$ 186.07
Phoenix Contact PSR-MS50-1NO-1DO-24DC-SC safety relay, SIL 3, PL e rated, compact 6.8 mm design for reliable machine and operator safety.
The Phoenix Contact PSR-MS50-1NO-1DO-24DC-SC safety relay is a compact solution for advanced machine safety. Built to monitor non-equivalent signal generators, it achieves the highest levels of functional safety, including SIL 3 and Performance Level e. With a slim housing of just 6.8 mm, it is ideal for control panels where space is limited. Operating on 24 V DC, this unit provides both an enabling current path and a digital output signal, ensuring dependable and consistent protection for operators and equipment in demanding industrial environments.
Designed for continuous use in industrial safety applications, the PSR-MS50-1NO-1DO-24DC-SC combines compact form with robust performance. Its two-channel monitoring principle enhances system reliability by ensuring redundancy, while automatic start-up simplifies commissioning. With short reaction times, the relay delivers quick system responses, critical in applications like safety doors, emergency stop functions, or machine guarding. Its durability under shock, vibration, and wide temperature ranges ensures long service life, reducing downtime and maintenance costs. This makes it an efficient, future-proof solution for industries seeking high-performance safety in minimal space.
Why Phoenix Contact PSR-MS50-1NO-1DO-24DC-SC?
Because it delivers high-level safety in the slimmest form. With only 6.8 mm width, this relay ensures SIL 3 and PL e compliance without sacrificing space. Its dual-channel monitoring, fast response, and automatic activation make it a trusted safeguard where compactness and uncompromised reliability are crucial.
What problem does it solve?
It eliminates safety risks in complex automation by monitoring non-equivalent signal generators with redundancy and precision. This ensures machinery stops immediately in hazardous conditions, protecting both people and equipment. By combining space efficiency with top-tier safety standards, it solves the challenge of integrating advanced protection in modern, space-limited control cabinets.
| Feature | Details | Benefit |
|---|---|---|
| Housing Width | 6.8 mm | Saves valuable cabinet space while maintaining performance |
| Safety Rating | SIL 3 (IEC 61508/62061), Cat. 4, PL e (EN ISO 13849) | Meets the highest safety integrity standards |
| Control Principle | Two-channel, non-equivalent | Provides redundancy for increased system reliability |
| Operating Voltage | 24 V DC (20.4…26.4 V DC) | Stable power operation in industrial environments |
| Outputs | 1 enabling current path (6 A), 1 digital signal output | Reliable machine shutdown and clear feedback |
| Response Time | <175 ms | Fast reaction enhances operator protection |
| Release Time | <20 ms | Immediate disconnection during hazardous conditions |
| Operating Temperature | -40 °C … +60 °C | Reliable performance in diverse environments |
| Mounting | DIN rail, vertical or horizontal | Flexible installation in control cabinets |
| Approvals | CE, cULus | Globally accepted compliance for safety-critical use |
Download Phoenix Contact PSR-MS50-1NO-1DO-24DC-SC 2904956 Datasheet
| Commercial Data | Details |
|---|---|
| GTIN Number | 4046356904063 |
| Customs Tariff Number | 85371098 |
| Weight (Net / With Packaging) | 69 g / 78.3 g |
| Country of Origin | Germany |
In automated production lines, protective doors and covers are often fitted with magnetic sensors. By integrating this safety relay in a dual-channel configuration, the system ensures both sensors confirm closure before machinery can restart. This setup eliminates the risk of accidental start-up when a single sensor fails, while the automatic start feature helps keep production moving smoothly after safe conditions are restored.
Machine tools such as presses and milling systems require rapid shutdown when emergencies occur. This relay provides a direct cut-off to the enabling current path, achieving an instant stop when the emergency switch is pressed. Its fast release time ensures quick disconnection of hazardous motion, protecting operators and preventing costly damage to high-speed or high-inertia equipment.
In packaging facilities, maintenance and material changes often involve frequent door openings. The PSR-MS50 relay can be wired to safety interlock switches so that machines remain off whenever a door is open. Once the guard is closed and both safety channels are satisfied, the automatic start allows the system to resume immediately, reducing downtime while maintaining the required safety integrity.
Large conveyor installations use multiple guards and gates that must be monitored continuously. This safety relay enables two-channel monitoring of magnetic switches along different conveyor sections, ensuring faults or attempts to bypass safety circuits are detected. Its slim housing allows dense installation across panels, and quick diagnostic feedback helps maintenance teams reduce downtime while maintaining uninterrupted safety coverage.
| Category | Model / Accessory | Part Number | Benefits |
|---|---|---|---|
| Safety Relay | PSR-MS50-1NO-1DO-24DC-SC | 2904956 | Main safety relay with SIL 3, PL e certification for machine protection |
| Marker System | ZBF 6:UNBEDRUCKT (Zack Marker Strip, flat) | 0808710 | Provides clear labeling for terminal blocks, improves maintenance and panel clarity |
| Crimping Tool | CRIMPFOX 6 – Crimping Pliers | 1212034 | Ensures reliable wire connections for ferrules, supporting long-term electrical safety |
| Marker System | ZBF 6 (Custom Marked) | Various | Enables custom labeling of safety relay terminals for better traceability |
| Mounting Accessories | DIN Rail (standard EN 60715) | – | Required for secure installation of the safety relay in control cabinets |
| Additional Relays (PSRmini series) | PSR-MS50 variants (different contacts / channels) | Series dependent | Extend system capability by combining multiple PSRmini modules for complex safety setups |
For expert guidance before placing your order.
Warranty – 1-year warranty for your peace of mind.
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Technical Support – Contact us for professional after-sales technical assistance.
