Overview

The 57C404C is a network communications module for the Reliance Electric AutoMax PLC rack. It converts data from the proprietary backplane into a serial network protocol, enabling multiple AutoMax racks to share control and status information. The "C" revision indicates updated firmware for improved compatibility and reliability. This module is essential in distributed control systems where synchronized operation across multiple racks is required.

Technical Data

Typical Applications

The 57C404C enables coordinated multi-rack AutoMax systems, commonly used in:

• Large-scale process lines

• Conveyor systems

• Continuous manufacturing operations

Its RS-232 monitor port allows technicians to perform local diagnostics and system health checks, ensuring seamless, high-speed data integrity across distributed control networks.

FAQ

Q1: What is the main purpose of the two thumbwheel switches?
A: They set the unique Drop Number (Node Address) of the module on the network, identifying the specific AutoMax rack in multi-rack systems.

Q2: Does the 57C404C support standard protocols like Modbus or Ethernet?
A: No, it uses a proprietary Reliance Electric synchronous network. Interfacing to standard protocols requires other modules (e.g., 57C414).

Q3: What is the difference between the NETWORK and MONITOR ports?
A: The NETWORK port (9-pin) handles high-speed rack-to-rack communication; the MONITOR port (25-pin RS-232) is used for local diagnostics only.

Q4: Is this module designed for redundant systems?
A: No, it is a single-channel network module. Redundancy requires additional hardware or specific system configurations beyond this card.