CAUTION: For NPN output connections, the external interface voltage (Vext)
must not exceed the Matrix 300N power supply source voltage (Vdc) otherwise
correct output functioning cannot be guaranteed.
CAUTION: For Matrix 300N PoE models, the internal Digital Output circuitry
is not powered and supply power is not available to any Input/Output devices
(Vdc=0). Only input device signals can be accepted directly on the M12
17-pin connector without power.
For these models, if it is necessary to use Input/Output devices, we recommend
connecting them through the CBX, which must be powered separately.