Description

The Allen-Bradley 1770-CD serves as the primary physical medium for legacy industrial networks. It supports both Data Highway (DH) and Data Highway Plus (DH+) protocols. This high-quality twinaxial cable is functionally identical to Belden 9463. It provides a stable path for data exchange between programmable logic controllers. Consequently, the cable functions as both the network trunkline and the specific station droplines.

Design and Construction

Engineers designed this cable to withstand harsh industrial environments. The twinaxial architecture features two insulated conductors twisted together. A conductive braid and foil shield surround these internal wires. This layered shielding effectively blocks electromagnetic interference (EMI). Therefore, the 1770-CD maintains signal integrity over long distances on the factory floor. The blue outer jacket identifies it as standard industrial communication media.

Installation and Shielding Protocols

Reliable network performance requires strict adherence to grounding standards. Installers must connect the shield drain wire to an earth ground. This practice safely channels away electrical noise. Proper termination into D-shell connectors or terminal blocks is also necessary. Furthermore, avoid routing this cable near high-voltage power lines. This separation prevents signal degradation and ensures maximum system uptime.

Technical Specifications

Application Use Cases

This cable is essential for connecting PLC-5 and SLC 500 controllers. It facilitates communication between processors and remote I/O chassis. Additionally, it supports connections to industrial operator interfaces. The 1770-CD ensures a low-latency connection for critical control data. Many facilities use it to maintain reliable legacy automation architectures.