Product Introduction

The Allen Bradley 1747-CP3 Programmer Cable is an RS-232 serial communication accessory for programming and maintaining compatible SLC 500 programmable logic controllers. It provides the connection between a computer and the controller's serial communication port, allowing technicians to access PLC applications through supported programming software.

The cable is particularly relevant to SLC 5/03, SLC 5/04, and SLC 5/05 installations that use Channel 0 for serial communication. With a length of 10 feet (3.05 meters), it offers practical flexibility for programming and troubleshooting work around industrial control cabinets.

When used with RSLogix 500 and a compatible computer interface, the 1747-CP3 supports common PLC maintenance activities, including program upload and download, online monitoring, controller configuration, and fault diagnosis.

For modern computers without a built-in serial port, an appropriate USB-to-RS-232 adapter may be necessary. Before installation, verify the controller model, Channel 0 settings, and computer communication interface to ensure reliable connectivity.

Technical Specifications

Parameter	Specification
Brand	Allen Bradley
Model	1747-CP3
Product Series	SLC 500
Product Type	Programmer Cable
Communication Interface	RS-232
Cable Length	10 ft (3.05 m)
Compatible Controllers	SLC 5/03, SLC 5/04, SLC 5/05
Controller Communication Port	Channel 0
Programming Software	RSLogix 500
Primary Functions	PLC programming, data transfer, monitoring, diagnostics
Shipping Weight	3 kg / 6.61 lb

Recommended Related Models

The following Allen Bradley products are relevant to SLC 500 programming and communication applications:

Model	Product Description
1747-L531	SLC 5/03 Programmable Controller
1747-L532	SLC 5/03 Programmable Controller
1747-L541	SLC 5/04 Programmable Controller
1747-L542	SLC 5/04 Programmable Controller
1747-L551	SLC 5/05 Programmable Controller
1747-L552	SLC 5/05 Programmable Controller
1747-C10	SLC 500 Programming/Communication Cable
1747-C20	SLC 500 Programming/Communication Cable

These products are associated with the SLC 500 platform, but their communication interfaces and connection requirements differ. Confirm the exact processor model before selecting a cable.

Popular Related Models

Other Allen Bradley product families and components commonly associated with PLC programming and maintenance include:

1747 Series: SLC 500 processors, programming accessories, and communication components.
1746 Series: Digital and analog I/O modules for SLC 500 control systems.
1784 Series: Allen Bradley programming and communication interface products.
1761 Series: MicroLogix communication cables and interface accessories.

When sourcing the 1747-CP3, verify the complete catalog number, connector condition, and RS-232 compatibility with the intended controller and programming computer.

Applications

The Allen Bradley 1747-CP3 Programmer Cable is an RS-232 communication cable designed for programming and data communication with compatible Allen Bradley SLC 500 programmable logic controllers. It connects the controller's serial communication port to a computer or other supported programming device.

Typical applications include:

PLC Program Upload and Download: Establishes a serial connection for transferring programs between a computer and a compatible SLC 500 processor.
Controller Configuration: Supports access to PLC parameters and communication settings through compatible programming software.
Online Monitoring: Allows technicians to monitor controller status, inspect data files, and troubleshoot application logic.
PLC Commissioning: Provides a communication connection during installation, configuration, and system testing.
Equipment Maintenance: Supports servicing and diagnostics of existing SLC 500 automation systems.

Key Features and Advantages

RS-232 Serial Communication: Provides a serial communication connection for compatible SLC 500 processor programming ports.

SLC 500 Compatibility: Designed for programming applications involving supported SLC 500 processors equipped with an RS-232 communication interface.

10-Foot Cable Length: Offers approximately 3.05 meters of connection distance, providing flexibility when positioning a programming computer near a control cabinet.

Programming Software Support: Works with compatible Allen Bradley programming environments, including RSLogix 500, when used with an appropriate computer interface.

Convenient Maintenance Access: Helps technicians upload, download, monitor, and troubleshoot PLC applications without changing the controller's installed communication architecture.

Technical FAQs

Q1: What is the primary function of the 1747-CP3?

A: It provides an RS-232 serial connection between a computer and a compatible Allen Bradley SLC 500 controller for programming and communication.

Q2: Which SLC 500 processors support the 1747-CP3?

A: It is commonly used with SLC 5/03, SLC 5/04, and SLC 5/05 processors through their Channel 0 serial communication ports.

Q3: What is the cable length?

A: The specified cable length is 10 feet, approximately 3.05 meters.

Q4: Can the 1747-CP3 be used with RSLogix 500?

A: Yes. It supports serial communication for compatible SLC 500 programming operations using RSLogix 500.

Q5: Can the cable be used for uploading and downloading PLC programs?

A: Yes. When the computer, software, and controller communication settings are configured correctly, it supports program transfer operations.

Q6: Does the 1747-CP3 use an Ethernet connection?

A: No. It is an RS-232 serial communication cable, not an Ethernet cable.

Q7: Can the 1747-CP3 connect to a modern computer without a serial port?

A: A compatible USB-to-RS-232 adapter may be required. The adapter's driver and serial port configuration must also be supported by the programming software.

Q8: What is the difference between the 1747-CP3 and 1747-C20?

A: The 1747-CP3 is an RS-232 programming cable, while the 1747-C20 is used in a different SLC 500 processor-to-peripheral communication arrangement. They are not interchangeable.

Q9: What should be checked if the PLC cannot communicate with the computer?

A: Inspect the cable connectors, verify the selected computer serial port, check the controller's Channel 0 configuration, and confirm that the programming software uses compatible communication settings.

Q10: Can a standard serial cable replace the 1747-CP3?

A: Not automatically. The replacement must match the required connector arrangement, wiring configuration, and electrical communication characteristics.

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