Overview
The Phoenix Contact PSR-SCP-24DC/ESP4/2X1/1X2 is a compact, single-channel safety relay designed for critical industrial safety applications. Operating at 24VDC, this relay meets SIL 3 (Safety Integrity Level 3) requirements for both high-demand and low-demand safety functions. It is approved per EN 50156, DNV (Germanischer Lloyd), and EN ISO 13849-1, making it suitable for emergency stop circuits, safety door interlocks, and machinery safeguarding systems where redundant enabling signals and positive feedback are essential.
Key Features
- SIL 3 Certified: Approved for high and low-demand safety applications per international standards
- 1-Channel Configuration: Single-channel monitoring with 2 enabling current paths and 1 signal (alarm) contact
- Electromechanically Forced-Guided Contacts: Ensures positive opening and closing without cross-talk between switching elements
- AgSnO2 Gold-Flashed Contacts: Corrosion-resistant contact material rated at 6A for reliable switching performance
- Dust-Proof Design: Sealed housing protects against industrial contamination
- DIN Rail Mounting: Mounts on 35mm DIN rail horizontally or vertically
- M3 Screw Terminals: Plug-in screw terminal blocks for secure, tool-less connections
Technical Specifications
- Input Voltage: 24VDC ±10%
- Coil Power Consumption: ~1.6W
- Output Contacts: 2 NO (normally open), 1 NC (normally closed)
- Contact Arrangement: 2X1/1X2 (2 enabling paths, 1 signal contact)
- Contact Rating: 6A at 250VAC, 6A at 30VDC (resistive load)
- Safety Rating: SIL 3, Category 3 per EN ISO 13849-1
- Standards Compliance: EN 50156, EN ISO 13849-1, DNV Approval
- Response Time: ~25ms (coil de-energized to safe state)
- Operating Temperature: -20°C to +60°C
- Housing Material: Polyamide PA (non-reinforced)
- Mounting: 35mm DIN Rail, horizontal and vertical
- Width: 22.5mm
- Certifications: SIL 3, EN 50156, EN ISO 13849-1, DNV, IP20
Typical Applications
- Emergency stop relay circuits in machinery and equipment
- Safety door interlocks and gate monitoring
- Redundant safety signal feedback and supervision
- Industrial automation safety control panels
- Machine tool and press safeguarding
- Conveyor and material handling safety systems
- Any machinery requiring SIL 3 certified monitoring and control
Compatibility & Replacements
Compatible With
- Phoenix Contact PSR series control systems
- Industrial 24VDC control circuits and safety logic
- Standard DIN rail-mounted 35mm control panels
- EN 954-1 Category 3 and 4 safety control architectures
- Any machinery requiring SIL 3 emergency stop or interlocking functions
Replaces / Drop-In Replacement For
- Phoenix Contact PSR-SCP-24DC/ESP4/2X1/1X2 (OEM part 2981020) — exact equivalent
- Similar single-channel SIL 3 safety relays in comparable footprint and rating
- Verify compatibility with your safety engineer or system integrator before ordering alternative models
Works With
- Phoenix Contact PSR control system software and firmware
- Standard 24VDC power supplies and control circuits
- Manual e-stop push buttons and safety switches
- Interlock sensors and safety gate switches
- Industrial safety logic controllers and PLC systems
- Distributed I/O modules compatible with 24VDC safety signals
