Switching The High Side Using External Power; Driving A Dc Relay To Control An Ac Load - Intermec IF5 User Manual

Switching the High Side Using External Power

Driving a DC Relay to Control an AC Load

IF5 Fixed Reader User's Manual
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 in the
next illustration.
+Output
- Output
Ground
Switching the High Side With External Power
While the IF5 outputs are designed to switch DC loads, they can
drive relays that control AC loads. The next illustration shows
how to connect such a system to an IF5 output.
Chapter 5 — Using the IF5 GPIO Interfaces
+ -
External
power
5-48 VDC
External
indicator
lamp
131