$ 60.49
Phoenix Contact PLC-RPT-72UC/21AU/RW relay ensures reliable railway signal switching with wide voltage range, shock resistance, and compact design.
The Phoenix Contact PLC-RPT-72UC/21AU/RW relay module is a robust solution for railway and heavy-duty applications, offering precise signal switching with a 72 V DC input. Built with a compact 6.2 mm design and push-in connection technology, it ensures quick installation and dependable operation. Certified to railway standards, it withstands extreme temperatures from -40 °C to +70 °C, as well as vibration and shock stresses. Its safe electrical isolation between coil and contact sides provides secure protection for control systems, making it a reliable choice for use in demanding rolling stock environments or industrial control panels.
The PLC-RPT-72UC/21AU/RW relay module delivers consistent performance where reliability matters most. Its wide input tolerance and gold-plated contacts ensure stable operation even with voltage variations, reducing failures and costly downtime. With a service life exceeding 20 million mechanical cycles, it offers long-term durability while keeping maintenance minimal. The slim DIN rail mount design optimizes space in crowded cabinets, while integrated protection circuits safeguard against electrical surges. Ideal for railway vehicles, signaling systems, and rugged industrial sites, this relay module combines safety, efficiency, and ease of use to meet the high standards required in critical applications.
Why Phoenix Contact PLC-RPT-72UC/21AU/RW?
Because it combines railway-grade durability with compact design and safe isolation, the Phoenix Contact PLC-RPT-72UC/21AU/RW ensures consistent relay performance even under extreme temperature, vibration, and voltage fluctuations. It saves space, reduces maintenance effort, and guarantees reliability where continuous operation is essential.
What problem does it solve?
This relay module addresses the challenge of dependable switching in harsh and mobile environments. It eliminates failures caused by unstable voltage, vibration, or environmental stress, providing engineers with a secure, long-lasting interface for railway vehicles, signaling systems, and industrial automation where standard relays fall short.
| Feature | Details | Benefit |
|---|---|---|
| Nominal Input Voltage | 72 V DC | Tailored for railway and industrial applications |
| Input Voltage Range | 50.4 V to 90 V DC | Stable operation despite voltage fluctuations |
| Contact Type | 1 Changeover (AgSnO with hard gold plating) | Reliable switching with long contact life |
| Operating Temperature | -40 °C to +70 °C (short-term +85 °C) | Suitable for extreme railway and industrial environments |
| Shock & Vibration Resistance | EN 50155 & EN 61373 certified | Reliable performance in mobile and harsh conditions |
| Insulation Voltage | 250 V AC / 4 kVrms test | Safe isolation between coil and contact for system protection |
| Service Life | >20 million mechanical cycles | Minimizes maintenance costs and downtime |
| Connection Method | Push-in terminal, 0.14–2.5 mm² conductors | Quick installation and secure wiring |
| Mounting Type | DIN rail (6.2 mm wide housing) | Saves cabinet space with easy integration |
| Integrated Protection | Freewheeling diode, RCZ filter | Safeguards against surges and extends module lifespan |
| Approvals & Standards | EN 50155, EN 50121, CE, UKCA, UL | Certified for global use in critical applications |
Download Phoenix Contact PLC-RPT-72UC/21AU/RW 2900322 Datasheet
| Commercial Data | Details |
|---|---|
| GTIN Number | 4046356510059 |
| Customs Tariff Number | 85364900 |
| Weight per Piece | 33.36 g |
| Country of Origin | Germany (DE) |
Modern train control systems depend on relays that can tolerate constant vibration and electrical noise without failure. The PLC-RPT-72UC/21AU/RW relay module provides stable isolation between sensitive controller inputs and noisy sensor outputs, ensuring signals reach the central unit without interruption. Its wide operating voltage range allows the relay to continue functioning even when onboard power drops during acceleration or braking. By maintaining accurate signal transmission in these conditions, the relay helps prevent false alarms, enhances passenger safety, and supports reliable train operation across varying environments.
At railway crossings, gate actuators and warning lights must respond precisely and quickly. Voltage fluctuations or sudden surges often cause unreliable switching in conventional relays. The PLC-RPT-72UC/21AU/RW solves this by offering a broad input tolerance and built-in surge protection. This ensures gates close on time and warning signals activate correctly, even during unstable supply conditions. Its shock and vibration resistance makes it ideal for outdoor roadside cabinets where mechanical stress is frequent. As a result, operators gain higher system reliability, minimizing service interruptions and improving safety for both rail and road users.
