Allen-Bradley 1747-C20 SLC 500 Programming Cable 6m

1747-C20 Allen‑Bradley DH‑485 Programming Cable

Product Introduction

The 1747-C20 cable from Allen‑Bradley provides a reliable programming and communication link for SLC 500 controller systems. This 6.09‑meter (20‑foot) cable offers extended reach compared to shorter alternatives. It enables flexible connections between your programming terminal and various supporting devices across the automation network.

This cable supports the DH‑485 communication protocol, which ensures efficient data exchange in industrial environments. Additionally, the 1747-C20 works seamlessly with multiple compatible accessories, including isolated link couplers and personal interface converters. Its clip‑on connector design guarantees secure attachment, reducing the risk of accidental disconnection during operation.

Technical Specifications

The 1747-C20 cable incorporates several technical features that enhance its reliability and performance. Its electrical isolation capability protects connected equipment from voltage spikes and ground loops.

Key technical attributes include:

• Manufacturer: Allen‑Bradley

• Series: SLC 500

• Supported Controllers: SLC 500 controllers

• Cable Length: 6.09 meters (20 feet)

• Communication Protocol: DH‑485

• Isolation Voltage: 1500V DC

• Connector Type: Clip‑on

• EMI Protection: Yes

• Compatible Accessories:

  • 1747-AIC Isolated Link Coupler

  • 1747-PIC Personal Interface Converter

  • 1747-DTAM-E Data Table Access Module

Furthermore, the cable's EMI shielding minimizes electromagnetic interference, which is common in factory environments with heavy machinery. Therefore, the 1747-C20 maintains signal integrity even in electrically noisy settings.

Mechanical and Environmental Ratings

The 1747-C20 cable is built to withstand typical industrial conditions. Its rugged construction ensures long‑term durability in daily use.

Physical Characteristics:

• Length: 6.09 meters (provides ample reach for panel‑to‑workstation connections)

• Connector Type: Clip‑on (offers secure, tool‑free attachment)

• Weight: Approximately 0.45 kg (lightweight for easy handling)

Electrical Protection:

• Isolation Voltage: 1500V DC (protects against electrical faults)

• EMI Protection: Built‑in shielding (reduces signal degradation)

Although specific temperature ratings are not published, this cable operates reliably within standard industrial temperature ranges. Its insulation materials resist wear from repeated flexing and movement.

Installation and Usage Guidelines

Installing the 1747-C20 cable requires minimal effort, but proper handling extends its service life. First, identify the correct ports on your SLC 500 controller and the target device. Then, attach the clip‑on connectors firmly until they click into place.

For programming applications, connect one end to your computer via a compatible interface converter like the 1747-PIC. Next, connect the other end to the controller or link coupler. The extended 6.09‑meter length gives you flexibility in positioning your programming workstation.

For network connections, pair the 1747-C20 with the 1747-AIC isolated link coupler. This combination creates a robust DH‑485 communication link. Meanwhile, the 1747-DTAM-E module allows operator access to data tables through the same cable. Always avoid sharp bends or pinching the cable to maintain optimal performance.

Packaging and Shipping

Your order for the 1747-C20 cable includes the following items in the package:

• One Allen‑Bradley 1747-C20 programming/communication cable (6.09 meters)

• Anti‑static protective packaging

We ship all orders through trusted global logistics partners to ensure safe and timely delivery. Specifically, our shipping carriers include:

• FedEx

• UPS

• DHL

Please be aware that the package does not include installation software, user manuals, or mounting accessories. Additionally, certificates of conformity and warranty documents are not included with this listing. For bulk orders or special shipping requests, please contact our sales team directly.

Frequently Asked Questions (FAQ)

Q1: Can the 1747-C20 connect directly to a PC's USB port?
A1: No, this cable uses DH‑485 protocol. You need a 1747-PIC converter or a USB‑to‑DH485 adapter for PC connections.

Q2: Is the 1747-C20 compatible with ControlLogix or CompactLogix systems?
A2: No, this cable is specifically designed for SLC 500 controllers. It does not support Logix‑family platforms.

Q3: What is the purpose of the 1500V isolation voltage?
A3: This isolation protects your controller and programming device from voltage surges and ground loops, enhancing system safety.

Q4: Can I use this cable with the 1747-AIC coupler for network extension?
A4: Yes, the 1747-C20 works perfectly with the 1747-AIC to extend DH‑485 network connections.

Q5: How do I maintain this cable for long‑term use?
A5: Avoid excessive bending, keep connectors clean, and store it in a dry environment when not in use. Regular inspection prevents wear‑related issues.