User`s manual

Chapter 5 — Using the IF30 GPIO Interfaces
IF30 Fixed Reader User’s Manual 77
Switching the High Side Using 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 as shown below.
Switching the High Side With External Power
External
indicator
lamp
External
power
5-48 VDC
+
-
Ground
+Output
-Output