The new PSXX will indicate when a block is shorted. This circuit will indicate a short is in the block as opposed to the PSXX simply being off [D7 LED off, D17 LED on]

  • J4-3 [-] and J4-4 [+] are connected together [up to 5 mA] when the breaker has detected a short circuit and open during normal operation.
  • This is an optically isolated open collector transistor and provides no power.
  1. A resistor is optional to dim the LED
  2. J43 connects to LED anode
  3. J72 connects to LED cathode