Omron C200HW-PD024

The Omron C200HW-PD024 is a Power Supply Module designed for the SYSMAC C200HX, C200HG, and C200HE (collectively known as the C200H Alpha series) PLC systems.¹

Unlike standard power supplies that run on AC voltage, this specific model is a DC-powered unit, making it ideal for mobile applications, battery-backed systems, or telecommunications environments where 24V DC is the primary power source.²

1. Function and Purpose

The C200HW-PD024 sits on the far left slot of a C200H Alpha backplane. Its primary job is to:

• Convert the incoming 24V DC external power into the internal voltages required by the CPU and the various I/O modules on the rack.

• Provide a stable, filtered power source to protect sensitive electronics from electrical noise and voltage spikes.³

   

2. Technical Specifications

3. Key Features

• Run Output: Features a dedicated “Run Output” terminal (SPST-NO relay contact) that closes when the PLC is in RUN mode. This is often used to signal a “System Ready” status to external circuits or safety towers.

• Replacement for AC Models: It shares the same footprint as the AC models (like the PA204), allowing you to convert an existing C200H system from AC to DC power simply by swapping this module and updating the wiring.

• Rugged Terminal Block: Uses a screw-type terminal block with a protective cover, ensuring secure connections even in high-vibration environments.⁴

   

4. Comparison within the Series

It is important to distinguish this model from others in the C200HW family:

• C200HW-PA204: Standard 100-240V AC input.⁵

   

• C200HW-PA204S: AC input with a 24V DC service output for sensors.

• C200HW-PD024: This model (24V DC input, no service output).

5. Maintenance and Troubleshooting

• Fuse Replacement: If the “POWER” LED on the front of the module does not light up despite 24V DC being present at the terminals, the internal fuse may have blown. This is usually caused by a short circuit in one of the I/O modules or an accidental polarity reversal.

• Overload Protection: If the total current draw from all modules on the rack exceeds 4.6A, the power supply will automatically shut down or behave erratically to protect the hardware.