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IF2 Network Reader User Guide 55
USE THE IF2 GPIO INTERFACES
This chapter explains how to access the IF2 general purpose input/output (GPIO)
interfaces and how to connect industrial controls such as motion sensors or indi-
cator lamps to the IF2. This chapter includes the following topics:
• About the GPIO Interfaces
• Access the Interfaces
• Use the Input Interfaces
• Use the Output Interfaces
• Use the Power Interface
About the GPIO Interfaces
The IF2 has four general purpose input and output (GPIO) interfaces. You connect
external controls such as motion sensors or indicator lamps to the GPIO interfaces,
which can then trigger IF2 operations.
Each interface is electrically isolated from the IF2 and designed for low voltage DC
loads. The IF2 can also supply 12 VDC at 0.5 A to external devices.
How the inputs and outputs are used depends on the RFID application software
being used in the system. You need to coordinate input and output control wiring
with the software developer.
If your application uses the IF2 GPIO interfaces to control external devices such as
indicator lamps, running the application on the IF2 may decrease response time
for those devices. For more information, see Chapter 4,
“Install Applications on the
IF2 with Expanded Memory Option.”
Access the Interfaces
You can access the GPIO interfaces through the IF2 GPIO port. The port uses a
standard 25-pin serial cable. For port pin assignments, see
"Port Pin
Assignments" on page 62 .