shadow_rusty Posted August 22, 2014 Report Share Posted August 22, 2014 (edited) Recently tried to get my Slot.It controller to work on a friends negative wired track... Plugged in my negative module, connected to the track, and dead shorted the power supply... Checked wiring, Black to track, Red to Posative / Track, Yellow to Negative. Yep, all looked ok. As it all seemed correct, I assumed that the module was stuffed. Had to race that night with multiple annoying Parma's... (Just never have liked them) Got home, and I remembered that I had used it on my standard scaley sport track before with an adaptor. Looked everywhere, but apparently I'd left the adaptor it at my fathers. None the less, I was determined to figure it out. I pulled the module off, seperate the board from the shell, and thought to myself, I'll remove the jumper which shorts the track during power off and retest. Still not working, but it was no longer shorting out the power supply. I then looked at it a little closer, and noticed that the solder point marked '+' had the yellow wire soldered to it, and the solder point marked '-' had the red wire soldered to it. So, I then swapped over my testing leads, and hey presto, everything worked. So then, it was off to the net to find out why I had it wrong... I figured that I must of messed up the wiring for negative tracks in my head, but no, I had it right, and slot.it had it wrong, well sort of... Turns out that while Slot.It have it correct here http://www.slot.it/D...ritySCP1.en.pdf They have Yellow and Red quoted incorrectly here (page 4) http://www.slot.it/D...uale-UK-1.1.pdf The colour scheme of the SCP-1 cables follows the standard US (Parma) colour coding. Inour opinion, it does not make sense to use anything other than red for battery power and anything other than black for ground, however since the long time standard established convention is different, we decided, reluctantly, to follow it. So: WHITE is +, RED is – (ground), BLACK is motor (track). If you have a DS connection box, colour will match the existing colours on the female plugs of the box. Anyway: plug the WHITE/YELLOW cable into the POSITIVE (+) terminal of your track; plug the RED cable into the NEGATIVE (-) terminal of your track; plug the BLACK terminal to the motor connector of your track, then go to the Quickstart common section chapter. Whilst that statement is true for Posative polarity tracks, it appears that they failed to notice that on a negative polarity track, Red is posative, not Negative. So, long story short, if you are having issues with a negative module, check that your module is soldered correctly with the correct colour scheme... I've now swapped them on the module so I don't get caught out again... Edited August 22, 2014 by shadow_rusty Quote Stolen from SlotsNZ Team ABC Team Leader (Ambitious, But Crap) Home Track Threads - Shadow's Semi-Permanent Layout & Another Rug Racer & Proud of It & Gymkhana Test Track Car Collection Thread - My Car Collection Charts / Diagrams - MJK Tyre Selector / Slot.it 4wd Gearing / PoliCar Rollout / Rollout Chart Generator / SCX 4wd Rollout / Track Wiring with Brake on Track Call Link to comment Share on other sites More sharing options...
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