Advanced Dual Frog Juicer Information
You can use the Dual Frog Jucier as an autnomatic polarity reversal unit for either 2 frogs, for a Reversing Section, or as a Circuit Breaker.
To use for a reverser, you put ON (across both gold pins) the Pair Outputs jumper. This forces the two outputs to stay opposite in polarity. (If they are both the same polarity then current will not flow and the locomotive will be off.)
Note: If there is no CB jumper then the dual is too old to use as a circuit breaker.
The following features work on the latest model fo the DFJ - it will have holes marke 1A, 1B,C 2A,2B on the edge of the board.
If for some reason you end up with two cascaded dual frog juicers - that is the input of one is coming off the output of another frog juicer you can force the first DFJ to delay slightly to allow the second one to switch first. Add a wire jumper across the two holes marked "DE" right next to the blue input connector on the first DFJ.
To use as a circuit breaker you jumper a wire across the 2 holes marked "CB". This also turns on the delay so putting a jumper across DE will have no effect if CB is jumpered. The trip level can be 2A or 4A. We receommend trying 2A first but if you are having trouble with the board thinking there are shorts when there is a heavy load you can change to 4A.
A DFJ/Circuit Breaker makes an excellent protection device for the mono, dual and hex frog juicers. It has been carefully balanced to work seamlessly as a circuit breaker for our other juicers. If you have a large investment in hex frog juicers you will want to consider adding a CFJ upstream of the juicer inputs.
The holes marked 1A,1B,C,2A,2B are used for indicator LEDs. The resistors for the LEDs are built in to the boards. How to wire these up is covered in the manual.