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Optional optocoupler board

The optional optocoupler board is used to leave the existing motor limit switches untouched. With this it is possible to use the limit switches inside the satellite motor for end and referance points. The original function of the limit switches, to cut of the power when driving to far, is untouched. With the optocoupler board it is not needed to add extra switches to the satellite motor. It also reduces the amount of wires from the Fibo-Box to the dish.

The optocoupler board measures the voltage over the limit switches. Normaly the limit switches are closed, so there is no voltage over the limit switch. If the limit switch is switched the contact is open and the motor voltage of 36V is over the limit switch. With one optocoupler board it is possible to measure 4 limit switches, therefor it can be use for two satellite motors.