Using The Output Interfaces - Intermec IF5 User Manual

Using the Output Interfaces

IF5 Fixed Reader User's Manual
Each IF5 output interface is optically isolated from the IF5,
polarized, and rated for 5 to 48 VDC at 0.25A. All IF5 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 ground. Transient suppression limits output voltage spikes
to 65 VDC.
GPIO Output Specifications
Signal Description
Leakage Switch output, high
current leakage current
(High)
V (Low) Switch output on,
sat
saturation voltage with
.25A load
Because the outputs are optically isolated, each one can be
configured to switch the high side or the low side of the load. You
can power the load directly from the IF5 or from an external
power supply.
In a typical application, the outputs control indicator lamps that
signal good reads or errors. The basic methods for connecting
external devices to the GPIO outputs include:
• Switching the high side, with the load powered by the IF5
• Switching the low side, with the load powered by the IF5
• Switching the high side, with the load powered externally
• Driving a DC relay that controls an AC load
These methods are shown in the next examples.
Chapter 5 — Using the IF5 GPIO Interfaces
Min.
0 mA
0V
Typical Max.
1 mA 10 mA
1V 1.5V
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