WAGO 750-669/000-003 fail-safe 4-channel digital input and 4-channel relay output module with PROFIsafe communication for safety automation systems.
£616.21
The WAGO 750-669/000-003 is a fail-safe digital input and relay output module designed for safety-critical industrial automation within the WAGO I/O System 750. It provides four fail-safe digital inputs and four fail-safe relay outputs, allowing safety sensors and safety actuators to be integrated directly into PLC-based automation systems using the PROFIsafe safety protocol.
This module is particularly suited for applications requiring electrically isolated relay outputs capable of switching higher loads or mixed AC/DC voltages. The relay outputs can switch loads up to 48 VAC or 60 VDC with up to 6 A per channel, enabling direct control of safety contactors, valves and shutdown circuits. :contentReference
Each of the four digital inputs is clock-sensitive and monitored via dedicated test pulses. This ensures continuous detection of wiring faults such as short circuits, cross-circuits or unintended voltage supply conditions, providing reliable functional safety monitoring in demanding industrial environments. :contentReference
Safety automation systems require reliable monitoring of safety sensors and safe switching of actuators such as contactors or shutdown circuits. Relay-based safety outputs are particularly useful when switching higher loads or mixed voltage types.
The WAGO 750-669/000-003 combines fail-safe digital inputs with isolated relay outputs, enabling engineers to monitor safety signals while directly controlling high-power safety devices. This integrated design simplifies machine safety architecture while maintaining compliance with international safety standards. :contentReference
| IP Rating | IP20 |
|---|---|
| Series | I/O System 750 |
| Module type | Fail-safe digital input and relay output module |
| Number of inputs | 4 fail-safe digital inputs |
| Number of outputs | 4 fail-safe relay outputs |
| Output type | Electrically isolated relay |
| Load voltage | 5…60 V DC / 5…48 V AC |
| Output current | up to 6 A per channel |
| Total switching current | up to 24 A |
| Input current (typ.) | approx. 2.2 mA |
| Maximum input frequency | 50 Hz |
| Safety protocol | PROFIsafe (V1 and V2) |
| Safety classification | up to SIL 3 / Category 4 / PL e |
| System supply voltage | 5 V DC via system bus |
| Field supply voltage | 24 V DC |
| Connection technology | WAGO Push-in CAGE CLAMP® terminals |
| Mounting | DIN-35 rail |
| Operating temperature | 0 to 55 °C |
| Dimensions | approx. 48 mm width |
| Protection rating | IP20 |
| HS Code | 85389099 |
| Country of Manufacture | Germany |
The module integrates fail-safe digital inputs and relay outputs into PROFIsafe automation systems, allowing safety sensors and actuators to be monitored and controlled.
The module includes four fail-safe digital inputs and four fail-safe relay outputs. :contentReference
The relay outputs can switch loads up to 48 VAC or 60 VDC with up to 6 A per channel. :contentReference
The module supports functional safety classifications up to SIL 3 / Category 4 / Performance Level e depending on system architecture. :contentReference
The module integrates with WAGO I/O System 750 fieldbus couplers and safety controllers using PROFIsafe communication.
WAGO safety I/O modules are widely used in machine automation systems to implement reliable functional safety architectures compliant with international industrial safety standards.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...