Pins Wiring Diagram; Input Port Circuit (Yang Connection) - wantai DQ542MA Manual

driver.
ENBL- ENBL- is the negative end of direction input pin. Usually left unconnected (enabled)

2) Pins wiring diagram:

PC's control signals can be active in high and low electrical level. When the high electrical
level is active, all control negative signals will be connected together to GND. When low
electrical level is active, all control positive signals will be connected together to public port.
Now give two examples ( Open collector &PNP), please check them:
Fig 1. Input port circuit (Yang connection)
PC open connector output