RELIANCE 57C404C upgraded high‑performance R‑NET network communication module_Ningde Androld Automation Equipment Co.,Ltd.

June 01, 2026

RELIANCE 57C404C upgraded high‑performance R‑NET network communication module

The RELIANCE 57C404C is an upgraded high‑performance R‑NET network communication module for the AutoMax industrial control platform, serving as a direct revision of the 57C404B. It fits a single‑slot standard AutoMax rack, enabling high‑speed, isolated data exchange between AutoMax processors, distributed I/O racks, and external devices over the proprietary R‑NET fieldbus. Built with industrial‑grade components and enhanced surge/noise suppression, it delivers improved stability, wider compatibility, and longer service life for harsh manufacturing and process environments.

Description

Product Overview

Model Definition

RELIANCE: Brand of industrial control products (now part of ABB/Baldor).

57C: Designates the AutoMax/DCS 5000 series I/O and communication module family.

404: Base model code for R‑NET communication modules.

C: Upgraded hardware/firmware revision; enhanced isolation, faster fault recovery, and broader node compatibility vs. 57C404B.

Technical Parameters

Network Protocol: Proprietary R‑NET (Reliance Network) for AutoMax systems.
Communication Speed: Up to 1 Mbps (R‑NET backbone).
Supported Nodes: Up to 32 nodes per segment; improved arbitration for heavy traffic.
Galvanic Isolation: 2500 VAC RMS between network and backplane; reinforced insulation.
Operating Voltage: 5 VDC and ±12 VDC (backplane‑powered).
Operating Temperature: 0 °C to +60 °C; extended thermal tolerance.
Status Indicators: Dual LEDs (OK/Fault) plus network activity LED for diagnostics.
Installation: Single‑slot, hot‑swap capable in standard AutoMax racks.
Compatibility: Fully backward compatible with 57C404B; supports AutoMax firmware V7.0+.

Interface and Communication Configuration

Backplane Interface: Dedicated edge connector for power and Multibus data.
Network Port: Isolated RJ45 or terminal block for R‑NET; improved ESD protection.
Communication Mode: R‑NET master/slave; peer‑to‑peer data sharing between AutoMax processors.
Configuration: Node address, baud rate, and redundancy set via AutoMax system software.
Redundancy: Supports dual‑module redundant communication paths for high‑availability systems.

Core Functions

Establishes and manages R‑NET network communication for distributed AutoMax systems.
Transmits real‑time control data, status, and diagnostics between controllers and remote I/O.
Provides reinforced galvanic isolation to block electrical noise and faults from the field.
Supports network-wide configuration, node addressing, and fast fault localization.
Enables redundant communication to minimize downtime in critical processes.
Enhances data integrity with improved error checking and retransmission logic.

Application Scenarios

Process industries: Steel, pulp and paper, water treatment, chemical, and power plants with distributed control.
Factory automation: Assembly lines, material handling, and packaging machinery requiring multi‑rack coordination.
System integration: Connecting AutoMax processors, remote I/O, and third‑party devices via R‑NET.
Motion control: Synchronizing multiple drives and controllers in complex motion applications.
High‑availability systems: Critical processes requiring redundant communication paths.

Operation and Maintenance Instructions

Power off the rack before installation or removal.
Insert the module into the designated slot and ensure firm backplane contact.
Wire the R‑NET network to the correct port, observing polarity and termination rules.
Configure network parameters (node address, redundancy) via AutoMax software.
Keep the rack clean, dry, and ventilated; avoid corrosive gases and excessive vibration.
Monitor LEDs regularly; replace with the same part number if faults persist.
Do not disassemble or modify the module; repairs require authorized personnel.
Update system firmware to V7.0+ for full compatibility with 57C404C features.

Contact Info