Phoenix Contact 2700357 – PSR-PS21-1NO-1NC-24DC-SC Safe Coupling Relay, In Stock
Buy the Phoenix Contact 2700357, a PSR-PS21-1NO-1NC-24DC-SC coupling relay for SIL 2 high- and low-demand applications, coupling digital output signals to I/O. Features 1 enabling current path, 1 confirmation current path, 1 digital signal output, and a fixed screw terminal block. In stock and available for fast shipping. Get a quote today.
Key Technical Specifications
- Product Type: Coupling relay (safe)
- Product Family: PSR-PS21
- Safety Rating: Up to SIL 2 per IEC 61508
- Contact Configuration: 1 enabling current path, 1 confirmation current path, 1 digital signal output
- Contact Guidance: Force-guided contacts per EN 50205
- Coil Voltage: 24 V DC
- Connection Type: Fixed screw terminal block
- Housing Width: 6.8 mm
- Application: Safe state off applications
- Special Features: Integrated test pulse filter
- Hazardous Area Approval: Class I, Zone 2
- PCB Protection: Corrosion protection via protective coating
Design and Performance
SIL 2-Certified Signal Coupling
Couples digital output signals from failsafe controllers to I/O devices such as valves, providing electrical isolation and power adaptation up to SIL 2 (IEC 61508) for high- and low-demand safety applications.
Reliable Proof Testing and Diagnostics
An integrated signal contact enables easy proof testing per IEC 61508, while the confirmation current path gives direct feedback on the relay’s switching state for ongoing diagnostic monitoring.
Force-Guided Safety Contacts
Force-guided contacts per EN 50205 mechanically prevent NO and NC contacts from closing simultaneously, delivering the highest level of functional safety assurance for the coupling function.
Long Service Life via Test Pulse Filtering
Filtering of controller test pulses extends relay service life by preventing unnecessary switching cycles caused by routine safety controller diagnostic pulses.
Compact, Hazardous-Area-Rated Design
A slim 6.8 mm housing width supports dense DIN rail layouts, while Class I, Zone 2 approval extends this coupling relay’s use into potentially hazardous industrial process areas.
Why Buy the 2700357 From Us
- In stock and ready for immediate dispatch
- Fast shipping on every order
- Commercial advisory support to help you confirm the right safety coupling relay configuration
- Competitive pricing — get a quote in minutes
