$ 224.71
Phoenix Contact PSR-SPP-24DC/SDC4/2X1/B safety relay ensures SIL3 Cat4 protection with modular TBUS design, compact size, and reliable performance.
The Phoenix Contact PSR-SPP-24DC/SDC4/2X1/B safety relay provides dependable protection for machinery by monitoring emergency stop buttons, safety doors, magnetic switches, and light grids. It supports both single-channel and dual-channel configurations, offering flexible integration into various machine designs. With approvals up to SIL 3, Category 4, and Performance Level e, the relay ensures reliable shutdown in hazardous conditions. Compact dimensions make it ideal for space-limited panels, while its modular design with TBUS interface allows straightforward extension of safety functions across multiple devices.
Built for modern industrial requirements, the PSR-SPP-24DC/SDC4/2X1/B combines advanced safety performance with user-friendly installation. The TBUS modular interface reduces wiring effort and accelerates setup in multi-module systems, making it highly adaptable for expanding production lines. Its two enabling current paths and one signaling output provide both secure power cut-off and system feedback for monitoring. Automatic and manual reset modes allow operators to tailor safety behavior depending on application needs. With durable force-guided contacts and clear LED indicators, the relay ensures long-lasting reliability, simplified diagnostics, and lower maintenance costs—protecting both personnel and equipment in demanding environments.
Why Phoenix Contact PSR-SPP-24DC/SDC4/2X1/B?
Because it blends advanced safety certifications with smart modular design, giving engineers flexibility and peace of mind. With its TBUS interface, dual enabling paths, and compact housing, this relay is more than just a safeguard—it is a future-ready solution that simplifies wiring, adapts to different machine types, and ensures critical protection without compromising valuable cabinet space.
What problem does it solve?
It eliminates the risk of unsafe machine operation by providing a reliable mechanism to cut power instantly when hazards arise. Whether triggered by emergency stops, open safety gates, broken light grids, or faulty magnetic switches, the relay ensures the machine cannot restart until conditions are safe. This makes it essential for protecting workers, preventing costly equipment damage, and maintaining compliance with strict global safety standards.
| Feature | Details | Benefit |
|---|---|---|
| Safety Standards | SIL 3, Cat. 4, PL e | Meets the highest machine safety compliance levels. |
| Nominal Input Voltage | 24 V DC | Optimized for industrial control applications. |
| Control Modes | 1- or 2-channel, auto/manual reset | Flexible operation to suit different safety system designs. |
| Outputs | 2 enabling paths, 1 signaling output | Provides reliable shutdown and feedback to controllers. |
| TBUS Interface | Modular system connection | Reduces wiring effort and enables easy system expansion. |
| Switching Capacity | Up to 6 A | Handles high-demand safety loads with confidence. |
| Mechanical Service Life | Approx. 10 million cycles | Long lifespan lowers maintenance and replacement costs. |
| Connection Type | Push-in pluggable terminals | Quick, secure wiring without tools. |
| Housing Dimensions | 22.5 × 112 × 114.5 mm | Compact size saves valuable control cabinet space. |
| Protection Class | IP20 (device), IP54 (installation) | Safe operation when correctly installed in cabinets. |
Download Phoenix Contact PSR-SPP-24DC/SDC4/2X1/B 2981499 Datasheet
| Commercial Data | Details |
|---|---|
| GTIN Number | 4046356051699 |
| Tariff Number | 85371098 |
| Weight | 197.9 g (net), 228 g (gross) |
| Country of Origin | Germany (DE) |
Conveyor lines in warehouses and production plants must stop immediately when danger is detected. The PSR-SPP-24DC/SDC4/2X1/B safety relay ensures this by cutting motor power through dual enabling paths the moment an emergency stop is activated. Its certified SIL 3 and Cat. 4 performance guarantees redundancy, so even if one channel fails, safety is not compromised. The modular TBUS system makes it easy to expand protection across multiple conveyor zones without complex rewiring. This reliability prevents accidents, minimizes equipment damage, and supports efficient operation in facilities where speed and safety are equally critical.
Industrial robots often operate inside enclosed cells, requiring reliable door interlocks to protect operators. The PSR-SPP-24DC/SDC4/2X1/B monitors gate switches and stops robotic motion instantly if a gate is opened. Compact dimensions allow it to fit into tight control cabinets, while clear LED indicators give technicians instant visibility of status and faults. The TBUS connectivity simplifies wiring when integrating several modules across a cell, making it ideal for flexible manufacturing environments where layouts change frequently. This application ensures workers can only access the robot area when it is completely safe, reducing risks of injury or equipment malfunction.
Packaging machinery uses light grids to safeguard operators from moving parts such as cutters, sealers, or conveyors. The PSR-SPP-24DC/SDC4/2X1/B provides fast response when a light beam is broken, shutting down hazardous motion through its enabling outputs. Its endurance of millions of cycles ensures consistent operation in environments with frequent interruptions. The device’s straightforward push-in terminals simplify installation and servicing, while its compact housing saves valuable panel space. By combining rapid shutdown, high durability, and easy integration, the relay ensures packaging lines maintain worker safety without sacrificing productivity or throughput.
CNC machines often incorporate several safety elements, such as guard doors, magnetic switches, and emergency stops. The PSR-SPP-24DC/SDC4/2X1/B is well suited for handling multiple monitoring points, instantly disabling hazardous motion when a fault is detected. Its modular TBUS system reduces wiring complexity across large machine setups, making integration straightforward. With options for automatic or manual reset, safety strategies can be matched to workshop policies. Long mechanical life and robust performance reduce downtime caused by component wear. This makes it a reliable backbone for protecting both operators and high-value machines in precision engineering environments.
| Category | Model / Name | Part Number | Benefit |
|---|---|---|---|
| DIN Rail Bus Connector | PSR-TBUS | 2890425 | Provides cross-wiring between safety modules, enabling modular expansion without complex cabling. |
| DIN Rail Bus Connector (1 PCS) | PSR-TBUS (1PCS) | 1326060 | Compact version for single-unit installations, ensuring compatibility with the PSR safety relay family. |
| Blind Plug for Bus Connector | PSR-TBUS-TP | 2981716 | Protects unused bus connector slots, maintaining system integrity and preventing incorrect wiring. |
| Crimping Tool | CRIMPFOX 6 | 1212034 | Professional tool for crimping ferrules (0.25–6.0 mm²), ensuring secure and reliable wire connections. |
| Mounting Option | Standard DIN Rail | — | Universal mounting option for quick installation into industrial control cabinets. |
| Alternative Relays | PSRclassic Series | Various | Same product family with different safety configurations to match specific application requirements. |
For expert guidance before placing your order.
Warranty – 1-year warranty for your peace of mind.
Global Shipping – We ship worldwide with secure packaging and reliable delivery.
Technical Support – Contact us for professional after-sales technical assistance.
