Product Details
Overview
The 1785-KE by Allen-Bradley is a versatile communication interface module tailored for Data Highway Plus (DH+) networks. It provides industrial networking through a DH+ port and supports point-to-point connections via RS232-C. Designed for installation in a 1771 I/O chassis, it is compatible with multiple PLC families, including PLC-2, PLC-3, PLC-4, and PLC-5. This module is discontinued by Rockwell Automation as of December 31, 2012.
Technical Specifications
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Manufacturer: Rockwell Automation
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Brand: Allen-Bradley
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Part Number: 1785-KE
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Product Type: Data Highway Plus (DH+) Communication Interface Module
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Module Type: Communication Interface
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Mounting: 1771 I/O chassis
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Compatible Controllers: PLC-2, PLC-3, PLC-4, PLC-5
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Ports:
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One DH+ port
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One RS232-C interface
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Transmission Speeds:
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DH+: up to 57,600 bps
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RS232-C: 110–19,200 bps
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Communication Cable: 1770-CD for DH+
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Max Modules per System: 4
Electrical Specifications
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Power Supply: 1.2 A at 5VDC (backplane)
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Required External Power: None
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Operating Temperature: 0°C to 60°C
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Storage Temperature: -40°C to 85°C
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Relative Humidity: 5–95% (non-condensing)
Physical Specifications
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Dimensions: 4.5 x 12.4 x 6.3 in (115 x 317 x 160 mm)
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Weight: 1.81 lbs (0.82 kg)
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Coating: Conformal coated for environmental protection
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Wiring Arm: 1771-WN
Performance Features
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Typical AC signal delay: 29 ± 8 ms
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Typical DC signal delay: 30 ± 7 ms
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LED indicators: One per channel for status and diagnostics
Applications
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Industrial PLC networks requiring DH+ communication
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Systems requiring RS232 point-to-point device connections
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Factory automation and control panel integration
FAQ
Q: Is 1785-KE compatible with PLC-5 controllers?
A: Yes, it supports PLC-2 through PLC-5 controllers when installed in a 1771 chassis.
Q: What cabling is required for DH+ communication?
A: A 1770-CD communication cable is recommended.
Q: Can this module operate without external power?
A: Yes, it draws power directly from the backplane at 5VDC.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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As control systems evolve across modern factory automation, understanding the root causes of these interruptions helps engineers minimize costly downtime. This technical guide breaks down why PLCs trip into Stop mode and provides practical strategies to mitigate system faults.
Understanding Root Causes of Unplanned PLC Stop Mode in Industrial Automation
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