Wago 750-435 1Di Namur Ex I

Why Choose the WAGO 750-435 NAMUR Digital Input Module?

The WAGO 750-435 is a specialised 1-channel NAMUR digital input module designed for the WAGO I/O System 750. It enables PLCs and industrial controllers to monitor signals from NAMUR sensors and intrinsically safe field devices, making it ideal for hazardous area monitoring within process automation systems.

The module records binary signals from sensors operating in Zone 0 and Zone 1 hazardous environments. NAMUR sensors, optocouplers, and mechanical contacts can be connected via approved intrinsically safe devices, allowing reliable signal acquisition in explosive atmospheres. :contentReference

Each connected sensor receives a short-circuit-protected 8.2 V supply, while built-in diagnostics detect wiring faults such as short circuits or wire breaks. The module integrates seamlessly with WAGO fieldbus couplers and controllers, providing safe and reliable monitoring for critical industrial processes. :contentReference

Key Advantages

• Specialised NAMUR digital input module for hazardous environments.
• Compatible with NAMUR sensors and intrinsically safe field devices.
• Supports Zone 0 and Zone 1 sensor connections.
• Short-circuit protected 8.2 V sensor supply.
• Integrated diagnostics for wire break and short circuit detection.
• Compact DIN rail design for distributed automation systems.

Key Features

• 1 digital input channel.
• NAMUR signal interface.
• 8.2 V sensor supply with short-circuit protection.
• High-side switching input characteristic.
• 3 ms digital input filter.
• 2-wire sensor connection.
• LED indicators for signal status and diagnostics.
• DIN rail mounted modular design.

Technical Specifications

• Manufacturer: WAGO
• Series: WAGO I/O System 750
• Model: 750-435
• Module type: NAMUR digital input module
• Number of inputs: 1 channel
• Signal type: NAMUR
• Sensor connection: 2-wire NAMUR sensor
• Sensor supply voltage: 8.2 V DC (short-circuit protected)
• Signal current (0): ≤ 1.2 mA
• Signal current (1): ≥ 2.1 mA
• Input filter: approx. 3 ms
• Diagnostics: Wire break and short-circuit detection
• Isolation: Electrical isolation between field and system levels
• System supply voltage: 5 V DC via system bus
• Field supply voltage: 24 V DC (Ex i power supply)
• Connection technology: CAGE CLAMP® spring terminals
• Mounting: 35 mm DIN rail
• Module width: approx. 12 mm
• Protection rating: IP20
• Operating temperature: approx. 0 °C to +55 °C
• Explosion protection: ATEX / IECEx intrinsically safe Ex i

Hazardous Area Sensor Monitoring

NAMUR sensors are commonly used in hazardous industrial environments such as chemical plants, oil refineries and pharmaceutical production facilities. They operate using defined current levels to represent switching states, allowing intrinsically safe monitoring without the risk of ignition.

The WAGO 750 Series provides a modular distributed I/O platform that allows engineers to integrate hazardous area sensor signals into modern PLC control systems. This architecture enables safe monitoring of process equipment while maintaining reliable communication with automation controllers.

Typical Applications

• Monitoring NAMUR proximity sensors in hazardous areas.
• Process automation and instrumentation systems.
• Oil and gas production facilities.
• Chemical processing and refinery installations.
• Industrial safety and hazardous area monitoring systems.

Trusted by Automation Engineers

WAGO 750 Series I/O modules are widely used by system integrators and process automation engineers to build reliable distributed control systems across industrial and hazardous environments.