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- Allen Bradley
- 1756-L55M23
- ControlLogix ControlNet Communication Module
- USA
- 8.9 × 8.9 × 3.2 cm
- 0.35kg
- Xiamen, China
- New & In Stock
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1756-L55M23 Detailed Product Overview
Product Introduction
The 1756-L55M23 is a ControlLogix programmable automation controller (PAC) designed for industrial automation systems requiring stable high-speed logic execution, distributed control architecture, and multi-network communication capability. It belongs to the ControlLogix 5555 controller family and is widely used in medium to complex industrial control environments.
This controller functions as the central processing unit (CPU) inside a ControlLogix chassis, coordinating I/O modules, communication modules, and executing automation programs such as ladder logic, structured text, and function block diagrams.
The 1756-L55M23 is commonly deployed in manufacturing automation, process control systems, energy facilities, and material handling systems where deterministic real-time performance and high reliability are required.
It is also widely used in legacy industrial installations that require long-term maintenance support and spare part replacement.
Brand Information
| Item | Details |
|---|---|
| Brand | Allen Bradley |
| Product Category | PLC Controller Module |
| Product Type | ControlLogix Processor (CPU) |
| Platform | ControlLogix |
| Installation Method | Chassis Mounted |
| Main Function | Industrial Control & Logic Execution |
| Application Field | Industrial Automation Systems |
| System Role | Central Processing Unit (CPU) |
Product Series Overview
ControlLogix Series
The 1756-L55M23 belongs to the ControlLogix modular automation platform designed for scalable and distributed industrial control systems.
This platform is widely used in both discrete manufacturing and continuous process industries where reliable system coordination and real-time control are required.
Key system capabilities include:
- PLC logic execution (ladder, structured text, function block)
- Modular I/O system integration
- Multi-network communication support
- Deterministic real-time control processing
- Distributed automation architecture
- System diagnostics and fault detection
- Industrial network integration
- Legacy system compatibility
ControlLogix systems are widely deployed in industrial plants requiring continuous operation and high stability.
Product Features
1. High-Performance CPU Architecture
Provides stable execution of complex industrial automation programs with deterministic timing.
2. Dual Memory System
Includes both RAM and non-volatile memory for program backup and fast execution.
3. Multi-Network Communication
Supports Ethernet/IP, ControlNet, DeviceNet, and serial communication interfaces.
4. Modular Expansion Capability
Compatible with a wide range of ControlLogix I/O and communication modules.
5. Fast Scan Performance
Provides fast program execution with very low scan cycle time.
6. Built-in Diagnostics
Offers system fault detection, controller status monitoring, and maintenance support.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 1756-L55M23 |
| Product Type | ControlLogix Processor Module |
| Series | ControlLogix 5555 |
| CPU Type | PLC / PAC Controller |
| RAM Memory | 1.5 MB |
| Non-Volatile Memory | 1.5 MB |
| I/O Capacity | Up to 128,000 I/O points |
| Analog I/O Capacity | 4,000 input / 2,000 output |
| Program Scan Time | ~0.08 ms |
| Backplane Current (5V DC) | 1.23 A |
| Backplane Current (24V DC) | 14 mA |
| Power Dissipation | ~13 W |
| Thermal Dissipation | ~7–8 BTU/hr |
| Communication Interfaces | Ethernet/IP, ControlNet, DeviceNet, RS-232 |
| Programming Software | RSLogix 5000 |
| Battery | 1756-BA1 / 1756-BATM |
| Redundancy Support | Not supported |
| Vibration Resistance | 10–500 Hz |
| Humidity Range | 5%–95% non-condensing |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Noise Immunity | Industrial EMC protection |
| Diagnostic Features | Controller fault indicators |
| Mounting Type | Chassis mount |
| Dimensions | 8.9 × 8.9 × 3.2 cm |
| Weight kg（ ） | 0.35 kg |
Product Applications
Industrial Process Automation
Used in chemical, oil, gas, and continuous process industries requiring stable control logic execution.
Manufacturing Systems
Applied in assembly lines, robotic cells, and automated production equipment.
Energy and Utility Systems
Used in monitoring and controlling generation and distribution systems.
Material Handling Systems
Controls conveyors, sorting machines, and warehouse automation systems.
Packaging Machinery
Used in high-speed synchronized packaging and filling equipment.
Legacy Industrial Installations
Widely used for long-term maintenance and system replacement in installed ControlLogix systems.
Product Advantages
Stable Processing Performance
Ensures reliable execution of industrial automation programs.
Multi-Network Integration
Supports multiple industrial communication protocols for flexible system design.
High Industrial Reliability
Designed for continuous 24/7 operation in harsh environments.
Modular System Compatibility
Works seamlessly with ControlLogix I/O and communication modules.
Fast Real-Time Control
Low scan time ensures responsive system behavior.
Long Lifecycle Support
Commonly used in legacy systems requiring extended service life.
Recommended Related Models (Same Series)
| Model | Product Type | Key Feature | System Role | Dimensions | Weight kg（ ） |
|---|---|---|---|---|---|
| 1756-L55 | PLC Controller | Standard ControlLogix CPU | Main controller | 14.5 × 11.2 × 5.6 cm | 0.35 kg |
| 1756-L55M12 | PLC Controller | Memory variant CPU | Control processor | 14.5 × 11.2 × 5.6 cm | 0.36 kg |
| 1756-L55M13 | PLC Controller | Multi-protocol CPU | System controller | 20.5 × 15.2 × 7.6 cm | 1.50 kg |
| 1756-L61 | PLC Controller | Enhanced processing CPU | Advanced controller | 14.5 × 11.2 × 5.6 cm | 0.50 kg |
| 1756-L63 | PLC Controller | Higher memory CPU | High-capacity controller | 14.5 × 11.2 × 5.6 cm | 0.55 kg |
Popular Models from Same Brand
| Model | Product Type | Function | Communication | Dimensions | Weight kg（ ） |
|---|---|---|---|---|---|
| 1756-EN2TR | Ethernet Module | Industrial networking | EtherNet/IP | 14.5 × 11.2 × 5.6 cm | 0.50 kg |
| 1756-IF8 | Analog Input Module | Signal acquisition | Backplane | 14.5 × 11.2 × 5.6 cm | 0.42 kg |
| 1756-IV32 | Digital Input Module | High-density inputs | Backplane | 30.0 × 3.8 × 11.1 cm | 1.00 kg |
| 2711P-T10C4D8 | HMI Panel | Operator interface | Ethernet/USB | 27.1 × 21.1 × 6.0 cm | 1.80 kg |
| 25B-D017N104 | VFD Drive | Motor control | EtherNet/IP | 35.0 × 21.6 × 18.0 cm | 4.90 kg |
Installation Notes
Install the controller in a properly grounded ControlLogix chassis.
Ensure firmware compatibility across all modules in the system.
Maintain proper cabinet cooling and avoid vibration for long-term stability.
Summary
The 1756-L55M23 is a high-performance ControlLogix PLC processor designed for industrial automation systems requiring stable logic execution, multi-network communication, and modular architecture integration.
It is widely used in manufacturing, process control, energy systems, and legacy installations where long-term operational stability and deterministic control performance are essential.