The Allen-Bradley 1770-CD serves as the primary physical medium for Data Highway and Remote I/O networks. This high-quality twinaxial cable establishes a stable link between programmable controllers and industrial workstations. It functions as both the central trunkline and the secondary droplines within a networked environment. Because it matches the electrical properties of Belden 9463, it ensures consistent impedance across the entire installation.
Key Technical Specifications
- Part Number: 1770-CD
- Cable Type: Twinaxial (Shielded Twisted Pair)
- Industry Cross-Reference: Equivalent to Belden 9463
- Primary Application: Data Highway Plus (DH+) and Remote I/O (RIO)
- Impedance: 78 Ohms nominal
- Weight: 0.9 kg per standard unit
- Dimensions: 3.5 x 13 x 14.5 cm
- Conductor Material: Tinned Copper
Installation and Noise Suppression
Reliable data transmission depends heavily on proper cable routing and termination. Engineers must install the 1770-CD away from high-voltage lines to prevent electromagnetic interference. The shielding consists of an aluminum foil wrap and a tinned copper braid. This dual-layer protection effectively blocks high-frequency noise from disrupting sensitive data packets. Users must connect the integrated drain wire to a verified earth ground at each station.
Assembly and Connection Procedures
Correct preparation of the cable ends maintains signal integrity throughout the network lifecycle. Technicians should carefully strip the outer jacket without damaging the internal conductors or the shield. The process requires precise attachment to D-shell connectors or terminal blocks depending on the hardware interface. Robust connections minimize signal attenuation and prevent intermittent communication failures in harsh environments. This cable remains a vital component for maintaining industrial uptime and system stability.
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