Contains:1 STK6822H Bipolar Driver, 52V 2.5A per phase max. 1 STK6982H 4° Unipolar Stepper Driver 52V 2.5A per phase max., 2 SLA 4031 (D) Dual Darlington Sink Driver with flywheel diodes. 4A @120V max each section. HFE 2000 min 5000 typical. Board is 4½" X 13" Aluminum chassis/heatsink 12"L x 4½"W x 2½"H. Board also has 2 x 12MHZ crystals, power transistors, logic and 28 dip switches for configuration/fine tuning. Sorry but we have no documentation for this part.
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