Phoenix PSR Series: Safety Relays & Interface Modules - Selection Guide
Product Overview
The Phoenix PSR Series encompasses industrial safety relays and multi-functional interface modules designed for safety-critical control and signal conversion in automation systems. Covering core sub-series (PS/PLC/PIP/PE/MM) with 24V DC control voltage, these modules feature diverse contact configurations (1NO/1NC/2CO/2NO) and terminal types (screw/SC, plug-in/PT, spring-loaded/SP). Compliant with global safety standards (EN ISO 13849-1 PLe, SIL 3), they provide reliable safety circuit control, signal isolation, and multi-channel I/O expansion—ideal for emergency stop circuits, safety door monitoring, and general-purpose load control in manufacturing, machinery, and process automation.
Model Quick Reference Table
1. PS Sub-Series Safety Relays (Basic Safety Control)
| Model No. |
Product Name |
Contact Configuration |
Terminal Type |
Key Features |
Application Scenarios |
| 2700398 |
PSR-PS40-1NO-1DO-24DC-SC |
1 Normally Open (NO) + 1 Digital Output (DO) |
Screw (SC) |
Basic safety control, 1NO safety contact |
Simple safety circuit control (e.g., single safety door) |
| 2702663 |
PSR-PS23-1NO-1NC-24VDC-SC |
1NO + 1 Normally Closed (NC) |
Screw (SC) |
Dual contact configuration, safety monitoring |
Safety circuit interlocking (e.g., emergency stop + safety door) |
| 2702524 |
PSR-PS22-1NO-1NC-24VDC-SC |
1NO + 1NC |
Screw (SC) |
Standard safety relay, cost-effective |
General safety control for small machinery |
| 2700357 |
PSR-PS21-1NO-1NC-24DC-SC |
1NO + 1NC |
Screw (SC) |
Compact design, reliable safety performance |
Space-constrained safety circuit applications |
| 2700356 |
PSR-PS20-1NO-1NC-24DC-SC |
1NO + 1NC |
Screw (SC) |
Entry-level safety relay |
Basic safety protection for non-critical machinery |
| 1119573 |
PSR-PE20-1NO-24DC-SC |
1NO |
Screw (SC) |
Single safety contact, simplified design |
Simple safety signal switching (e.g., alarm activation) |
2. PLC Sub-Series Interface Relays (PLC-Safety Integration)
| Model No. |
Product Name |
Contact Configuration |
Terminal Type |
Key Features |
Application Scenarios |
| 1480226 |
PSR-PLC21-2CO-24DC-SC |
2 Changeover Contacts (2CO) |
Screw (SC) |
PLC-safety circuit integration |
Dual-channel signal conversion between PLC and safety devices |
| 1480212 |
PSR-PLC21-2CO-24DC-PT |
2CO |
Plug-in (PT) |
Tool-free wiring, fast maintenance |
Quick-deploy PLC safety interface systems |
3. PIP Sub-Series Multi-Functional Modules (Multi-Channel Control)
| Model No. |
Product Name |
Contact Configuration |
Terminal Type |
Key Features |
Application Scenarios |
| 2903253 |
PSR-PIP-24DC/MXF1/4X1/2X2/B |
4×1NO + 2×2CO |
Screw (SC) |
Multi-channel mixed contact design |
Complex safety circuits with multiple input/output requirements |
4. MM Sub-Series Multi-Functional Modules (NO/DO Combination)
| Model No. |
Product Name |
Contact Configuration |
Terminal Type |
Key Features |
Application Scenarios |
| 1249516 |
PSR-MM35-1NO-1DO-24DC-SP |
1NO + 1DO |
Spring-loaded (SP) |
Tool-free wiring, compact |
Single-channel safety + standard load control |
| 1249515 |
PSR-MM35-1NO-1DO-24DC-SC |
1NO + 1DO |
Screw (SC) |
Secure wiring, reliable performance |
General-purpose safety + standard I/O integration |
| 2702358 |
PSR-MM30-2NO-2DO-24DC-SP |
2NO + 2DO |
Spring-loaded (SP) |
Dual-channel safety + standard output |
Dual safety circuit control (e.g., two safety doors) |
| 2702357 |
PSR-MM30-2NO-2DO-24DC-SC |
2NO + 2DO |
Screw (SC) |
High-channel density, secure wiring |
Large machinery with multiple safety/standard I/O needs |
| 2702356 |
PSR-MM25-1NO-2DO-24DC-SP |
1NO + 2DO |
Spring-loaded (SP) |
Mixed single safety + dual standard output |
Safety monitoring + dual load control (e.g., valves, pumps) |
| 2702355 |
PSR-MM25-1NO-2DO-24DC-SC |
1NO + 2DO |
Screw (SC) |
Cost-effective, flexible I/O combination |
