1785-KA | Allen-Bradley | PLC 5 Communication Adaptor Module

Description

• Manufacturer: Rockwell Automation
• Part Number: 1785-KA
• Module Type: Communication Adaptor Module
• Brand: Allen-Bradley

Specifications

• Required Backplane Current: 1.4 A at 5 V DC
• Interface Ports:
  • Data Highway
  • Data Highway Plus
  • Allen-Bradley Industrial Terminal (Series 1784)
• Communication Speed: 57.6 kb (Data Highway and Data Highway Plus)
• Max Modules Per System: 4
• Weight: 0.3 lbs (0.1 kg)
• Dimensions: 4.5 x 12.4 x 6.3 in (115 x 317 x 160 mm)
• Coating: Conformal Coat
• Required External Power: None

Operation & Function

• Connection to PLC Processor: Direct connection to Channel 3 of PLC-5 processor
• Process Messages: Supports communication with PLC processors
• LED Indicators: 1 diagnosis/status LED per channel
• Switches:
  • SW1: Selects DDH+ and Data Highway communication rates
  • SW4, SW5, SW6: Set redistribution point (node addresses)
  • SW2 and SW3: Reserved for future use

Performance Details

• AC Signal Delay (Off): 29 ± 8 ms
• DC Signal Delay (Off): 30 ± 7 ms

Installation & Environment

• Wiring Arm: 1771-WN
• Operating Temperature: 0 to 60°C
• Storage Temperature: -40 to 85°C
• Keying Position: Between pins 4-6 and 24-26

Usage Notes

• Communication: Enables direct communication with PLC-5 processors and Data Highway Plus network
• Modules per System: Supports up to 4 modules per system