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Product Overview
The Allen‑Bradley 1784‑CP7 is the standard factory‑specified programming and network connection cable used to interface a personal computer or programming workstation—equipped with an Allen‑Bradley 1784‑PKTX(D) PCI DH+ interface card, a 1770‑KF2 interface module, or a 1747‑KF2 message display—to an Allen‑Bradley Data Highway Plus (DH+) network or a Remote I/O (RIO) communication link. Manufactured by Rockwell Automation as a shielded, blue‑jacketed Belden cable assembly, the 1784‑CP7 is 3 meters (approximately 9.8 feet) in length and terminates at one end in a 15‑pin male D‑subminiature connector (for the 1784‑PKTX card or KF series interface) and at the other end in a 5‑pin male mini‑round (mini‑receptacle) connector that plugs directly into a DH+ or RIO network tap, processor communication port (such as on a PLC‑5 1785‑Lx or SLC 5/04 with Channel 1 configured for DH+), or a 1771‑ASB adapter’s DH+ port.In legacy Allen‑Bradley automation architectures—particularly those built around the PLC‑5, SLC 500, and early ControlLogix bridging configurations—the Allen‑Bradley 1784‑CP7 serves two primary roles: first, as the physical link between an engineering laptop/desktop (via the 1784‑PKTX PCI card) and the DH+ network for uploading, downloading, and monitoring control programs with RSLogix 5 or RSLogix 500; second, as a short DH+ or RIO drop cable connecting a 1784‑PKTX‑equipped PC to a DH+ trunk line via a tapped resistor network or splice block. The cable’s overall braided shield is tied to the D‑shell connector’s metal housing and should be grounded at the PC/interface end only, preserving signal integrity on the DH+ differential signaling pair in electrically noisy industrial environments.Because DH+ and RIO networks remain operational in many process plants, power‑generation facilities, and heavy‑manufacturing lines worldwide, the Allen‑Bradley 1784‑CP7 continues to be an essential consumable item for maintenance teams and system integrators who require reliable physical access to these legacy control networks for configuration, troubleshooting, and data collection.
Technical Specifications
| Product Model | 1784-CP7 |
|---|---|
| Manufacturer | Rockwell Automation / Allen‑Bradley |
| Product Type | DH+ (Data Highway Plus) & Remote I/O Programming / Network Connection Cable |
| Cable Length | 3.0 m (9.8 ft) |
| Cable Type | Shielded twisted‑pair + drain wire, blue PVC outer jacket (Belden type construction) |
| Connector A | 15‑pin male D‑subminiature (DB15M) – connects to 1784‑PKTX(D), 1770‑KF2, 1747‑KF2, or equivalent DH+ interface |
| Connector B | 5‑pin male mini‑round (mini‑receptacle / AMP‑type) – plugs into DH+ / RIO network tap or processor DH+ port |
| Pinout (DH+ Use) | Pins 2 & 3 (D‑sub) carry DH+ (–) and DH+ (+) differential pair; shield drained to D‑shell metal housing |
| Impedance | Approx. 120 Ω characteristic impedance (matches DH+ network specification) |
| Shielding | Overall copper braid shield tied to connector shell at DB15 end |
| Operating Temp. (Cable) | –20 °C to 60 °C (–4 °F to 140 °F) |
| Storage Temp. | –40 °C to 80 °C |
| Compliance | UL recognized component, CSA certified, RoHS (later production) |
| Compatible Networks | Allen‑Bradley Data Highway Plus (DH+ / DH485 with appropriate interface), Remote I/O (RIO) when wired per Rockwell pinout |
| Compatible Interfaces | 1784‑PKTX, 1784‑PKTXD, 1770‑KF2, 1747‑KF2, 1784‑PCMK (some revisions), PLC‑5 DH+ port, SLC 5/04 CH1 (DH+ mode), 1771‑ASB DH+ port |
