Chapter 5 — Using the IF61 GPIO Interfaces
IF61 Fixed Reader User’s Manual 115
Using the Input Interfaces
Each of the four inputs is compatible with input signals of 10 to
36 VDC. Both the high and low signal contacts are exposed and
isolated to 1500V. Input impedance is 1.8K minimum.
In a typical application, the IF61 senses input from an external
control like a switch and then starts a tag read operation.
There are three basic ways to connect input controls to the IF61
input interfaces:
• Supply the input interface with power from the IF61.
•Isolate the IF61 from the input power source.
• Use an open collector solid state drive from a remote device to
control the inputs.
For more information, see the next examples.
IF61 Powered Input
This is the simplest way to connect a control to an IF61 input
interface. If the external control device is a switch, you can
connect one side of the switch to an IF61 +Input pin, and the
other side of the switch to one of the +12 VDC sources. Ground
the corresponding -Input pin as shown in the next illustration.
IF61 Powered Input
GPIO Input Signal Descriptions
Signal Description Min. Typical Max.
V
in
(High) High input voltage 10V 24V 36V
V
in
(Low) Low input voltage -1V 0V 1V
External
input
switch
+Input
+12V
Ground
- Input
To Next Page
Loading...
