Powered Input Example; Isolated Input Interface Example; Open Collector Input Interface Example - Honeywell IF1C User Manual

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 reader +Input pin and the other side of the switch to one of the +5Vdc
sources.
+5 V
+Input
- Input
Ground
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.
+Input
-Input
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.
30
External
input
switch
External
input
switch
-
+
4.5 to 28 VDC
Twisted
pair
IF1C Fixed RFID Reader User Guide