Chapter 5 — About the GPIO Ports
IF1 Fixed RFID Reader User Manual 63
How to Switch the High Side with External Power
To use external power (5 to 48 VDC) to switch the high side, connect the
Ground pin to the ground system of the external power supply, and
connect the positive side of the external supply to the +Output pin. The
external indicator lamp is connected to the corresponding
-Output and Ground pins.
Switching the High Side with External Power