Wago 750-451 8Ai, Rtd

Why Choose the WAGO 750-451 8-Channel RTD Analog Input Module?

The WAGO 750-451 is a precision 8-channel RTD analog input module designed for the WAGO I/O System 750. It allows PLCs and industrial controllers to measure temperature and resistance values from platinum and nickel resistance sensors, delivering accurate process monitoring for industrial automation systems.

The module directly connects to RTD sensors such as Pt100, Pt200, Pt500, Pt1000, Ni100 and Ni120, converting resistance measurements into temperature values through integrated linearisation. This enables precise temperature monitoring across manufacturing, process control and building automation applications. :contentReference

Each of the eight input channels delivers high-resolution measurement data and can be individually configured through WAGO-I/O-CHECK or controller software. With its compact DIN rail housing and robust CAGE CLAMP® connection technology, the module provides reliable installation within distributed industrial control cabinets.

Key Advantages

• High-density 8-channel RTD analog input module.
• Supports multiple Pt and Ni resistance temperature sensors.
• Automatic temperature linearisation for accurate measurements.
• High measurement accuracy with configurable settings.
• LED diagnostics indicate sensor faults such as wire breaks or short circuits.
• Compact DIN rail design for modular distributed automation systems.

Key Features

• 8 analog input channels.
• Resistance and RTD temperature measurement.
• Compatible with Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120 and Ni1000.
• 2-wire sensor connections.
• 16-bit process data resolution.
• Automatic temperature linearisation.
• LED indicators for channel status and diagnostics.
• DIN rail mounted modular design.

Technical Specifications

• Manufacturer: WAGO
• Series: WAGO I/O System 750
• Model: 750-451
• Module type: RTD analog input module
• Number of inputs: 8 channels
• Signal type: Resistance / RTD temperature measurement
• Supported sensors: Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000
• Resolution: up to 0.01 °C (sensor dependent)
• Conversion time: approx. 100 ms
• Measurement error (25 °C): ≤ ±0.6 K typical
• Measuring current: approx. 350 µA
• Data width: 16-bit per channel
• System supply voltage: 5 V DC via system bus
• Field supply voltage: 24 V DC via power jumper contacts
• Isolation: approx. 500 V between system and field levels
• Connection technology: CAGE CLAMP® spring terminals
• Mounting: 35 mm DIN rail
• Module width: approx. 12 mm
• Protection rating: IP20
• Operating temperature: approx. 0 °C to +55 °C

Industrial Temperature Measurement

RTD sensors provide highly stable and accurate temperature measurement for industrial processes. Automation systems rely on RTD input modules to convert resistance values into digital temperature data that PLCs can process for monitoring, alarms and closed-loop control.

The WAGO 750-451 integrates these measurement capabilities into the modular 750 I/O platform, enabling scalable distributed automation systems with precise temperature monitoring across industrial production and process control environments. :contentReference

Typical Applications

• Industrial temperature monitoring systems.
• Process automation and instrumentation.
• HVAC and building automation.
• Manufacturing process monitoring.
• Energy and utility infrastructure.

Trusted by Automation Engineers

WAGO I/O System 750 modules are widely used by machine builders and automation engineers to implement reliable distributed control systems across industrial and process automation environments.