Honeywell IF1C, Руководство пользователя

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IF1C
Fixed RFID Reader User Guide
Powered Input Example
The reader powered input the simplest way to connect a control to a reader input
interface. If the external control device is a switch, you can connect one side of the
switch to a Input pin and the other side of the switch to one of the +5Vdc
sources.
Reader Powered Input
Isolated Input Interface Example
Isolate the input interface to minimize noise induced by distance or grounding
characteristics. The isolated input avoids induced noise by referencing a remote
input to chassis return of the reader.
Isolated Input Interface
Open Collector Input Interface Example
The input can be connected to an open collector interface of an external device.
This open collector input interface typically implies that the grounds are tied
together for the two systems. The common ground can be a source of input noise,
so you should follow good grounding practices for both the reader and the input
device.
In this situation, the reader provides power to the pull-up resistor for the open col-
lector. Connect the +Input pin to the +5Vdc source.
External
input
switch
+Input
+5 V
Ground
- Input
+
-
External
input
switch
4.5
to 28 VDC
Twisted
pair
-Input
+Input