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WAGO: Hazardous location relay module

Via internal system voltage, WAGO Corporation’s new 2-Channel Relay Output Module directly activates Intrinsically Safe circuits, powering actuators in hazardous locations.

Pw 55425 Wago Ex Relay Release

This content was written and submitted by the supplier. It has only been modified to comply with this publication’s space and style.

Unlike traditional solid-state hazardous location relays, the unique 750-538 carries two changeover contacts for activating Zone 0/20 and 1/21 devices, e.g., relays, solenoid valves, contactors or optical/acoustic signal generators. This supports diverse hazardous location applications in oil/gas processing, wastewater treatment, brewing/distillation and more.

The electro-mechanical 750-538’s switching voltage/current is rated 125 VAC/0.5 A and 30 VDC/1 A; the maximum permissible limits depend on the actuator's location per EN 60079-11. 750-538’s Normal Open (NO) contacts are electrically isolated; on-board LEDs indicate relay switching status. To ensure connection reliability within operating temperatures of 0°C to +60°C, 750-538 employs CAGE CLAMP® Spring Pressure Technology.

750-538 joins WAGO’s growing EX i portfolio of nearly 20 Intrinsically Safe Modules and power supplies. Highly modular digital, analog and specialty modules are available 1-,
2-, 4- or 8-channels — users only purchase the I/O needed. All EX i devices are compatible with WAGO-I/O-SYSTEM buscouplers, PLCs and IPCs.

Barrier-Free Controls:
The WAGO-I/O-SYSTEM is designed for non-hazardous areas or in Zone 2/22. It integrates Zone 0/22 and 1/21-based sensors and actuators via intrinsically safe Ex i modules without additional devices (e.g., Zener barriers). This safely and economically brings standard fieldbus technology to Ex i applications, befitting process (grain/coal mills, bio-gas/cement plants) and energy industries (petroleum production).

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