Intermec IF30

Chapter 5 — Using the IF30 GPIO Interfaces
IF30 Fixed Reader User’s Manual 75
Using the Output Interfaces
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.
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.
GPIO Output Specifications
Signal Description Min. Typical Max.
Leakage
current
(High)
Switch output,
high leakage
current
0 mA 1 mA 10 mA
V
sat
(Low) Switch output on,
saturation voltage
with .25A load
0V 1V 1.5V