Q S I 5 0 0 S E R I E S U S E R G U I D E
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The image below summarizes how the Guider Port and compatible cable are wired:
Note:
The Guider Port outputs employ optically isolated solid-state switches that
mimic the traditional behavior of older technology mechanical relays. The optical
isolation prevents potentially interfering or damaging ground loops between the
camera and mount.
This newer approach is compatible with most modern telescope mounts (Meade,
Losmandy, Software Bisque, etc.) that employ logic inputs pulled to VCC with a
suitable load resistor.
QSI also offers a Guider Break-Out Box with mechanical relays that can be
employed to adapt to virtually any older or non-standard mount configuration.
Caution:
Do not apply more than 50v or 50ma to the guider port pins. The
'Common' input must be at ground, or zero volt potential relative to the control
inputs of your mount. Contact QSI if you are uncertain about your mount's
electrical characteristics.