The ABB SDCS-OPL-H01 is an optical power link board.

A DC power supply module is a circuit board that converts AC mains power (the kind that comes out of your wall outlet) or DC battery power into a regulated DC voltage level. They are used in a wide variety of electronic devices to provide power to their circuits.

There are two main types of DC power supply modules: linear regulators and switching regulators.

• Linear regulators use a voltage divider circuit to reduce the input voltage to the desired output voltage. They are simple and inexpensive, but they waste energy as heat.
• Switching regulators use a switching transistor to turn the input voltage on and off rapidly. This creates a pulsed DC output that is then filtered to create a regulated DC voltage. Switching regulators are more complex than linear regulators, but they are more efficient and can provide a wider range of output voltages.

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