RELIANCE 57C420 high-density DC digital output module
The RELIANCE 57C420 is a high-density DC digital output module designed for the AutoMax industrial control platform. It adopts a standard single-slot rack-mount structure, serving as a core component for controlling on-site actuators in automated systems. With 32 independent output channels, each supporting 5–24VDC voltage output and 750mA current drive capability, it features 5000V isolation between logic and output circuits, delivering strong anti-interference performance and stable long-term operation in harsh industrial environments.
Description
Product Overview
The RELIANCE 57C420 is a high-density DC digital output module designed for the AutoMax industrial control platform. It adopts a standard single-slot rack-mount structure, serving as a core component for controlling on-site actuators in automated systems. With 32 independent output channels, each supporting 5–24VDC voltage output and 750mA current drive capability, it features 5000V isolation between logic and output circuits, delivering strong anti-interference performance and stable long-term operation in harsh industrial environments.
Model Definition
RELIANCE is the brand of industrial control products. 57C denotes the system and I/O module series of the AutoMax platform. 420 is the specific model code for the high-density DC output module. This model has no suffix, representing the standard hardware version, and is fully compatible with all standard AutoMax racks and system firmware.
Technical Parameters
Power is supplied via the rack backplane with a working current of 2.5A at 5VDC. It has 32 output channels, each with a rated voltage of 5–24VDC, a maximum operating voltage of 30VDC, and a per-channel current of 750mA. The isolation voltage between logic common and outputs is 5000V, with four outputs per isolated common. The operating temperature ranges from 0°C to 60°C, and the relative humidity is 5%–90% non-condensing. The front panel is equipped with 32 LED indicators (labeled 0–31) for channel status display.
Interface and Communication Configuration
The rear connector connects to the rack backplane for power supply and internal data transmission via the dedicated AutoMax bus protocol. The front panel has two RS-232 ports (CN1, CN2) for module configuration and debugging, compatible with 57C376 cables (sold separately). It uses the AutoMax proprietary communication protocol to exchange data with the controller, supporting real-time output control and status feedback. No additional external communication ports are provided.
Core Functions
It provides 32-channel high-density DC output for direct control of field devices such as relays, contactors, solenoid valves, and indicators. It features 5000V electrical isolation to protect the system from voltage surges and noise interference. It supports independent on/off control of each channel with status indicated by corresponding LEDs. It enables high-speed response and reliable data transmission via the AutoMax bus. The compact single-slot design saves rack space and simplifies system configuration.
Application Scenarios
Widely used in industrial automation fields such as metallurgy, papermaking, chemical processing, power generation, and machinery manufacturing. It is suitable for AutoMax-based distributed control systems requiring multi-channel digital output. It is ideal for controlling a large number of on-site actuators in production lines, conveyor systems, and packaging equipment. It is also applicable to legacy Reliance device renovation and expansion projects.
Operation and Maintenance Instructions
Disconnect system power before installation or removal. Insert the module into the designated rack slot and ensure secure backplane connection. Use the front RS-232 ports with 57C376 cables for configuration and debugging. Regularly check channel status LEDs for fault diagnosis. Keep front ports clean and dry to avoid poor contact. Do not disassemble or modify the module without authorization. Replace with the same model promptly upon failure to ensure continuous control system operation.
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