Each SMC12 card can control up to 12 low-current stall-type switchmotors. It does this by employing 6 identical circuits per card where each circuit controls 2 stall-motors. The big advantage of using the SMC12 card is that only one C/MRI output line is required per Tortoise machine. When the input line is high, polarity is applied to the switch motor in one direction and when low the polarity is applied in the opposite direction. The SMC is a great way to drive Switchmaster and Tortoise machines either with or without the computer.
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Note: The quoted prices for all circuit boards provided by JLC Enterprises are for the fabricated boards only, that is, without any electronic parts. All circuit boards come unassembled and less components. All holes are drilled and all circuit traces are tin plated for easy soldering. Where double-sided boards are provided, all feed through holes are plated-through. The SMINI, SUSIC, RS485, DIN32, DOUT32 and PGCC boards have solder masking on both sides, silk screen legend on component side and are factory tested against shorts and open circuits.