I'm building a "piggyback" to go with my Labjack U3 and have a question about the output of the G-5500 DIN connector.

As I understand the G-5500 manual, connecting certain pins to ground makes the rotator move in certain directions. What I measure is about 15Vdc on all of the "direction" pins relative to pin 8 which is ground.

Do I have something wrong with my G-5500 controller box? (not my piggback board).

thanks,

Bob W7OTJ