About the 0-51378-31
The 0-51378-31 is a gate card produced by Reliance Electric. This is a small yet customizable card. The 0-51378-31 comes with two transformers toward the bottom of the card. These transformers have four wires (green, mauve, red, and yellow) attached to each and these wires are twisted together to keep them in order. At the end of each colored wire is a small attachment with a plastic insulator that allows the wires to be connected to another circuit board using a thin metal tab. There is space above these to add to additional transformers if needed. These openings for additional transformers are labeled 417102-11T. There are two small wires labeled J1 and J2 at the top edge. There is also a yellow and a black wire attached directly to the circuit board. There are seven metal attachments on the left edge that are boxed off and numbered (from top to bottom) 445, 447, 120, 16, 18, 178, and 19. The 0-51378-31 also has two Zenner diodes (orange with a black line) labeled D3, and D4. There are two open places to add two more diodes labeled D1 and D2. On all four lines, the diodes are on is a small circle on one side. This circle is used to indicate where the line on the diode should face. There are also two light blue carbon film resistors labeled R3 and R4. There are two openings to add two additional resistors labeled R1 and R2.
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