Reliance Electric 57C443 Remote I/O Scanner Interface Module

Description

The Reliance Electric 57C443 is a high-performance Allen-Bradley Remote I/O (RIO) Scanner Interface Module designed for the AutoMax Distributed Control System (DCS). This module serves as a bridge, allowing Reliance AutoMax controllers to communicate with and control Allen-Bradley remote I/O devices, such as remote racks, drives, and specialized adapters.

Historically part of the Reliance Electric product line (which transitioned to Rockwell Automation/Allen-Bradley), the 57C443 is a legacy component still vital for maintaining and expanding existing AutoMax control architectures. It acts as the “master” on the A-B RIO network, enabling high-speed data exchange and coordinated control over long distances.

RELIANCE 57C443

Product Parameters (Datasheet)

The following specifications define the electrical and functional capabilities of the 57C443 module:

Country of Origin

• Primary Origin: United States (USA)

Technical Description and Features

The 57C443 provides the essential link between the Reliance Multibus environment and the Allen-Bradley RIO protocol.

• Dual Functionality: While primarily used as a Scanner (Master), certain revisions and configurations allow it to function as an Adapter, though this is less common in AutoMax master racks.
• Scan Versatility: It can manage both analog and discrete I/O modules, and it supports the “Forcing” of inputs and outputs for testing and troubleshooting.
• Fault Management: The front faceplate features a 7-segment LED display that provides real-time diagnostic codes. If the “OK” LED is off, the fault code provides a direct reference to the instruction manual (J2-3088) for rapid identification of issues like bus errors or configuration mismatches.
• Integration: In an AutoMax rack, this card is required whenever an AutoMax processor needs to act as a master over an Allen-Bradley I/O network.

Product Usage and Installation Instructions

1. Module Installation

• Safety First: Always turn off the power to the AutoMax rack before inserting or removing the module. This module contains static-sensitive components; use an anti-static wrist strap.
• Placement: The 57C443 is typically installed in an AutoMax Multibus rack. Ensure the module is firmly seated and the captive screws are tightened.

2. Network Wiring

• Cable Connection: Use the standard A-B “Blue Hose” (1770-CD). Connect the shield to the ground terminal provided on the module faceplate to prevent EMI interference.
• Termination: Ensure a proper termination resistor (typically 82 or 150 ohms, depending on the baud rate and cable length) is installed at the end of the RIO trunk.

3. Configuration

• Addressing: The 57C443 supports 1/2, 1, and 2-slot addressing modes. These must match the dip-switch settings on the remote A-B racks.
• Software: Configuration is performed via the AutoMax Programming Executive software. You must map the remote I/O points to the AutoMax processor’s memory map.

4. Diagnostic LEDs

• OK (Green): Steady green indicates the module has passed its self-test and is operating correctly.
• FAULT CODE: If a number appears on the 7-segment display (e.g., Code 7 or Code 8), refer to the J2-3088 manual to check for communication timeouts or hardware failures.

Recommended Related Products (Reliance AutoMax Series)

If you are working with the 57C443, you may also require these complementary modules and accessories for your AutoMax system:

• 57C430/57C431: AutoMax Processor Modules (The “brain” that communicates with the 57C443).
• 57C404A: Network Communications Module (Used for R-NET or DCS-Net communication).
• 57C440: Generic Remote I/O Head (For standard Reliance remote I/O configurations).
• 57C328 / 57C330: Discrete and Analog I/O modules for local rack installation.
• 57C413B: Common Memory Module (Required for sharing data between multiple processors in a single rack).
• J2-3088: The official Instruction Manual specifically for the A-B Remote I/O Scanner.