Trains host multiple subsystems such as heating, cooling, and lighting that must be managed efficiently. The PLC-RPT-72UC/21AU/RW allows operators to switch these loads dynamically while conserving available energy. Its low coil current reduces power demand on the control side, while the durable gold-plated contacts maintain dependable switching performance across millions of cycles. Because it is compact and DIN-rail mounted, it fits easily into crowded control panels onboard. By selectively enabling or disabling auxiliary equipment, the relay helps ensure uninterrupted supply to critical systems while extending the life of electrical infrastructure.
Railway substations often operate in remote, unmanned locations where environmental extremes challenge electronic equipment. The PLC-RPT-72UC/21AU/RW is well suited for these conditions, thanks to its ability to withstand wide temperature ranges and maintain reliable contact integrity. Its strong electrical isolation prevents disturbances in the field from damaging sensitive control electronics. With long mechanical service life and minimal maintenance needs, it ensures stable signal switching for interlocking systems, signal lamps, and track circuits. This reliability reduces the need for field interventions and contributes to safer, more efficient railway operations over the long term.
| Category | Model / Accessory | Part Number | Benefit / Use Case |
|---|---|---|---|
| Bridging Accessories | FBST 500-PLC RD (Red Continuous Plug-in Bridge) | 2966786 | Enables continuous potential bridging, up to 32 A load capacity |
| FBST 500-PLC BU (Blue Continuous Plug-in Bridge) | 2966692 | Provides easy, color-coded potential distribution for PLC modules | |
| FBST 500-PLC GY (Gray Continuous Plug-in Bridge) | 2966838 | Standard gray bridging solution for organized wiring | |
| FBST 6-PLC RD (Red Single Plug-in Bridge) | 2966236 | For short bridging across 2 terminals, compact and efficient | |
| FBST 6-PLC BU (Blue Single Plug-in Bridge) | 2966812 | Simplifies quick bridging with clear identification | |
| FBST 6-PLC GY (Gray Single Plug-in Bridge) | 2966825 | Gray coding for standard applications in compact panels | |
| FBST 8-PLC GY (Gray Single Plug-in Bridge) | 2967688 | 8 mm length for extended bridging in modular setups | |
| Marking Accessories | ZB 6:UNBEDRUCKT (Unmarked Marker Strip) | 1051003 | For custom labeling of PLC modules with printers |
| ZB 6 CUS (Customized Marker Strip) | 0824992 | Delivered pre-labeled to customer requirements | |
| ZB 6, LGS:FORTL.ZAHLEN (Sequential Numbers) | 1051016 | Preprinted with sequential numbering for easy identification | |
| ZB 6, QR:FORTL.ZAHLEN (Vertical Numbering) | 1051029 | Vertical numbering for compact labeling in tight spaces | |
| ZB 6, LGS:GLEICHE ZAHLEN (Identical Numbers) | 1051032 | Provides identical printed numbers for repeated labeling | |
| ZB 6, LGS:L1-N,PE (Phase Markers) | 1051414 | Preprinted with L1, L2, L3, N, PE for quick phase identification | |
| ZB 6, LGS:U-N (Voltage Markers) | 1051430 | Preprinted U, V, W, N, GND labels for clear wiring setup | |
| UC-TM 6 (Marker Sheet, Unmarked) | 0818085 | Blank marker sheet for flexible labeling on-site | |
| UC-TM 6 CUS (Customized Sheet) | 0824589 | Delivered preprinted to specification, saving time | |
| UCT-TM 6 (Marker Sheet, Unmarked) | 0828736 | Compatible with multiple Phoenix Contact marking systems | |
| UCT-TM 6 CUS (Customized Sheet) | 0829602 | Tailored factory-printed labeling for PLC installations | |
| Mounting Accessories | NS 35/7,5 DIN Rails (Perf/Unperf, Steel/Alu/Cu) | Multiple (0801733, 0801681, 0801704, etc.) | Standard DIN mounting rails in various materials and finishes |
| NS 35/15 DIN Rails (Perf/Unperf, Steel/Alu/Cu) | Multiple (1201730, 1201714, 1201756, etc.) | Higher profile rails for robust mounting in cabinets | |
| NS End Caps (NS 35/7.5 CAP, NS 35/15 CAP) | 1206560, 1206573 | End pieces for safe termination of DIN rails | |
| Safety & Separation | PLC-ATP BK (Separating Plate) | 2966841 | Provides safe isolation of voltages in adjacent modules |
| Power Distribution | PLC-ESK GY (Power Terminal Block) | 2966508 | Distributes up to four potentials within the PLC interface |
| Tools | SZF 1-0,6×3,5 (Screwdriver) | 1204517 | Actuation tool for secure and safe wiring |
| Replacement Relay | REL-MR-48DC/21AU | 2961244 | Plug-in miniature relay replacement for maintenance needs |
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.
