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Re: Motor Control Rules
Spike outputs happen to work on three wires, just like standard PWM cables. However, they are not the same sort of signal inside the wire. PWM is pulse-width modulation; it's a way of actually carrying a digital signal. The relays use one of the wires as ground and the other two as ground-power to control the two outputs on the relay module.
TL;DR:
Cables are the same, carried signals are not.
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