Description
Common Questions & Technical Support: What causes a pressure switch fault code on a Reznor unit
For large-scale HVAC and building automation systems
The unit is UL and CSA approved
Universal Power Inputs: Operates on both 24VAC and 24VDC
Siemens Industrial Controls 3RH2921-2DE11 Auxiliary Switch 320788-704 Common Questions & Technical Support:The Siemens 3RH2921 2DE11 is a high performance auxiliary switch block designed for seamless integration with SIRIUS 3RT2 contactors and 3RH2 contactor relays. This front mounting module features a 1NO + 1NC (1 Normally Open 1 Normally Closed) contact configuration, engineered specifically for electronic compatible signaling in demanding industrial environments. As a direct replacement for the legacy 3RH1921 2DE11, it maintains a compact form factor
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
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