Using The Output Interfaces - Intermec IF30 User Manual

Using the Output Interfaces

IF30 Fixed Reader User's Manual
Each IF30 output interface is optically isolated, polarized, and
rated for 5 to 48 VDC at 0.25A. All IF30 outputs include
internal thermal fuses that trip if the load exceeds 0.25A, and the
fuses are self-recovering once the excessive load is removed. The
high and low contacts are exposed and isolated from the ground.
Transient suppression limits output voltage spikes to 65 VDC.
GPIO Output Specifications
Signal Description
Leakage Switch output,
current high leakage
(High) current
V (Low) Switch output on,
sat
saturation voltage
with .25A load
Since the outputs are optically isolated, each of the outputs can
be configured to switch the high or low side of the load. You can
power the load directly from the IF30 or from an external power
supply.
In a typical application, the outputs control indicator lamps that
signal good reads or errors. These are the basic methods for
connecting external devices to the GPIO outputs:
• Switching the high side, with the load powered by the IF30.
• Switching the low side, with the load powered by the IF30.
• Switching the high side, with the load powered externally.
• Driving a DC relay that controls an AC load.
Chapter 5 — Using the IF30 GPIO Interfaces
Min. Typical
0 mA 1 mA
0V 1V
Max.
10 mA
1.5V
75