Phoenix Contact PSR-SPP-24UC/ESA2/4X1/1X2/B Safety Relay

Phoenix Contact PSR-SPP-24UC/ESA2/4X1/1X2/B Safety Relay – Emergency Stop & Safety Door Protection

The Phoenix Contact PSR-SPP-24UC/ESA2/4X1/1X2/B Safety Relay is designed to safeguard machines and operators by monitoring emergency stop buttons and safety doors. Running on 24 V DC, it delivers four force-guided output contacts in a slim 22.5 mm housing, ensuring quick and reliable shutdown. Built to meet international safety levels from SIL 1 up to SIL 3 and Performance Level e, it helps manufacturers stay compliant with global standards. Its fast response, simplified push-in wiring, and robust construction make it a trusted choice for industrial environments where dependable safety is critical.

Engineered for modern automation systems, the PSR-SPP-24UC/ESA2/4X1/1X2/B combines high safety integrity with practical ease of use. A single-channel control design and force-guided relays guarantee reliable fault detection and secure stop functions. The relay resists polarity errors and electrical surges, extending service life in tough operating conditions. Compact dimensions save valuable cabinet space, while built-in LED indicators give quick feedback on status. In practice, this means smoother integration into assembly lines, packaging equipment, and automated cells where worker safety and uptime are priorities. By delivering both compliance and efficiency, it strengthens operational reliability and reduces unplanned downtime.

Why Phoenix Contact PSR-SPP-24UC/ESA2/4X1/1X2/B?
Because it combines compact design, fast reaction times, and compliance with the highest safety categories, the PSR-SPP-24UC/ESA2/4X1/1X2/B is more than just a relay—it’s a trusted safeguard for modern factories. It ensures that emergency stop commands and safety doors are not just monitored but acted upon instantly, giving engineers and operators confidence that both productivity and safety stay uncompromised.

What problem does it solve?
This safety relay solves the critical challenge of protecting people and equipment in automated environments where a split-second response can prevent accidents. It addresses the complexity of integrating reliable safety functions by offering ready-to-use wiring, robust fault detection, and global certification. The result: reduced downtime, enhanced operator security, and compliance without engineering headaches.

Key Features & Specifications – Phoenix Contact PSR-SPP-24UC/ESA2/4X1/1X2/B: 2963954

Download PSR-SPP-24UC/ESA2/4X1/1X2/B 2963954 Datasheet

Commercial Information – Phoenix Contact PSR-SPP-24UC/ESA2/4X1/1X2/B: 2963954

The Applications

1. Worker Safety on Press and Cutting Machines

Presses and cutting systems demand immediate shutdown when operators are at risk. The PSR-SPP-24UC/ESA2/4X1/1X2/B safety relay ensures that when an emergency stop is triggered or a guard is opened, power is instantly disconnected. With force-guided contacts and a reaction time under 100 ms, it prevents dangerous motion from continuing. Its slim 22.5 mm housing fits easily into compact press control panels, ensuring safety integration without consuming valuable cabinet space. This quick, fail-safe response reduces the chance of accidents while maintaining compliance with strict safety standards.

2. Packaging Line with Safety Mats

High-speed packaging environments often use floor mats to detect human presence near moving conveyors. By pairing the mats with the safety relay, manufacturers gain secure monitoring and fault detection capabilities. The relay reacts instantly to any abnormal condition, including wiring faults, to safely stop motion. Built-in LED status indicators help maintenance staff identify issues quickly, reducing downtime and unnecessary stoppages. This combination prevents accidents in fast-moving pack lines while keeping efficiency high, ensuring operators can work safely around automated wrapping or filling systems.

3. Automated Assembly Robot Cell

In robot cells, access doors and gates need to be reliably monitored. The PSR-SPP safety relay supervises interlock switches so that when a door opens, power to the robotic drives is cut immediately. With safety levels reaching SIL 3 and Performance Level e, it satisfies global compliance requirements. Its push-in connection system accelerates wiring during installation or service, making integration easier for system builders. Compact dimensions free up valuable panel space, while fault detection capabilities ensure dependable operation. This setup allows manufacturers to protect personnel without slowing down robot productivity.

4. CNC Machine with Tool Change Enclosure

CNC machines require secure monitoring of enclosure doors during spindle and tool changes. The safety relay evaluates emergency stop and interlock signals, ensuring the spindle halts if a door is opened unexpectedly. Thanks to its force-guided contacts, even internal relay faults are detected and managed safely. The relay’s protection ratings ensure long-term reliability in harsh machine environments with vibration, chips, and coolant. By delivering rapid stop functions and simplifying troubleshooting, it helps keep operators safe while supporting continuous, efficient machining operations.

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