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857-304 Wago Relay module;Nominal input voltage: 24 VDC;1 changeover contact;gray
WAGO 857-304 signal conditioner with galvanic isolation for industrial analogue signals such as 4-20 mA and 0-10 V.
£12.17
Why Choose the WAGO 857-304 Relay Module?
The WAGO 857-304 is a compact and reliable DIN rail relay module designed for industrial automation, electrical control panels and interface switching applications. Featuring a 24 V DC input voltage, a single changeover contact and integrated LED status indication, this relay module provides dependable signal isolation and switching performance for modern control systems.
The 857-304 combines a miniature plug-in relay with a slim integrated socket design, allowing efficient installation in compact control cabinets. Its narrow 6 mm module width saves valuable DIN rail space while maintaining reliable switching capability for industrial automation and control applications.
Designed with WAGO relay technology, the 857-304 provides electrical separation between control and load circuits while supporting loads up to 6 A continuous current. The integrated yellow LED status indicator provides clear operational feedback for commissioning, troubleshooting and maintenance.
Key Advantages
- Compact DIN rail relay module for industrial control applications.
- 24 V DC coil/input voltage suitable for automation systems.
- 1 changeover contact (SPDT) provides flexible switching options.
- 6 mm slim housing optimises control cabinet space.
- Integrated yellow LED status indication for easy diagnostics.
- Reliable WAGO solution for signal isolation and switching applications.
Key Features
- WAGO 857 relay module series.
- Model: 857-304.
- Product type: Relay module.
- Nominal input voltage: 24 V DC.
- Contact configuration: 1 changeover contact.
- Contact type: SPDT / 1 Form C.
- Status indicator: Yellow LED.
- Contact material: AgSnO₂.
- Mounting: DIN 35 rail mounting.
Reliable Signal Switching for Industrial Automation
Relay modules such as the WAGO 857-304 provide electrical isolation between control circuits and switched loads, allowing PLC outputs, sensors and automation controllers to safely operate external devices. This makes them essential components in industrial interface and signal conditioning applications.
The slim 857 series design allows high-density installation in electrical cabinets while maintaining reliable switching performance. The combination of compact dimensions, LED indication and dependable relay technology makes the 857-304 suitable for demanding industrial environments.
Typical Applications
- Industrial automation control panels.
- PLC interface systems.
- Machine control cabinets.
- Building automation systems.
- Signal isolation and switching circuits.
- Industrial electrical installations.
Technical Specifications
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| Device Type | Interface Relay | |
|---|---|---|
| Mounting Type | DIN rail | |
| Series | Signal Conditioner | |
| Product type | Analogue signal conditioner | |
| Input signals | 0–10 V, 4–20 mA (typical industrial signals) | |
| Output signals | 0–10 V or 4–20 mA | |
| Isolation | Galvanic isolation between circuits | |
| Mounting type | DIN rail (TS35) | |
| Power supply | 24 V DC typical | |
| Housing | Slim DIN rail module | |
| Application | Industrial signal isolation and conversion | |
| HS Code | 85364900 | |
| Country of Manufacture | China |
Frequently Asked Questions
What is the WAGO 857-304 used for?
The WAGO 857-304 is a DIN rail relay module used for signal switching, electrical isolation and interface control in industrial automation systems.
What input voltage does the WAGO 857-304 require?
The relay module operates with a 24 V DC input voltage.
What type of contact does the 857-304 provide?
The module provides a single changeover contact (SPDT) for flexible switching applications.
What is the maximum current rating of the relay module?
The WAGO 857-304 supports a 6 A continuous current rating.
How is the WAGO 857-304 installed?
The relay module is designed for DIN 35 rail mounting inside industrial control cabinets.
Trusted by Industrial Automation Professionals
WAGO 857 series relay modules are widely used by automation engineers and electrical professionals to provide dependable switching, electrical isolation and efficient control cabinet integration.
