MoTeC Global Forum

Hi all,

Apologize, this is my first time purchased the PDM, and I have a few questions about the PDM15 outputs:
-On PDM15 20A pinout copy, example: on 34 pin connector, pin A1:20A output 1(with A10), is this mean we have to bridge A1 with A10 pin to get 20A? So each A1 and A10 are 10A?
And how about the wiring size, 16awg for both A1 and A10 is good?

-Can I use one output to power a few devices? Ex: ECU+Dash+EPS ECU in one output.

Please advise.
Thanks a lot.

Kund Regards,
Ellis A.

Yes, both pins 1 and 10 make up 20A output 1 and you need to hook the load up to both pins.

If you look on page 43, Motec list #18 of the Tefzel insulated wire as good for 11A max at 80 degree ambient temperature but 9A at 100 degrees. So the suitability of an #18 wire on each pin would depend on duty cycle and expected temperature, #16 is good for 12A at 100 degrees. I am using #16 wire for each pin of the 20A outputs myself. In the good Tefzel or Raychem 44 spec stuff, #16 is pretty small.

You could certainly use one output to power multiple devices, you just have to think about the maximum current if they are all on the go at once and the reliability factor of what things you would put on a single circuit. I am going to have power for the power windows, mirrors, reversing lights and cameras all on one output, none of those are immediate show stoppers if one of them develops a fault and trips the output. Fuel pumps will all be on separate circuits (If for no other reason than I hope to be able to distinguish by current draw when the lift pump looses supply in order to bring on a low fuel light)

the_bluester wrote:Yes, both pins 1 and 10 make up 20A output 1 and you need to hook the load up to both pins.

If you look on page 43, Motec list #18 of the Tefzel insulated wire as good for 11A max at 80 degree ambient temperature but 9A at 100 degrees. So the suitability of an #18 wire on each pin would depend on duty cycle and expected temperature, #16 is good for 12A at 100 degrees. I am using #16 wire for each pin of the 20A outputs myself. In the good Tefzel or Raychem 44 spec stuff, #16 is pretty small.

You could certainly use one output to power multiple devices, you just have to think about the maximum current if they are all on the go at once and the reliability factor of what things you would put on a single circuit. I am going to have power for the power windows, mirrors, reversing lights and cameras all on one output, none of those are immediate show stoppers if one of them develops a fault and trips the output. Fuel pumps will all be on separate circuits (If for no other reason than I hope to be able to distinguish by current draw when the lift pump looses supply in order to bring on a low fuel light)

Thanks a lot for the explanations. That's help a lot.
Kind Regards,

Ellis A.