Allen Bradley 1785-KE Data Highway Plus Communication Interface Module

Overview

The Allen-Bradley 1785-KE is a communication interface module designed for use with the Data Highway Plus (DH+) network. It provides two communication interfaces: one DH+ port for industrial networks and one RS232 interface for point-to-point communication. The module is mounted in a 1771 chassis and supports a variety of Allen-Bradley PLC controllers, such as the PLC-2, PLC-3, PLC-4, and PLC-5. This module was discontinued by Rockwell Automation on 12/31/2012.

Technical Specifications

• Manufacturer: Rockwell Automation

• Part Number: 1785-KE

• Brand: Allen-Bradley

• Product Type: Data Highway Plus (DH+) communication interface module

• Module Type: Communication Interface

• Mounting: 1771 I/O chassis

• Compatible Controllers: PLC-2, PLC-3, PLC-4, PLC-5

• Ports:

  • One DH+ port
  • One RS232-C interface

• Transmission Speeds:

  • DH+: Up to 57,600 bps
  • RS232-C: 110 to 19,200 bps

• Communication Cable: 1770-CD for DH+

• Max Modules per System: 4

Electrical Specifications

• Power Supply: 1.2 Amperes at 5VDC
• Current Draw: 1.2 A at 5VDC (Backplane current)
• Required External Power: None
• Operating Temperature: 0°C to 60°C
• Storage Temperature: -40°C to 85°C
• Relative Humidity: 5% to 95% (non-condensing)

Physical Specifications

• Dimensions:
  • Width: 4.5 in (115 mm)
  • Depth: 12.4 in (317 mm)
  • Height: 6.3 in (160 mm)
• Weight: 1.81 lbs 
• Coating: Conformal coat for environmental protection
• Wiring Arm: 1771-WN

Performance Specifications

• Typical AC Signal Delay (Off): 29 ms ± 8 ms
• Typical DC Signal Delay (Off): 30 ms ± 7 ms
• LED Indicators: One per channel for diagnosis/status