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Wago 750-891 Controler MODBUS/TCP/IP G4
WAGO 750-891 4th generation Modbus TCP programmable controller featuring dual Ethernet ports, 4 MB program memory, 4 MB data memory and modular I/O expansion capabilities for industrial automation systems.
£515.78
Why Choose the WAGO 750-891 Modbus TCP Controller?
The WAGO 750-891 is a versatile 4th generation Modbus TCP programmable controller designed for industrial automation, machine control and distributed I/O applications. As part of the advanced WAGO I/O System 750 series, this controller combines powerful PLC functionality with Ethernet networking and modular I/O integration, providing a scalable solution for modern industrial control systems.
Engineered for reliable operation within Ethernet-based automation networks, the controller supports Modbus TCP and Modbus UDP communications while featuring dual Ethernet interfaces and an integrated switch. This allows efficient line topology networking without requiring additional switches or hubs, simplifying installation and reducing infrastructure costs.
Featuring a powerful 32-bit processor, 4 MB program memory, 4 MB data memory and support for up to 250 I/O modules per node, the WAGO 750-891 provides an ideal platform for machine builders, OEMs and automation engineers seeking reliable and flexible control solutions.
Key Advantages
- Integrated PLC and Modbus TCP controller.
- 4 MB program memory and 4 MB data memory.
- Dual Ethernet interfaces with integrated switch.
- Supports Modbus TCP and Modbus UDP communications.
- Integrated web server for diagnostics and management.
- Supports up to 250 I/O modules per node.
- IEC 61131-3 programming support.
- DIN rail mounting for simple installation.
Key Features
- WAGO I/O System 750 Controller.
- 4th generation programmable controller.
- Modbus TCP and Modbus UDP communication.
- Dual 10/100 Mbit/s Ethernet interfaces.
- 4.096 MB program memory.
- 4.096 MB data memory.
- 32 KB non-volatile memory.
- Integrated web server and web visualisation.
- Capacitor-backed real-time clock.
- 24 V DC operation.
- DIN rail mounting.
- IP20 protection rating.
Efficient Ethernet-Based Automation Control
The WAGO 750-891 automatically detects connected I/O modules and creates a local process image containing both analogue and digital data. This architecture simplifies system configuration while providing fast and reliable data processing for industrial automation applications.
The integrated Ethernet switch enables efficient line topology configurations, eliminating the need for additional networking devices. Combined with support for IEC 61131-3 programming languages, the controller provides a flexible platform for advanced automation projects.
Typical Applications
- Industrial machine automation.
- Process control systems.
- Packaging machinery.
- Material handling equipment.
- Building automation systems.
- Energy monitoring and management.
- Distributed Ethernet I/O networks.
- OEM machinery and control panels.
Technical Specifications
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| Communication | Modbus RTU | |
|---|---|---|
| Device Type | CPU / Controller | |
| Coil / Supply Voltage | 24 V DC | |
| Product Series | WAGO I/O System 750 | |
| Voltage | 24 V | |
| IP Rating | IP20 | |
| Series | I/O System 750 | |
| Product type | Modbus TCP Programmable Controller | |
| Generation | 4th Generation | |
| Processor | 32-bit CPU | |
| Communication protocols | Modbus TCP, Modbus UDP | |
| Ethernet protocols | HTTP(S), BootP, DHCP, DNS, SNTP, SNMP, (S)FTP | |
| Ethernet ports | 2 × RJ45 | |
| Ethernet speed | 10/100 Mbit/s | |
| Program memory | 4.096 MB | |
| Data memory | 4.096 MB | |
| Non-volatile memory | 32 KB | |
| Supply voltage | 24 V DC | |
| Input current | Approx. 500 mA | |
| Maximum I/O modules | 250 per node | |
| Maximum modules without bus extension | 64 | |
| Protection rating | IP20 | |
| Operating temperature | 0°C to +55°C | |
| Mounting type | DIN rail | |
| Dimensions (H × W × D) | approx. 100 × 61.5 × 71.9 mm | |
| Weight | approx. 150 g | |
| HS Code | 85371091 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the WAGO 750-891 used for?
The controller is used for industrial automation applications requiring PLC functionality, Modbus TCP communication and distributed I/O management.
Which communication protocols are supported?
The controller supports Modbus TCP, Modbus UDP and standard Ethernet protocols including HTTP(S), DHCP, DNS, SNMP and FTP.
How much memory does the controller provide?
The WAGO 750-891 features 4.096 MB of program memory, 4.096 MB of data memory and 32 KB of non-volatile memory.
How many Ethernet ports are available?
The controller includes two integrated RJ45 Ethernet ports supporting 10/100 Mbit/s communication with an integrated Ethernet switch.
Can additional I/O modules be connected?
Yes, the controller supports the complete WAGO 750 and 753 Series modular I/O range and can support up to 250 modules per node depending on system configuration.
Trusted by Automation Professionals Worldwide
WAGO 4th generation controllers are widely used throughout industrial automation environments where reliable Ethernet communications, scalable I/O integration and flexible PLC functionality are essential for efficient machine control and long-term operational reliability.
