RELIANCE 57442-1C Allen‑Bradley Data Highway Interface Module_Ningde Androld Automation Equipment Co.,Ltd.

June 01, 2026

RELIANCE 57442-1C Allen‑Bradley Data Highway Interface Module

The RELIANCE 57442-1C is an Allen‑Bradley Data Highway Interface Module for the AutoMax DCS 5000 platform. It enables high‑speed, deterministic communication between AutoMax controllers and Allen‑Bradley (A‑B) PLCs, I/O devices, and HMIs over the Data Highway network. The “1C” denotes a hardware revision with enhanced firmware, improved electrical isolation, and higher noise immunity for industrial environments.

Description

Product Overview

Model Definition

RELIANCE: Brand (now part of ABB/Baldor).
57442: Core series for A‑B Data Highway Interface Modules in AutoMax systems.
1C: Revision identifier, indicating an upgraded variant with optimized signal integrity and compatibility.
Alternative Part Numbers: 0-57442-1C (full OEM number), 57C442 (industry shorthand).

Technical Parameters

Backplane Power: 5VDC, 650mA (3.25W).
Network Protocol: Allen‑Bradley Data Highway (DH).
Network Speed: 8Mbps maximum.
Memory: 32K dual‑port RAM (shared between backplane and network).
Node Capacity: Supports up to 32 nodes on the DH network.
Operating Temperature: 0°C to +60°C; storage -40°C to +85°C.
Diagnostics: 7‑segment LED (fault codes), green “OK” LED, red “FAULT” LED.
Form Factor: Single‑slot AutoMax rack; industrial‑grade, IP20.
Certifications: UL, CE; ESD/surge protected.

Interface & Communication Configuration

Backplane Interface: Connects to AutoMax DCS 5000 backplane for power and internal data exchange.
Data Highway Port: Isolated DB9 or terminal‑block connector for A‑B DH network; supports daisy‑chain topology.
Front‑Panel Indicators:
- OK (Green): Module powered and operational.
- FAULT (Red): Communication error or hardware fault.
- 7‑Segment Display: Shows fault codes (e.g., “E01” for network timeout).

Core Functions

Protocol Conversion: Translates AutoMax backplane protocol to A‑B Data Highway, enabling seamless integration with Rockwell Automation devices.
Data Routing: Exchanges I/O data, control commands, and status information between AutoMax and A‑B systems.
Network Management: Manages DH network traffic, ensuring deterministic data delivery and collision avoidance.
Diagnostic Monitoring: Real‑time fault reporting via LEDs and 7‑segment display for quick troubleshooting.
System Expansion: Facilitates integration of A‑B I/O racks and HMIs into AutoMax‑based DCS.

Application Scenarios

Used in large‑scale industrial automation across metallurgy, steel, mining, paper, and material handling. Ideal for plants with mixed AutoMax and Allen‑Bradley systems (e.g., rolling mills, conveyor lines, cranes, and plant‑wide DCS installations). Fully compatible with AutoMax DCS 5000 and Mark V systems.

Operation & Maintenance Instructions

Installation: Power off the rack before insertion. Seat firmly in a single slot and secure. Connect DH network wiring per terminal labeling; set node address via module switches.
Operation: Keep the rack area dry, ventilated, and free of dust/corrosive gases. Monitor front‑panel LEDs and 7‑segment display for status/faults.
Maintenance: Periodically check connectors for tightness/aging; clean indicators and ports. Avoid static electricity when handling.
Troubleshooting: If fault codes appear, power off, re‑seat the module, and inspect DH wiring. Do not disassemble the housing. Replace only with 57442-1C or compatible 57C442 to ensure network compatibility.

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