About the 0-60021-4
The 0-60021-4 is an AutoMax from Reliance Electric. The faceplate of this device has PMI Processor written across the top. Below that there is a green LED light labeled OK, a second green LED light labeled COMM OK, then a red LED light labeled P.M. FLT, a second red LED light labeled EXT FLT, and a third red LED light labeled RAIL FLT. Below the lights is a standard type terminal block labeled P! Meter Ports on the left and labeled one through four on the right of the block. Below the block are two small silver and black knobs stacked on top of each other labeled P2 and P3 and collectively labeled COMM Link. Below these knobs are two male ports stacked on top of each other collectively labeled P4 Rail Ports P5. The upper port has a zero on the right side and the lower port has a one on the right side. The back edge of the AutoMax has another male connection point. This is much larger than the ones on the front and secures the board into the rack along with the screw style anchors on the faceplate. There are three large microprocessors and over thirty microchips. The 0-60021-4 also features two crystal oscillators and two small inductors. The 0-60021-4 board also has a variety of larger capacitor and resistors on the side with the microchips and larger pieces. However, the back side has micro resistors and micro ceramic surface capacitors.
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