ps2 upgrade for my B unit

You can install it and run as lash up.  There is no way to make the ps-2 processor function as a slave.  You can always have some one upgrade the b unit with the slave kit. 

You can also get the sounds repaired on your bottom board.  I do that type of work/repair.  G

Thanks, I am going to try to run the unit as a lash up.   Don

After a good night sleep I had another question. Your suggestion to upgrade the b unit with the slave kit would require some type of signal from the A unit board which is a ps2 upgrade. I did not think this was possible. Are all ps2 boards now the same? Purchasing a slave unit for the b unit sounds interesting.  Don

what engine was converted?  Yes the board are the same, the kit includes harnesses that take certain outputs off the ps-2 board an input them to the slave.  The slave mimics those inputs for motor function, smoke.  The functions of lights, coupler are specific for the rear unit.  One thing that needs to be upgradable is the trucks where the external harness connection match up.  Similar to how AA or ABA connect via harness.  G

The A & B units are MTH Alco PA & PB units both powered. Both have the old QSI boards. I have a dummy A unit to go with the set. The signal from the present A unit was a 4 wire harness which carried thru the B unit to the A unit dummy. The B unit power was synced with the A unit from a kit supplied QSI which involved a 3 wire harness from the A to B using the A unit forward and reverse signals. The B unit also had a smoke unit which I have removed.

It could be done with some customization of an ABA kit, or the Turbine kit.  Normally the b is a dummy with a pass thru harness, in this case the b is powered, and we need to pass into the dummy trail a the lights and coupler.  Not for the faint of heart.  G

G---Custom work or wiring is not a problem and I believe my heart is up to the task. What I think my the question is " On the ps2 upgrade board being installed in the A unit where will I find the output signal {wire/plug/board} connections to bring the control signals the B unit will need for motor control only?) These are those required for a normal slave board input. In other words I want to make the old ps2 upgrade board into a slave board. I am not concerned with lights & coupler functions with the dummy A unit. Thanks Don

Don, you can't make the ps-2 board a slave board, but the signals you need to send over to a slave board are motor leads, 5V.  I don't have access right now to my notes to tell you where they go into the slave board.   I can do that next week.  G

Thanks G, I really appreciate all your help and staying power. I will look forward to receiving your next installment. Have a good weekend. Don

Ok, If you have a slave board it has a 10 pin connector that takes the inputs from the Master Engine.  It also has a 7 pin connector that takes track power from the B unit. Looks same as the PS-2 7 pin just no wires for tach.  It also has the 5 pin for motor, 4 pin for smoke and 8 pin for lights.  Since you only want to run motors you would wire the 5 pin to the motors, and use the 7 pin to power the slave board.

From the lead engine you need to bring in PCB ground (Pin 10 of 12 normally Blue), Motor Yellow and White, and Positive Voltage (Pin 2 of 12 normally Purple).  These would go to the 10 pin connector on the Slave board.

PCB Ground to Pin 1, Motor Yellow to Pin 3, Motor White to Pin 4 and PV to pin 2.

This would than allow the Slave board to mimic motor control functions.  G