OVERVIEW

Official designation: Allen-Bradley 1779-KP5 (Data Highway II/Plus, Interface Module)

Role/Application: The 1779-KP5 module links Data Highway II networks with Data Highway Plus subnetworks, providing a high-speed communication gateway primarily for PLC-5 family controllers.

KEY SPECS SUMMARY

Power: 115/230 V AC, 50/60 Hz, 1.5 A

Interfaces / Ports: Twinaxial DH+ port, DH II port

Indicators: Status Indicator LEDs, 7-Segment LED error codes

Operating Temp: Refer to the latest manufacturer manual.

Platform / Compatibility: PLC-5 family controllers, DH II/DH+

Limit: DH+ Baud rate up to 1 Mbit/s

Lifecycle: Discontinued by manufacturer

FREQUENTLY ASKED QUESTIONS

Technical Specifications:

Q: What is the maximum communication speed supported by the 1779-KP5 module on the DH+ network?

A: The module supports a maximum DH+ network baud rate of 1 Mbit/s, depending on network segment distance.

Wiring & Installation:

Q: What type of cable and connector is required for the Data Highway Plus network connection on the 1779-KP5?

A: DH+ network connections utilize twinaxial cable and a station connector kit, often requiring a 150 Ohm terminating resistor.

Troubleshooting & Compatibility:

Q: How can a technician diagnose the 1779-KP5 module's status in a running system?

A: Status is monitored using the front panel indicator LEDs and the 7-segment LED error display codes.

Replacement & Upgrades:

Q: Since the 1779-KP5 is obsolete, what is the recommended modern Allen-Bradley replacement technology?

A: The standard long-term replacement and upgrade path for the obsolete PLC-3 system is to migrate to the ControlLogix platform.