Wago 750-557 4Ao, ±10 Vdc

Why Choose the WAGO 750-557 Relay Output Module?

The WAGO 750-557 is a dependable 4-channel relay output module designed for use with the WAGO I/O System 750 and 753 distributed automation platform. It enables PLCs and fieldbus controllers to switch AC or DC loads using mechanical relay contacts, providing a reliable interface between low-voltage control signals and external electrical circuits.

Each output channel provides a potential-free relay contact, allowing the module to safely control devices such as contactors, solenoid valves, pumps, motors, alarms and signalling equipment. This flexibility makes the module suitable for industrial automation, machine control and building management applications where reliable load switching is required.

The module’s compact DIN rail design enables efficient installation within control cabinets and distributed I/O stations. WAGO’s proven CAGE CLAMP® spring pressure connection technology allows quick wiring, vibration-resistant connections and maintenance-free operation, ensuring long-term reliability in demanding industrial environments.

Key Advantages

• 4 relay output channels for switching multiple loads.
• Potential-free relay contacts suitable for AC and DC circuits.
• Provides galvanic isolation between PLC control signals and field circuits.
• Compact DIN rail module for efficient control cabinet layouts.
• CAGE CLAMP® spring pressure terminals for fast and secure wiring.
• Fully compatible with the WAGO I/O System 750 and 753.

Key Features

• 4-channel relay output module.
• Potential-free relay contacts.
• Mechanical relay switching for AC and DC loads.
• Electrical isolation between system and field circuits.
• DIN rail mounting for industrial control cabinets.
• CAGE CLAMP® spring connection technology.
• Part of the WAGO distributed I/O architecture.
• Designed for industrial automation and building control systems.

Technical Specifications

• Manufacturer: WAGO
• Series: WAGO I/O System 750 / 753
• Model: 750-557
• Module type: Relay output module
• Number of outputs: 4 relay outputs
• Contact type: Potential-free relay contacts
• Maximum switching voltage: approx. 250 V AC / 30 V DC
• Maximum switching current: approx. 2 A per channel
• Switching type: Mechanical relay
• System supply voltage: 5 V DC via internal system bus
• Connection technology: CAGE CLAMP® spring connection
• Mounting type: 35 mm DIN rail
• Dimensions: approx. 100 × 24 × 67.8 mm
• Operating temperature: -20 °C to +60 °C
• Protection rating: IP20
• Isolation: galvanic isolation between system and field circuits
• Approvals: CE, UL and international industrial approvals

Reliable Distributed Automation with WAGO I/O

The WAGO I/O System 750/753 is widely used in distributed automation architectures for machine control, factory automation and building management systems. The modular design allows digital, analogue and communication modules to be combined to create scalable industrial automation solutions.

Relay output modules such as the 750-557 are particularly useful when higher voltage loads must be switched or when electrical isolation between PLC logic and field circuits is required. Mechanical relay contacts provide a reliable interface for controlling external equipment from automation systems.

Typical Applications

• Industrial automation control panels.
• PLC-controlled relay switching.
• Machine control and process automation.
• Switching AC loads and higher voltage circuits.
• Alarm and signalling systems.
• Building automation and facility management.

Trusted by Automation Engineers

WAGO relay output modules are trusted worldwide by machine builders and automation engineers for reliable switching performance, electrical isolation and flexible integration in industrial control systems.