|GeckoPwr III Motor Connector Pin Assignments|
There are separate connectors for each X, Y and Z stepper motor.
The individual motor connectors are female DB9,
Connections for motor phase circuits, there are home limit switch input and +5 Volt output.
Pins 1 and 6 are not connected to anything internally.
Pins 2 and 3 are for Phase A and B of the motor.
Pins 4 and 5 are for the Phase C and D of the motor windings.
Pin 7 is +5 Volts for powering active home limit switches.
Pin 8 is home limit switch sense input, there is a pull up to the motor power. Normally 1.2 Volts will be read between ground and this pin, the LED in a optoisolator is being turned on all the time, until the switch closes and shorts the input. This makes the circuit very resistant to electrical noise.
Pin 9 is ground the return side of the switch.
Stepper Motors with Unipolar windings can also be used.
Home Page at http://www.super-tech.com