About the 0-52806-01
0-52806-01 Tach Loss Overspeed Board
The 0-52806-01 is a Reliance Electric board component manufactured for use within the company’s various drives. This board typically is marked as a Reliance board; however, in some cases, it may originate from Asea Brown Boveri (ABB) or possibly from Baldor-Reliance. Please note the part id will always reflect “52806-01.”
The 0-52806-01 functions as a Tach Loss Overspeed Board. Its primary function is to monitor speed-regulated systems tachometer signals and compare those with the main system’s speed reference. The 0-52806-01 has an attached front panel that includes access to a calibrating potentiometer on the circuit board’s surface. This is labeled “tach calibration.” The panel has two LED indicators that are labeled ‘tach’ and ‘overspeed.’ It has a reset button and a twelve position terminal strip with its own smaller cover that attaches with two screws. This front panel also has two set screws that lock the circuit board into place within a rack system.
The circuit board portion of the 0-52806-01 a relay located in one rear corner. It has one transformer that is marked by TR-12174 411027-5-R. The board has six integrated circuits, six transistors, various capacitors including disk capacitors, resistors, diodes, surface wiring, and terminal pins. Surface wires are used to connect larger components like the transformer to the board or to connect panel components to board components. The rear edge of the board extends in a conductive backplane connector.
More detailed information about the board, including details regarding installation and operation, may be found through Reliance publications like product manuals and series user guides.
