Phoenix Contact PSR-SCP-24UC/ESA4/2X1/1X2 Safety Relay

Phoenix Contact PSR-SCP-24UC/ESA4/2X1/1X2 Safety Relay for Emergency Stop & Door Safety

The Phoenix Contact PSR-SCP-24UC/ESA4/2X1/1X2 safety relay is designed for dependable emergency stop and safety door monitoring in industrial automation. Built to meet stringent requirements up to SIL 3 and Category 4, Performance Level e, it ensures high-level protection for people and equipment. This relay operates on a nominal 24 V DC supply and offers two independent enabling paths plus one signaling output, making it ideal for complex safety circuits. Its compact 22.5 mm housing allows for efficient panel integration while delivering consistent, standards-compliant performance in demanding environments.

Engineered for reliability, the Phoenix Contact PSR-SCP-24UC/ESA4/2X1/1X2 combines emergency stop and safety door control in one unit. It uses force-guided relay contacts for dependable switching and features LED indicators to simplify monitoring and troubleshooting. Installers benefit from quick connections via plug-in screw terminals and the option of manual or automatic reset modes, improving system flexibility. With resistance to shock, vibration, and wide temperature ranges, it is perfectly suited for modern production lines, robotics systems, and other machinery where safety cannot be compromised. This device helps minimize downtime, ensures worker protection, and maintains uninterrupted operation.

Why Phoenix Contact PSR-SCP-24UC/ESA4/2X1/1X2?
Because it delivers maximum machine safety in minimal space. This relay combines emergency stop and door monitoring in one compact unit, achieving SIL 3 and Cat. 4 protection while simplifying wiring and diagnostics. It’s the go-to choice for engineers who want reliable safety control without sacrificing panel space or installation time.

What problem does it solve?
It eliminates the risk of unsafe machine operation by ensuring safety doors and emergency stops work flawlessly. With dual enabling paths, monitored resets, and rugged design, it prevents accidents, minimizes downtime, and ensures compliance with strict safety standards—solving the critical challenge of protecting both people and equipment in industrial environments.

Key Features & Specifications – Phoenix Contact PSR-SCP-24UC/ESA4/2X1/1X2 : Article Number 2963750

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Commercial Information – Phoenix Contact PSR-SCP-24UC/ESA4/2X1/1X2

The Applications

1. Automated Assembly Line with Robotic Cells

On modern automotive lines, multiple robotic arms work simultaneously, often within enclosed safety zones. The PSR-SCP-24UC/ESA4/2X1/1X2 safety relay monitors emergency stops and safety door interlocks, shutting down machinery instantly if a worker enters or presses an E-stop. Its dual enabling paths provide redundant protection, while the slim 22.5 mm housing saves valuable control cabinet space. With clear LED indicators, maintenance teams can quickly locate issues, reducing downtime and ensuring both operator safety and production continuity.

2. Packaging Machine with Frequent Changeovers

In food and consumer goods packaging, machines require frequent adjustments when switching product sizes. Operators regularly open guards during setup, creating potential risks. The safety relay manages both manual and automatic reset modes, ensuring equipment cannot restart until all doors are closed and verified. Its force-guided contacts provide reliable switching even when vibrations or rapid cycles occur. This increases machine availability, safeguards workers during changeovers, and supports uninterrupted production in fast-moving environments.

3. Automated Guided Vehicle (AGV) in Warehouses

Warehouses often use AGVs to move goods across zones shared with human workers. To maintain safe operation, safety gates and emergency stops are linked through the safety relay. If triggered, the relay disconnects the AGV drive system and simultaneously signals the supervisory controller. With SIL 3 and PL e certification, the relay guarantees compliance with high safety standards. Its robust design ensures dependable performance in mobile applications where shocks and vibrations are common, protecting both staff and automated equipment.

4. CNC Machine Enclosure in Metalworking

In precision machining, CNC centers are enclosed to protect operators from debris and coolant spray. The safety relay integrates signals from door interlocks and emergency stop switches, cutting drive power immediately if a door is opened or an E-stop is pressed. Its wide operating temperature range ensures stable operation even when machines generate significant heat during extended use. By combining reliability with compact installation, the relay provides critical safety assurance while supporting continuous operation in demanding industrial shops.

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