Phoenix Contact PSR-SPP-24UC/ESM4/2X1/1X2 Safety Relay

Phoenix Contact PSR-SPP-24UC/ESM4/2X1/1X2 Safety Relay – Reliable Emergency Stop & Safety Door Monitoring

The Phoenix Contact PSR-SPP-24UC/ESM4/2X1/1X2 safety relay is a compact and dependable solution for emergency stop functions and safety door monitoring in industrial applications. It is designed to achieve the highest safety categories, meeting SIL 3 and Performance Level e (PL e) requirements. With its dual-channel configuration, two enabling outputs, and a dedicated signaling path, it provides a secure method to protect both operators and equipment. Operating on a 24 V DC supply and equipped with user-friendly Push-in connections, this unit simplifies installation while ensuring that safety systems remain effective and reliable across demanding environments.

The PSR-SPP-24UC/ESM4/2X1/1X2 safety relay delivers real-world advantages that extend beyond compliance. Its robust electromechanical design with force-guided contacts ensures quick and reliable shutdown in critical moments, minimizing the risk of accidents. The slim 22.5 mm housing saves panel space, making it suitable for compact control cabinets. With a long mechanical lifespan exceeding 10 million cycles, it is built for continuous operation in high-demand industries such as automotive, packaging, and process control. Easy DIN rail mounting and modular terminal connections reduce setup and maintenance time, helping businesses maintain safe, productive, and cost-efficient operations.

Why Phoenix Contact PSR-SPP-24UC/ESM4/2X1/1X2?
Because it delivers uncompromising safety with a compact, efficient design. This model combines SIL 3 certification, dual-channel reliability, and effortless wiring in a single 22.5 mm housing. It’s built to safeguard machines and workers without adding complexity, making it a trusted choice for modern industrial automation systems where uptime and safety must go hand in hand.

What problem does it solve?
It eliminates the risk of unsafe machine operation during critical events. By providing reliable emergency stop and safety door monitoring, it ensures that hazardous equipment is immediately deactivated when necessary. This relay closes the gap between safety regulations and real-world performance, reducing accidents, preventing downtime, and giving operators confidence that protection is always in place.

Key Features & Specifications – Phoenix Contact PSR-SPP-24UC/ESM4/2X1/1X2: Article Number 2963705

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Commercial Information – Phoenix Contact PSR-SPP-24UC/ESM4/2X1/1X2

The Applications

1. Emergency Stop for Automated Assembly Lines

In modern automotive assembly lines, presses and robotic stations run at high speeds where human interaction is risky. The safety relay ensures that emergency stop buttons and guard interlocks instantly cut power if triggered. Its dual-channel monitoring adds redundancy so even if one path fails, the machine still shuts down safely. By meeting SIL 3 and PL e requirements, it gives production managers the assurance that both operators and valuable equipment remain protected without sacrificing workflow efficiency.

2. Secure Door Monitoring in Food Processing

Food processing plants often separate operating areas with safety doors to protect staff and prevent contamination. When integrated into these systems, the safety relay provides dependable monitoring: machinery halts immediately if a door is opened mid-process. Its compact size makes installation simple in crowded control panels, while its signaling output gives feedback to control systems for real-time tracking. This ensures compliance with both safety standards and food hygiene requirements, reducing downtime and protecting workers in sensitive environments.

3. Light Curtain Integration for Packaging Machines

Packaging equipment uses light curtains to detect when hands or objects break into the danger zone of conveyors and sealing systems. The relay connects to these light sensors, cutting power to the machine when the safety field is interrupted. Its fast switching and long service life support frequent interruptions common in packaging operations. At the same time, the dedicated signaling output provides diagnostics that help operators quickly identify the reason for stoppage, reducing delays and improving overall equipment effectiveness.

4. Heavy Machinery Safety in Mining and Metalworking

In rugged industries such as mining and metal forming, equipment operates under high loads and tough conditions. The safety relay’s force-guided contacts ensure reliable detection of welded or failed contacts, preventing unsafe restarts. With dual-channel redundancy and mechanical endurance rated for millions of cycles, it withstands repeated emergency stops common in these environments. By guaranteeing a secure and immediate shutdown, it minimizes the risk of serious accidents, protects expensive machines, and maintains productivity even in demanding operating conditions.

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