Product Description
The Phoenix Contact PSR-PS20-1N0-1NC-24DC-SC is a designation associated with the PSR family of safe coupling relays, designed to couple digital output signals from failsafe controllers to I/O devices such as valves and actuators. These devices provide electrical isolation and power adaptation for functional safety applications and are rated for use in SIL (Safety Integrity Level) certified systems in accordance with IEC 61508. The PSR-PS2x series mounts on standard DIN rail and features force-guided contacts per IEC/EN 61810-3, an integrated test pulse filter, and a fixed screw terminal block connection. Suitable for emergency stop circuits, safety door monitoring, light grids, and Ex Zone 2 / Class I Div 2 hazardous area applications.
⚠ IMPORTANT: "PSR-PS2" is an abbreviated/partial model number. Phoenix Contact PSRmini coupling relays in this family include full catalog numbers such as PSR-PS20-1NO-1NC-24DC-SC, PSR-PS21-1NO-1NC-24DC-SC, PSR-PS22-1NO-1NC-24VDC-SC, and PSR-PS23-1NO-1NC-24VDC-SC. Please verify the complete catalog number from the product label before ordering or listing.
Technical Specifications
| Specification | Value |
|---|---|
| Brand | Phoenix Contact |
| Model / Part Number | PSR-PS2 (abbreviated — verify full catalog number on label) |
| Product Family | PSRmini |
| Product Type | Safe Coupling Relay |
| Relay Type | Electromechanical relay with force-guided contacts (IEC/EN 61810-3) |
| Nominal Supply Voltage (Us) | 24V DC (PSR-PS20/21 variants); 24V DC/AC (PSR-PS22/23 variants) |
| SIL Rating | Up to SIL 2 or SIL 3 (varies by sub-model) per IEC 61508 |
| Insulation / Overvoltage Category | Category III, Pollution Degree 2 |
| Enabling Current Paths | 1 (safety-related) |
| Contact Configuration | 1 NO + 1 NC (1NO/1NC) |
| Contact Material | AgSnO2 |
| Max Switching Voltage | 250V AC/DC |
| Min Switching Voltage | 12V AC/DC |
| Inrush Current (max) | 6A |
| Rated Supply Current (Is) | Typ. 45 mA |
| Power Consumption | Typ. 1.08 W |
| Protective Circuit | Serial polarity reversal protection; suppressor diode |
| Mounting Type | DIN Rail |
| Connection Technology | Fixed screw terminal block |
| Application | Safe state off; test pulse filter; Ex-rated (zone applications) |
| Standards / Approvals | IEC 61508, IEC 61511, EN 50156, TÜV certified |
| Known Sub-Models | PSR-PS20 (SIL3), PSR-PS21 (SIL2), PSR-PS22 (SIL3), PSR-PS23 (SIL3) |
We warranty all items for 30 days from date of purchase.
