Allen-Bradley 1756-CP3 Serial Programming Cable

Availability: 9 left in stock

DescriptionThe Allen-Bradley 1756-CP3 is a dedicated serial programming cable designed for the ControlLogix and SLC 500 controller families. It serves...

SKU: 1756-CP3

Manufacturer: Allen-Bradley
Product No.: 1756-CP3
Product Type: Programming Cable
Product Origin: USA
Payment:T/T, Western Union
Weight: 110g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Description

The Allen-Bradley 1756-CP3 is a dedicated serial programming cable designed for the ControlLogix and SLC 500 controller families. It serves as the physical communication link between a controller's front-facing RS-232 port and a computer or other Data Terminal Equipment (DTE). This cable is essential for local programming, firmware updates, and troubleshooting when network-based communication, such as Ethernet or ControlNet, is unavailable or not yet configured.

Features

Right-Angle Connector: Features a right-angle 9-pin female D-shell connector at the controller end, allowing for chassis door closure during operation.
Null-Modem Configuration: Engineered for point-to-point serial communication, bridging transmit and receive pins between the PLC and PC.
Compatibility: Designed for use with Logix 5550, 5560, and 5570 controllers, as well as SLC 5/03, 5/04, and 5/05 modular processors.
Standard Interface: Compatible with standard PC COM ports or high-quality USB-to-Serial adapters.

Technical Specifications

Brand	Allen-Bradley
Product Line	ControlLogix / SLC 500
Cable Type	Serial RS-232 Programmer Cable
Length	10 feet (3 meters)
Connector A	9-pin D-shell (Right-Angle Female)
Connector B	9-pin D-shell (Straight Female)
Protocol	DF1 (RS-232)

Installation Guidelines

Ensure the controller is powered or in a safe state before connecting or disconnecting the cable to prevent potential communication errors.
The right-angle connector should be seated fully into the controller's front-facing port to ensure a secure connection.
Avoid routing the cable near high-voltage power lines or heavy electromagnetic interference (EMI) sources to maintain signal integrity during data transfer.
If using a USB-to-Serial converter, ensure the driver is correctly mapped to the COM port in your programming software (e.g., RSLinx).

FAQ

Is this cable compatible with USB ports?

The 1756-CP3 features a 9-pin serial connector. To use it with a modern computer lacking a native COM port, you must use a high-quality USB-to-Serial converter. Ensure the converter supports the DF1 protocol.

Can I keep this cable connected while the ControlLogix chassis door is closed?

Yes. The 1756-CP3 is specifically designed with a right-angle connector at the controller end to provide the necessary clearance for the chassis door to close while the cable is attached.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.