Wago 750-662/000-004 8FDI

Why Choose the WAGO 750-662/000-004 PROFIsafe Digital Input Module?

The WAGO 750-662/000-004 is a fail-safe 8-channel digital input module designed for integration within the WAGO I/O System 750. It allows safety-critical devices such as emergency stop buttons, safety door switches, operating mode selectors and safety sensors to be connected directly to PLC-based automation systems using the PROFIsafe communication protocol.

Each of the eight inputs is a clock-sensitive safety input supplied by two test pulse outputs, allowing the module to continuously monitor wiring integrity and detect faults such as cross-circuits or external voltage interference. This architecture enables reliable machine safety monitoring in demanding industrial automation environments. :contentReference

The module is designed for functional safety systems requiring high safety classifications. When configured in dual-channel mode it supports safety levels up to SIL 3 / Category 4 / PL e, while single-channel configurations can achieve SIL 2 / Category 2. :contentReference

Key Advantages

• Fail-safe 8-channel digital input module for safety-critical automation.
• Supports PROFIsafe communication for safety PLC integration.
• Continuous monitoring for cross-circuits and wiring faults.
• Suitable for emergency stop circuits and safety interlocks.
• Galvanic isolation between field wiring and system electronics.
• Compact DIN rail module for WAGO I/O System 750 installations.

Key Features

• 8 fail-safe digital inputs with test pulse monitoring.
• Two clock outputs (T1 and T2) for safety signal verification.
• Continuous detection of cross-circuits and external voltage supply.
• Configurable safety parameters via WAGO engineering tools.
• PROFIsafe address configurable via DIP switch or software.
• Status LEDs for channel diagnostics and error indication.
• Compatible with PROFIsafe V2.4 and V2.6 implementations.
• DIN rail mounting for modular automation control cabinets.

Technical Specifications

• Manufacturer: WAGO
• Series: I/O System 750
• Model: 750-662/000-004
• Module type: Fail-safe digital input module
• Number of inputs: 8 digital inputs
• Safety protocol: PROFIsafe
• Input type: Clock-sensitive fail-safe inputs
• Test pulse outputs: 2 (T1, T2)
• Input current (typ.): approx. 3 mA
• Maximum input frequency: 50 Hz
• Field supply voltage: 24 V DC (SELV/PELV)
• System supply voltage: 5 V DC via internal system bus
• Power consumption: approx. 120 mA (system supply)
• Connection technology: WAGO CAGE CLAMP® spring terminals
• Mounting: DIN-35 rail
• Dimensions (W × H × D): approx. 24 × 100 × 67.8 mm
• Protection rating: IP20
• Operating temperature: 0 to 55 °C

Industrial Functional Safety Integration

Functional safety systems are critical for protecting personnel and machinery within automated environments. Safety-rated I/O modules monitor signals from emergency stop circuits, safety doors and machine interlocks to ensure equipment operates only under safe conditions.

The WAGO 750-662/000-004 allows safety sensors and switches to be integrated into distributed control architectures using the WAGO I/O System 750 platform. By combining PROFIsafe communication with fail-safe digital inputs, engineers can implement standards-compliant safety architectures within machine and process automation systems. :contentReference

Typical Applications

• Emergency stop circuits in industrial machinery.
• Safety door and guard monitoring systems.
• Machine safety interlocks and protective circuits.
• Industrial robotics safety systems.
• Distributed safety monitoring networks.

Trusted by Automation Engineers

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