751-9402 Wago Compact 100 PLC with 2 Analogue/16 Digital Inputs 4 Analogue/8 Digital Outputs

Why Choose the WAGO 751-9402 Compact Controller 100?

The WAGO 751-9402 Compact Controller 100 is an advanced programmable logic controller (PLC) engineered for demanding automation, energy management and Industrial Internet of Things (IIoT) applications. Combining powerful control capabilities with highly flexible onboard I/O, dual Ethernet networking and dual RS-485 communications, it provides a complete automation platform within a compact DIN rail-mounted enclosure.

Unlike traditional compact PLCs, the 751-9402 features 8 dedicated digital inputs, 8 configurable digital input/output channels, 2 analogue inputs, 2 configurable analogue input/output channels and 2 resistance temperature sensor inputs. This flexibility allows engineers to optimise I/O allocation based on application requirements without adding external modules.

Powered by a dual-core ARM Cortex-A7 processor running a real-time Linux operating system, the controller supports CODESYS V3.5, Node-RED, MQTT, OPC UA, EtherCAT and EtherNet/IP, making it ideal for modern automation systems, distributed energy resources and cloud-connected industrial applications.

Key Advantages

• Advanced Compact Controller 100 PLC platform.
• Flexible configurable digital and analogue I/O.
• Dual Ethernet networking interfaces.
• Dual galvanically isolated RS-485 ports.
• Real-time Linux operating system.
• CODESYS V3.5 and Node-RED support.
• MQTT and OPC UA connectivity for IIoT projects.
• Suitable for energy, automation and smart infrastructure applications.

Key Features

• 8 digital inputs.
• 8 configurable digital input/output channels.
• 2 analogue inputs.
• 2 configurable analogue input/output channels.
• 2 resistance temperature sensor inputs.
• 2 × RJ45 Ethernet ports.
• 2 × galvanically isolated RS-485 interfaces.
• MicroSD card slot.
• Dual-core ARM Cortex-A7 processor (650 MHz).
• Real-time Linux operating system.
• CODESYS V3.5 programming environment.
• Node-RED support.
• Integrated web visualisation.
• MQTT, OPC UA and Modbus support.
• DIN rail mounting.

Flexible Control for Energy and Industrial Applications

The WAGO 751-9402 has been specifically developed for applications that require more flexibility than conventional compact PLCs. Its configurable digital and analogue channels allow engineers to tailor I/O allocation to individual projects, reducing hardware complexity and installation costs. The addition of dual isolated RS-485 interfaces makes the controller particularly suitable for energy metering, microgrids and distributed energy systems.

Built on an open Linux platform, the controller supports Docker applications, cloud connectivity, Node-RED workflows and advanced data processing alongside traditional IEC 61131-3 control logic. This enables seamless integration between operational technology and enterprise-level information systems.

Typical Applications

• Distributed energy resource control.
• Microgrid management systems.
• Industrial machine automation.
• Building management systems.
• Water and wastewater applications.
• Remote telemetry and monitoring.
• IIoT gateways and edge computing.
• Energy monitoring and power management.