
Connecting multiple CNC4PC C55 Dual 25A Relay Boards for simultaneous relay activation is straightforward. Here's a breakdown of the process:
Daisy Chaining: The C55 boards are designed for easy daisy-chaining. This allows you to connect multiple boards together, effectively multiplying the number of relays you can control. Each board features two RJ45 connectors, one for input and another for output, allowing you to link up to 4 boards.
Wiring: Use RJ45 connectors or terminal connections to link the boards. Refer to the CNC4PC C55 user manual for the RJ45 pinout diagram to ensure correct wiring. The manual also includes sample wiring diagrams that illustrate the connections.
Power Supply: Each C55 board requires a 12VDC power supply, rated for at least 200mA. When daisy-chaining, ensure your power supply can handle the total current draw. For each connected C55 board, factor in an additional 200mA, up to a maximum of 400mA per board in a cascade configuration.
Configuration Jumpers: Utilize the jumpers and dipswitches on each board to configure delay types and times for relay activation or deactivation. The CNC4PC C55 user manual provides detailed instructions and settings to achieve your desired sequence and timing.
Relay Activation: Based on the settings and configuration chosen, you can activate the relays using various input signals and delays. Carefully review the user manual to confirm proper jumper settings to achieve the intended relay activation sequence.
By carefully following these steps and consulting the CNC4PC C55 user manual, you will be able to set up multiple C55 boards for synchronized relay activation.


