58
IF2 Network Reader User Guide
Since the outputs are optically isolated, you can configure each one to switch the
high side or the low side of the load. You can power the load directly from the IF2 or
from an external power supply.
In a typical application, the outputs control indicator lamps that signal good reads
or errors. The basic methods for connecting external devices to the GPIO outputs
include:
•
Switching the high side, with the load powered by the IF2
•
Switching the low side, with the load powered by the IF2
•
Switching the high side, with the load powered externally
•
Driving a DC relay that controls an AC load
These methods are shown in the next examples.
Switch the High Side with IF2 Power
In this example, an external indicator lamp (0.25 A maximum current) is connected
to the -Output and Ground pins, and the correspOutput pin is connected
to the +12 VDC source.
Switching the High Side
Switch the Low Side with IF2 Power
For low side switching applications, the lamp power is routed to all the lamps in
common and the low side of the load is routed to the switch.
In this method, connect the external indicator lamp to the +Output and +12 VDC
pins, and short the corresponding -Output pin to ground as shown.
External
indicator lamp
0.25 A maximum
+Output
+12 V
Ground
- Output
Summary of Contents for IF2
Page 1: ...User Guide IF2 Network Reader ...
Page 8: ...vi IF2 Network Reader User Guide ...
Page 10: ...viii IF2 Network Reader User Guide ...
Page 34: ...24 IF2 Network Reader User Guide ...
Page 52: ...42 IF2 Network Reader User Guide ...
Page 75: ......
