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- Allen Bradley
- 1756-L61
- ControlLogix ControlNet Communication Module
- USA
- 14.5 × 11.2 × 5.6 cm
- 0.5kg
- Xiamen, China
- New & In Stock
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All our products are priced very favorably because we have our own warehouse and supply.
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1756-L61 Detailed Product Overview
Product Introduction
The 1756-L61 is a ControlLogix programmable automation controller (PAC) designed for industrial automation systems that require reliable high-speed logic execution, modular expansion capability, and multi-network communication support. It is part of the ControlLogix 5561 controller family and is widely used in medium to high-complexity industrial control applications.
This controller functions as the central processing unit (CPU) within a ControlLogix chassis, coordinating I/O modules, communication modules, and executing industrial automation programs such as ladder logic, structured text, and function block diagrams.
The 1756-L61 is commonly used in manufacturing automation, process control systems, material handling equipment, and energy management systems where deterministic real-time performance is required.
It is also widely deployed in legacy and mid-generation ControlLogix systems due to its balance of performance, memory capacity, and system compatibility.
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-L61 belongs to the ControlLogix modular automation platform, designed for scalable and distributed industrial control systems.
This platform is widely used in discrete manufacturing and process industries requiring flexible architecture and real-time control capabilities.
Key system capabilities include:
- PLC logic execution (ladder, structured text, function block)
- Modular I/O system integration
- Multi-network industrial communication
- Deterministic real-time control processing
- Distributed control architecture
- System diagnostics and monitoring
- High scalability and expansion flexibility
- Legacy and mid-generation system compatibility
ControlLogix systems are widely deployed in industrial environments requiring stable long-term operation.
Product Features
1. Enhanced Processing Performance
Provides improved CPU performance compared to earlier ControlLogix models.
2. Large Memory Capacity
Supports larger program and data memory, suitable for complex automation systems.
3. Multi-Protocol Communication
Supports Ethernet/IP, ControlNet, DeviceNet, and serial communication interfaces.
4. Modular System Integration
Works with a wide range of ControlLogix I/O and communication modules.
5. Fast Scan Execution
Provides stable and deterministic scan cycle performance for real-time control.
6. Diagnostic Capabilities
Supports system fault detection and controller status monitoring.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 1756-L61 |
| Product Type | ControlLogix Processor Module |
| Series | ControlLogix 5561 |
| CPU Type | PLC / PAC Controller |
| User Memory | 2.0 MB |
| I/O Capacity | Up to 128,000 I/O points |
| Analog I/O Capacity | 4,000 input / 2,000 output |
| Program Scan Time | ~0.05–0.08 ms |
| Backplane Current (5V DC) | ~1.2 A |
| Backplane Current (24V DC) | ~14 mA |
| Power Dissipation | ~13–15 W |
| Thermal Dissipation | ~7–10 BTU/hr |
| Communication Interfaces | Ethernet/IP, ControlNet, DeviceNet, RS-232 |
| Programming Software | RSLogix 5000 |
| Battery Type | 1756-BA1 / 1756-BATM |
| Redundancy Support | Not supported |
| Isolation Voltage | 30 V continuous |
| Diagnostics | Controller fault indicators |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Humidity Range | 5%–95% non-condensing |
| Vibration Resistance | 10–500 Hz |
| Shock Resistance | 30 g operational |
| Noise Immunity | Industrial EMC protection |
| Mounting Type | Chassis mount |
| Dimensions | 14.5 × 11.2 × 5.6 cm |
| Weight kg（ ） | 0.50 kg |
Product Applications
Industrial Process Automation
Used in chemical, oil, gas, and continuous process industries requiring stable real-time control.
Manufacturing Systems
Applied in assembly lines, robotic systems, and automated production equipment.
Energy and Utility Systems
Used for monitoring and controlling power generation and distribution systems.
Material Handling Systems
Controls conveyors, sorting systems, and warehouse automation equipment.
Packaging Machinery
Used in high-speed synchronized packaging and filling systems.
Legacy Industrial Systems
Widely used in system upgrades and long-term maintenance installations.
Product Advantages
Strong Processing Capability
Handles medium to complex automation tasks with stable performance.
Flexible Communication Support
Supports multiple industrial networks for system integration.
High Reliability
Designed for continuous industrial operation in harsh environments.
Modular Architecture
Easily integrates into ControlLogix chassis-based systems.
Deterministic Control
Ensures consistent scan cycle timing for stable automation behavior.
Long-Term System Support
Widely used in installed systems requiring extended lifecycle maintenance.
Recommended Related Models (Same Series)
| Model | Product Type | Key Feature | System Role | Dimensions | Weight kg（ ） |
|---|---|---|---|---|---|
| 1756-L55 | PLC Controller | Standard CPU model | Main controller | 14.5 × 11.2 × 5.6 cm | 0.35 kg |
| 1756-L55M13 | PLC Controller | Multi-protocol variant | System controller | 20.5 × 15.2 × 7.6 cm | 1.50 kg |
| 1756-L61S | PLC Controller | Safety-enhanced variant | Safety controller | 14.5 × 11.2 × 5.6 cm | 0.55 kg |
| 1756-L63 | PLC Controller | Higher memory CPU | Advanced controller | 14.5 × 11.2 × 5.6 cm | 0.55 kg |
| 1756-L71 | PLC Controller | High-performance CPU | Advanced system controller | 14.5 × 11.2 × 5.6 cm | 0.60 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 between CPU and I/O modules.
Maintain stable temperature and avoid excessive vibration.
Summary
The 1756-L61 is a mid-to-high performance ControlLogix PLC controller designed for industrial automation systems requiring stable logic execution, modular expansion, and multi-network communication capability.
It is widely used in manufacturing, process control, energy systems, and legacy installations where reliable long-term operation and deterministic control performance are essential.