The first pair (Vcc / GND) is power, it can be fed by your existing 24v power supply. The second pair (TTL in / TTL GND) is signal: spindle PWM and ground from the Arduino. Mind the polarity.
For further details check out this thread…
The first pair (Vcc / GND) is power, it can be fed by your existing 24v power supply. The second pair (TTL in / TTL GND) is signal: spindle PWM and ground from the Arduino. Mind the polarity.
For further details check out this thread…