4 Channel Optically isolated board with DC-DC converter

This is a 4-channel optocoupler module features 4x PC817 optocouplers and an onboard DC-DC converter. It provides reliable electrical isolation between the processor and the high-voltage side. The high-voltage side can be configured as either pull-up or pull-down, while the low-voltage side supports both common-cathode and common-anode configurations. Configuration is selectable via onboard resistors. The integrated 5 V DC-DC converter supplies power to the low-voltage side.

D104