Small-to-medium machinery safety + standard control |
Core Technical Specifications (Universal)
| Parameter |
Value |
Notes |
| Control Voltage |
24V DC (19.2~28.8V) |
Universal industrial safety control voltage |
| Safety Certifications |
EN ISO 13849-1 (PLe), SIL 3 |
Meets critical safety application requirements |
| Operating Temperature |
-25℃~70℃ |
Adapts to harsh industrial environments |
| Mounting Type |
35mm DIN rail (NS 35/7.5) |
Compact design for space-saving cabinet layout |
| Terminal Types |
Screw (SC): Secure wiring; Plug-in (PT): Fast maintenance; Spring-loaded (SP): Tool-free installation |
Flexible wiring options for diverse needs |
| Protection Class |
IP20 (cabinet mounting) |
Dust-proof for industrial control cabinets |
| Contact Rating |
250V AC/6A, 24V DC/3A |
Handles standard industrial loads |
| Insulation Strength |
4kV (coil-contact) |
Anti-interference, protects control systems |
| Certifications |
CE, UL, CSA |
Global industrial compliance |
| Power Consumption |
≤3W |
Low heat generation for dense mounting |
Application Scenarios & Recommended Models
1. Basic Safety Circuit Control
- Requirement: Simple emergency stop or safety door control
- Recommended Models: 2700356 (PSR-PS20-1NO-1NC-24DC-SC), 1119573 (PSR-PE20-1NO-24DC-SC)
- Key Reason: Cost-effective, compact design; meets basic PLe/SIL 3 safety requirements
2. PLC-Safety Integration
- Requirement: Signal conversion between PLC and safety devices (dual-channel)
- Recommended Models: 1480226 (SC terminal), 1480212 (PT terminal)
- Key Reason: 2CO contacts for flexible signal routing; SC/PT terminals fit wiring preferences
3. Multi-Channel Safety + Standard Control
- Requirement: Dual safety door monitoring + dual standard load control
- Recommended Models: 2702358 (SP terminal), 2702357 (SC terminal)
- Key Reason: 2NO + 2DO configuration covers safety and standard I/O needs; SP for fast installation
4. Complex Safety Circuits
- Requirement: Multiple input/output channels for mixed safety/standard control
- Recommended Model: 2903253 (PSR-PIP-24DC/MXF1/4X1/2X2/B)
- Key Reason: 4×1NO + 2×2CO mixed contacts; adapts to complex safety circuit designs
5. Space-Constrained Cabinets
- Requirement: Compact safety relay for small control cabinets
- Recommended Model: 2700357 (PSR-PS21-1NO-1NC-24DC-SC)
- Key Reason: Narrow width, integrated safety functions; saves cabinet space
Core Advantages
- Global Safety Compliance: PLe/SIL 3 certifications meet international safety standards for critical applications
- Flexible Terminal Options: SC (secure), PT (fast), SP (tool-free) terminals fit diverse wiring needs
- Mixed I/O Configurations: Combines safety contacts (NO/NC/CO) with standard DO for integrated control
- Industrial-Grade Reliability: -25℃~70℃ operating temperature, 4kV insulation, and IP20 protection
- Compact Design: DIN rail mounting with narrow profiles maximizes cabinet space utilization
- Easy Integration: Direct compatibility with Phoenix safety devices and mainstream PLC systems
- Cost-Effective Variants: Entry-level (PS20) to multi-functional (MM30) models cover diverse budget needs
Installation & Usage Notes
- Safety Wiring: Follow EN ISO 13849-1 guidelines; separate safety and standard wiring by ≥10mm
- Terminal Selection: Choose SC terminals for vibration-prone environments; SP/PT for fast maintenance
- Voltage Matching: Ensure control voltage is 24V DC (19.2~28.8V); avoid overvoltage (use fuses if needed)
- Contact Load Matching: Do not exceed 6A AC/3A DC contact rating; use contactors for high-power loads
- Mounting Spacing: Reserve ≥5mm between modules for heat dissipation; avoid direct sunlight
- Maintenance Checks: Regularly inspect terminal tightness (SC/PT) and module status; replace damaged units promptly
- Safety Circuit Testing: Verify safety function (e.g., emergency stop activation) after installation and periodic maintenance
