About the 0-52821-1
0-52821-1 RPOB Circuit board
The 0-52821-1 is a module component fabricated by Reliance Electric for use in the company’s various drive systems. The 0-52821-1 is comprised of a front faceplate attached to a single circuit board. This component is typically marked as coming from Reliance Electric; however, depending on the year the board was manufactured, it may be marked with a logo indicating it originated from ABB or from Baldor-Reliance. In all these cases, the 52821-1 part should remain.
The 0-52821-1 includes a faceplate that includes two LED indicators. These indicators are both red and are located in the top third of the board. They are labeled Power and Data Valid. The other component located on the front faceplate is a terminal strip with six screw connections. This terminal strip has its own black cover plate that connects to the faceplate via two screws. The screw mounts are each individually labeled. The faceplate mounts into a rack system and is secured using set screws.
The circuit board portion of the 0-52821-1 is connected to the faceplate using screw mounts. It has a single large transformer with multiple colored wired connections. The board also has several integrated circuits, transistors, diodes, resistors, and capacitors. Disk capacitors are used on this board. The board also uses several resistor network arrays. More information about how the board operates may be found by accessing Reliance publications. This includes manuals, data sheets, and user guides.
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