Output Interfaces; Switch The High Side With Reader Power - Honeywell IF1C User Manual

+5 V
+Input
- Input
Ground
Open Collector Input Interface

Output Interfaces

Each reader output interface is optically isolated from the reader, polarized, and
rated 5 to 24VDC at 5mA.
Signal
Leakage
current
(High)
V
Because the outputs are optically isolated, each one can be configured to switch
the high side or the low side of the load. You can power the load directly from the
reader 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:
•
•
•
•
These methods are shown in the following examples.

Switch the High Side with Reader Power

In this example, an external indicator lamp (0.25A maximum current) is connected
to the -Output and Ground pins, and the corresponding +Output pin is connected
to the +5VdC source.
IF1C Fixed RFID Reader User Guide
Description
Switch output, high leakage current
Switch output on, saturation voltage with 5mA
(Low)
sat
maximum current
Switching the high side, with the load powered by the reader
Switching the low side, with the load powered by the reader
Switching the high side, with the load powered externally
Driving a DC relay that controls an AC load
Min. Typic Max.
al
0mA 1mA 10mA
1V 1.5V
0 V
31