Wago 750-891 Controler MODBUS/TCP/IP G4

Why Choose the WAGO 750-891 Modbus TCP Controller?

The WAGO 750-891 is a powerful 4th-generation Modbus TCP programmable controller designed for distributed automation systems using the modular WAGO I/O System 750. This DIN-rail PLC integrates high-performance PLC processing with industrial Ethernet networking, enabling reliable control of distributed field devices and modular I/O stations within modern automation architectures. :contentReference

The controller automatically detects connected I/O modules and generates a local process image, allowing digital and analogue modules to be combined seamlessly within the control program. This architecture allows automation engineers to design scalable systems where signals are processed locally while communicating with higher-level control systems via Ethernet networks. :contentReference

Two integrated Ethernet interfaces with an internal switch enable simple line-topology network wiring without additional switches or hubs. With support for IEC 61131-3 programming and standard industrial Ethernet protocols, the controller provides a flexible platform for machine control, process automation and distributed monitoring applications. :contentReference

Key Advantages

• High-performance 4th-generation Modbus TCP PLC controller.
• Dual Ethernet interfaces with integrated switch for line topology networking.
• Automatic detection of connected WAGO I/O modules.
• Supports flexible automation programming using IEC 61131-3.
• Integrated web server for configuration and diagnostics.
• Compatible with the modular WAGO I/O System 750 / 753 Series.

Key Features

• Modbus TCP programmable controller.
• 32-bit CPU with multitasking PLC operation.
• 2 × RJ-45 Ethernet interfaces (10/100 Mbit/s).
• Integrated Ethernet switch supporting line topology wiring.
• Supports Modbus TCP and Modbus UDP communication.
• Integrated web server for diagnostics and configuration.
• DIN-rail mounting for industrial control cabinets.
• Compatible with all WAGO 750 Series I/O modules.

Technical Specifications

• Manufacturer: WAGO
• Series: WAGO I/O System 750
• Model: 750-891
• Product type: Modbus TCP programmable controller
• Controller generation: 4th generation
• Processor: 32-bit CPU
• Program memory: approx. 4 MB
• Data memory: approx. 4 MB
• Non-volatile memory: approx. 32 kB
• Communication protocols: Modbus TCP, Modbus UDP
• Ethernet protocols: HTTP(S), BootP, DHCP, DNS, SNTP, FTP(S), SNMP
• Ethernet interfaces: 2 × RJ-45 (10/100 Mbit/s)
• Supply voltage: 24 V DC (−25% to +30%)
• Maximum I/O modules: up to 250 modules
• Process image: up to 1020 words input / output
• Operating temperature: 0 °C to +55 °C
• Mounting: DIN rail
• Protection rating: IP20

Industrial Modbus Ethernet Connectivity

Modbus TCP is widely used in industrial automation networks to connect PLC controllers, sensors and field devices over Ethernet infrastructure. The WAGO 750-891 controller integrates Ethernet communication with PLC functionality, enabling distributed control architectures where local controllers process signals while communicating with supervisory control systems or SCADA platforms. :contentReference

By combining Ethernet networking with modular I/O expansion through the WAGO I/O System 750, automation engineers can create scalable automation systems suitable for machine control, manufacturing processes and industrial monitoring applications.

Typical Applications

• Industrial machine automation systems.
• Distributed PLC and remote I/O architectures.
• Modbus TCP industrial communication networks.
• Manufacturing process monitoring and control.
• SCADA-connected automation systems.

Trusted by Automation Engineers

WAGO Modbus TCP controllers are widely used in industrial automation systems to deliver reliable distributed control, Ethernet networking and scalable modular I/O integration.