Wago 750-406 2Di, 120 Vac

Why Choose the WAGO 750-406 2-Channel Digital Input Module?

The WAGO 750-406 is a compact 2-channel digital input module designed for the WAGO I/O System 750. It enables controllers to monitor 120 V AC digital signals from switches, sensors and other field devices, allowing accurate detection of machine states in industrial automation systems.

The module receives control signals from connected devices and transmits the input status to a fieldbus coupler or WAGO programmable controller. With its high-side switching input characteristic and integrated signal filtering, the module ensures reliable signal processing even in electrically noisy environments. :contentReference

Designed for flexible installation, the module supports 2-wire, 3-wire and 4-wire sensor connections. The use of CAGE CLAMP® spring pressure terminals ensures vibration-resistant wiring and fast installation within control cabinets, while the slim 12 mm DIN rail form factor allows high-density automation system designs. :contentReference

Key Advantages

• Reliable 2-channel digital input interface for industrial automation systems.
• Supports 120 V AC digital control signals.
• Compatible with the modular WAGO 750 Series I/O platform.
• High-side switching inputs for dependable signal detection.
• CAGE CLAMP® terminals provide secure and maintenance-free wiring.
• Compact DIN rail design ideal for high-density control panels.

Key Features

• 2 digital input channels.
• 120 V AC input signal voltage.
• High-side switching input characteristic.
• Supports 2-wire, 3-wire and 4-wire field device connections.
• 10 ms digital input filter for stable signal detection.
• LED indicators for each input channel.
• CAGE CLAMP® spring terminals for fast installation.
• Compatible with WAGO 750 Series fieldbus couplers and controllers.

Technical Specifications

• Manufacturer: WAGO
• Series: WAGO I/O System 750
• Model: 750-406
• Module type: Digital input module
• Number of inputs: 2 channels
• Input signal voltage: 120 V AC
• Voltage range signal 0: 0–20 V AC
• Voltage range signal 1: 79 V AC to 1.1 × nominal voltage
• Input current per channel: approx. 4.5 mA
• Input filter: 10 ms
• Signal frequency: 45–65 Hz
• Isolation: approx. 1.5 kV between field and system
• Connection technology: CAGE CLAMP® spring terminals
• Mounting: 35 mm DIN rail
• Protection rating: IP20
• Operating temperature: approx. 0 °C to +55 °C

Industrial AC Signal Monitoring

Many industrial machines use AC control signals from switches, relays and signalling devices. Digital input modules allow controllers to capture these signals and convert them into process data that PLCs and automation systems can interpret and respond to.

The modular architecture of the WAGO 750 Series enables distributed I/O installations where signals from sensors and field devices can be collected close to machinery and transmitted to central control systems. This reduces wiring complexity and improves system scalability.

Typical Applications

• Monitoring AC control signals in industrial machinery.
• Switch and relay status detection.
• PLC monitoring of field device signals.
• Building automation and facility monitoring systems.
• Distributed control systems for industrial automation.

Trusted by Automation Engineers

WAGO 750 Series I/O modules are widely used by machine builders and system integrators to deliver reliable distributed automation systems across manufacturing, processing and infrastructure environments.