24V is coming from the PLC so probably from the PLC power supply.
What do you mean that it will be difficult to hold on ?
But okay it doesn't matter for me I can buy the one you suggest.
But is it that easy that in that case:
IN1-IN8 signals from digital outputs from Due 0/3,3V
Vs= 24V
GND = GND (connected to the arduino GND ? )
Then OUT1=OUT8:
OUT1 will be high (24V) when IN1 is high 3,3V ?
No need for extra resistors/capacitors and no problem with high current?