Wago 750-667/000-004 4FDI/4FDO

Why Choose the WAGO 750-667/000-004 PROFIsafe Digital Input and Output Module?

The WAGO 750-667/000-004 is a fail-safe digital input and output module designed for integration within the WAGO I/O System 750. It provides four fail-safe digital inputs and four fail-safe digital outputs, enabling safety sensors and actuators to be integrated directly into PLC-based automation systems using the PROFIsafe safety protocol.

This safety I/O module allows industrial safety devices such as emergency stop switches, safety interlock switches, mode selectors and safety sensors to be monitored while simultaneously controlling safety actuators such as contactors or shutdown circuits. The integrated architecture simplifies safety system design by combining monitoring and control functions in a single module. :contentReference

Each of the four digital inputs is clock-sensitive and monitored using dedicated test pulses, enabling detection of wiring faults such as cross-circuits, short circuits and external voltage supply conditions. The fail-safe outputs can switch both resistive and inductive loads with up to 2 A output current per channel, allowing direct control of safety actuators. :contentReference

Key Advantages

• Combined fail-safe digital inputs and outputs in one module.
• Supports PROFIsafe communication for functional safety automation.
• Continuous monitoring for cross-circuits and wiring faults.
• Direct control of safety actuators with 2 A fail-safe outputs.
• Electrical isolation between field wiring and system bus.
• Compact DIN rail module for WAGO I/O System 750 installations.

Key Features

• 4 fail-safe digital inputs with clock-sensitive monitoring.
• 4 fail-safe power outputs for safety actuators.
• Supports both bipolar and unipolar switching modes.
• Short-circuit and cross-circuit monitoring.
• Configurable safety parameters using WAGO engineering tools.
• PROFIsafe address configurable via DIP switch or software.
• Status LEDs for channel diagnostics and module status.
• DIN rail mounting for industrial control panels.

Technical Specifications

• Manufacturer: WAGO
• Series: I/O System 750
• Model: 750-667/000-004
• Module type: Fail-safe digital input/output module
• Number of inputs: 4 fail-safe digital inputs
• Number of outputs: 4 fail-safe digital outputs
• Signal voltage: 24 V DC
• Output current: up to 2 A per channel
• Total output current: up to 8 A
• Input current (typ.): approx. 3 mA per channel
• Input frequency (max.): 50 Hz
• Switching frequency: up to 50 Hz (resistive load)
• Safety protocol: PROFIsafe V2.6
• Achievable safety levels: SIL 3 / Category 4 / PL e (dual channel)
• System supply voltage: 5 V DC via system bus
• Field supply voltage: 24 V DC SELV/PELV
• Power consumption (system): approx. 120 mA
• Connection technology: WAGO CAGE CLAMP® terminals
• Mounting: DIN-35 rail
• Dimensions: approx. 24 × 100 × 67.8 mm
• Protection rating: IP20
• Operating temperature: 0 to 55 °C

Integrated Safety Monitoring and Control

Safety automation systems require reliable monitoring of sensors and controlled shutdown of machinery when hazardous conditions are detected. Fail-safe I/O modules serve as the interface between physical safety devices and the safety PLC managing the system.

The WAGO 750-667/000-004 combines safety monitoring and actuator control within a single module, reducing panel space and simplifying safety architecture. Its PROFIsafe communication ensures secure transmission of safety signals across industrial automation networks. :contentReference

Typical Applications

• Emergency stop monitoring and shutdown circuits.
• Safety door and guard monitoring systems.
• Control of safety contactors and actuators.
• Machine safety interlock systems.
• Distributed safety automation networks.

Trusted by Automation Engineers

WAGO safety I/O modules are widely used in machine automation systems to implement reliable functional safety architectures compliant with international safety standards.