2911-1MA11 Aux 318172-701 Reliable Protection: High-sensitivity detection helpsIntegrate the Siemens 3RH2911 1MA11 auxiliary switch block into your control panel for dependable status feedback and interlocking functions. As a veteran grade front mounted auxiliary contact, this unit is engineered for the SIRIUS 3RT2 contactors and 3RH2 contactor relays, covering frame sizes S00 through S3. It features a 1NO 1NC contact configuration with a bottom entry wiring design, which is essential for maintaining clean wire management in