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Industrial Communication Cable Technical Report
Model: 1756-CP3 ControlLogix Programming Cable
1. Product Overview
The 1756-CP3 is a ControlLogix programming communication cable used to connect PLC controllers with external programming devices such as engineering workstations or terminal equipment. It is primarily designed for RS-232 serial communication in industrial control systems.
This cable is commonly used during commissioning, debugging, configuration, and maintenance of ControlLogix and related PLC systems. It provides a direct point-to-point communication link between the controller and a DTE device.
Unlike network modules, this product is a physical programming interface cable, not a communication processor module.
2. Brand and Series Information
- Brand: Industrial automation control platform
- Series: ControlLogix 1756 Series Accessories
- Product Family: Communication / Programming Cables
- Module Type: RS-232 Programming Cable
The 1756 series includes not only controller and communication modules but also essential accessories such as programming cables used for system configuration and troubleshooting.
3. Product Description
The 1756-CP3 cable is designed with a DB9 connector configuration. One end connects to the PLC controller, while the other connects to a computer or programming device.
It supports RS-232 serial communication and is used for tasks such as:
- PLC configuration
- Firmware access
- Diagnostics and troubleshooting
- Program download and upload
The cable length is typically around 3 meters, allowing flexible installation in industrial environments.
It includes a right-angle connector on the controller side to reduce space constraints inside control cabinets.
4. Technical Parameters
| Parameter | Specification |
|---|---|
| Product Type | Programming / Communication Cable |
| Communication Standard | RS-232 |
| Connector Type | DB9 male to DB9 female |
| Cable Length | 3 m (118 in) |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to 85°C |
| Cable Shielding | Industrial EMI shielding |
| Connector Design | Right-angle + straight connector |
| Application Voltage | Low voltage signal only |
| Weight | ~0.29 kg |
| Dimensions (packaged) | approx. 32 × 15 × 14 cm |
5. Product Applications
The 1756-CP3 cable is widely used in PLC system lifecycle operations:
- PLC programming and configuration
- Industrial system commissioning
- Fault diagnosis and troubleshooting
- Firmware updates and maintenance
- Engineering workstation connection
- ControlLogix system setup
- Legacy system integration tasks
It is especially important during early-stage commissioning and long-term maintenance operations.
6. Product Advantages
- Simple plug-and-play communication setup
- Stable RS-232 serial transmission
- Reliable industrial-grade construction
- Flexible 3-meter installation length
- Right-angle connector saves cabinet space
- Compatible with ControlLogix programming environments
- Strong noise resistance for industrial cabinets
- Low-cost essential maintenance accessory
- Durable for repeated industrial use
- No external power required
7. Same Series / Related Models (ControlLogix Accessories & Communication Family)
| Model | Function | Key Parameters |
|---|---|---|
| 1756-CP3 | RS-232 programming cable | 3 m length, DB9 connectors, ~0.29 kg |
| 1756-CPR2 | ControlNet programming cable | Communication cable for ControlNet setup |
| 1756-CPR3 | Enhanced programming cable | Improved shielding and connector durability |
| 1756-CPR | Basic communication cable | Standard RS-232 configuration cable |
| 1756-ESM | Energy storage module | Supports controller memory backup |
8. Other Popular Models in Same Ecosystem
| Model | Function | Key Parameters |
|---|---|---|
| 1756-L71 | PLC CPU module | High-performance controller, large memory |
| 1756-L72 | Advanced PLC controller | Faster processing capability |
| 1756-EN2TR | EtherNet/IP module | Dual Ethernet redundancy support |
| 1756-IF8 | Analog input module | 8-channel signal acquisition |
| 1756-OB16E | Digital output module | 16-point electronic output control |
9. Engineering Summary
The 1756-CP3 is not a control or communication processor module, but an essential programming accessory used in industrial automation systems. It plays a key role in system commissioning and maintenance by enabling direct serial communication between PLC controllers and engineering devices.
Although simple in structure, it is critical for system setup, troubleshooting, and lifecycle support of ControlLogix-based automation platforms.
Its durability, stable communication characteristics, and compatibility with industrial environments make it a standard tool in PLC engineering workflows.