$ 93.38
Phoenix Contact EMG 17-REL/KSR-120/21-21-LC AU relay with safe isolation, dual changeover contacts, and compact DIN-rail design for automation.
The Phoenix Contact EMG 17-REL/KSR-120/21-21-LC AU relay module is engineered to provide reliable switching for a wide range of applications, from low-signal circuits to higher power loads. Operating with a 120 V AC/DC input, it ensures dependable separation between coil and contacts for increased safety in electrical systems. The design integrates suppression and input circuitry, minimizing interference and improving system stability. With two changeover contacts and a slim DIN-rail format, this module offers space efficiency and robust performance, making it an excellent choice for engineers who demand reliability in industrial automation and control setups.
The Phoenix Contact EMG 17-REL/KSR-120/21-21-LC AU delivers practical benefits by combining compact construction with advanced safety features. Its hard gold-plated AgNi contacts provide secure switching performance, handling both small signals and higher loads when required. Reinforced insulation and high surge resistance enhance protection against electrical stresses, ensuring long service life even in challenging conditions. Added conveniences such as a visual status LED and built-in rectifier reduce wiring complexity and ease troubleshooting. For industries requiring continuous, safe, and efficient operation, this module translates into lower maintenance needs, improved uptime, and dependable integration into automation systems.
The Phoenix Contact EMG 17-REL/KSR-120/21-21-LC AU stands out for its combination of compact design, safe isolation, and versatile switching capability. With gold-plated AgNi contacts, a built-in rectifier, and surge-resistant insulation, it delivers reliability where consistency matters most. This makes it a trusted relay module for engineers who want efficiency, safety, and long-lasting durability in demanding automation and control systems.
This relay module addresses the challenge of safely switching between small signals and large loads in a single, compact unit. It prevents electrical interference, ensures separation between coil and contacts, and withstands high surge conditions that could otherwise damage equipment. By integrating suppression circuits and LED indication, it eliminates extra wiring complexity, reduces downtime, and solves the common issues of unreliable switching in industrial environments.
| Feature | Details | Benefit |
|---|---|---|
| Nominal Input Voltage | 120 V AC/DC (range: 96–132 V) | Ensures stable operation across common industrial supply ranges |
| Contact Configuration | 2 changeover contacts (AgNi + hard gold plating) | Reliable switching for both low signals and higher loads |
| Safe Isolation | Reinforced insulation, up to 6 kV surge withstand | Protects sensitive systems from electrical faults and surges |
| Integrated Circuits | Input circuit with bridge rectifier & suppression | Reduces interference, simplifies wiring, and increases reliability |
| Switching Capacity | Up to 1250 VA (250 V AC) / 120 W (24 V DC) | Handles demanding applications with consistent performance |
| Service Life | Approx. 20 million mechanical cycles | Long operational life reduces maintenance costs |
| Response & Release Time | Response 8 ms / Release 10 ms | Fast switching improves control accuracy in automation |
| Visual Indicator | Yellow LED for operating status | Easy troubleshooting and monitoring in real time |
| Mounting Type | DIN rail, any position | Quick installation and flexible placement |
| Dimensions | 17.5 × 75 × 62.5 mm (W × H × D) | Compact design saves panel space |
| Operating Temperature | -20 °C to +40 °C | Suitable for standard industrial environments |
| Standards & Approvals | UL, cUL, EAC, EN 61810-1 | Certified for global use and compliance assurance |
| Country of Origin | Germany | High-quality European manufacturing standard |
Download Phoenix Contact EMG 17-REL/KSR-120/21-21-LC AU 2941455 Datasheet
| Commercial Data | Details |
|---|---|
| GTIN Number | 4017918080457 |
| Tariff Number | 85364190 |
| Weight per Piece | 57.41 g |
| Country of Origin | Germany |
Modern PLCs often generate control signals that are too weak to drive heavy loads directly. This relay module bridges that gap by isolating and amplifying the signal, enabling it to switch motors, valves, or solenoids without risking the controller. The reinforced insulation prevents voltage spikes from damaging sensitive electronics, while the dual changeover contacts allow engineers to manage two circuits at once. This simplifies panel design and extends the lifespan of automation equipment.
Alarm and monitoring systems require dependable signal switching to ensure accurate alerts. With gold-plated contacts and built-in suppression, this relay guarantees clear signal transmission even when only tiny currents are present. Its resistance to electrical noise means fault alarms or emergency triggers are reliably communicated to central panels. In critical applications such as fire detection or access monitoring, the module provides the consistency and stability that operators depend on to protect people and assets.
Industrial motors require precise control during startup and operation. This relay module supports functions like bypassing soft-starters or switching between different connection schemes. Its fast response and release times ensure transitions happen smoothly, avoiding mechanical shocks and downtime. The module’s ability to handle higher inrush currents also makes it suitable for managing demanding motor circuits. By integrating interference suppression, it minimizes external components, saving time in both design and maintenance.
In large industrial plants, signals often need to travel long distances through noisy environments. This relay module helps condition and isolate those signals before they are forwarded to a central control system. Its compact DIN-rail design makes it easy to install in remote enclosures, while safe isolation prevents ground loops and signal loss. Engineers can rely on its stable performance to maintain communication integrity across distributed systems, ensuring reliable automation in complex facilities.
| Category | Model | Part Number | Description | Benefit |
|---|---|---|---|---|
| Accessory | EMG-GKS 12 | 2947035 | Device marking label, width 12 mm, area 12 × 8 mm | Provides clear labeling for relay modules, improving traceability and safety |
| DIN Rail NS 35 Series | – | Standard mounting rail, steel or aluminum versions | Secure and quick mounting of relay modules in control cabinets | |
| PLC-BSC Series Socket | – | Relay base socket with screw or spring connection | Simplifies relay replacement and wiring in modular systems | |
| Related Product | EMG 17-REL/KSR-24/21-21-LC | – | Relay module variant with 24 V coil voltage | Suitable alternative when lower control voltage is required |
| EMG 17-REL/KSR-230/21-21-LC | – | Relay module variant with 230 V AC/DC input | Ideal for systems powered by higher voltage supply lines | |
| EMG-SE Series | – | Relay modules with extended safety features | For applications needing higher reliability or redundancy | |
| Accessory | EMG Marking Accessories (e.g., EML adhesive labels) | – | Marking labels compatible with EMG relays | Supports efficient maintenance and visual identification |
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Warranty – 1-year warranty for your peace of mind.
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