Intermec IF2 IF2 Network Reader User Manual - Page 101

Use the Output Interfaces

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+12 V +Input Chapter 6 - Use the IF2 GPIO Interfaces - Input Ground Open Collector Input Interface Use the Output Interfaces Each IF2 output interface is optically isolated from the IF2, polarized, and rated for 5 to 48 VDC at 0.25 A. All IF2 outputs include internal thermal fuses that trip if the load exceeds 0.25 A, 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 Min. Leakage Switch output, high leakage current (High) current Vsat (Low) Switch output on, saturation voltage with 0.25A load 0 mA 0V Typical Max. 1 mA 10 mA 1V 1.5V 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 IF2 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 IF2 • Switching the low side, with the load powered by the IF2 • Switching the high side, with the load powered externally • Driving a DC relay that controls an AC load IF2 Network Reader User Manual 87

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Chapter 6 — Use the IF2 GPIO Interfaces
IF2 Network Reader User Manual
87
Open Collector Input Interface
Use the Output Interfaces
Each IF2 output interface is optically isolated from the IF2, polarized,
and rated for 5 to 48 VDC at 0.25 A. All IF2 outputs include internal
thermal fuses that trip if the load exceeds 0.25 A, 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.
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 IF2 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 IF2
•
Switching the low side, with the load powered by the IF2
•
Switching the high side, with the load powered externally
•
Driving a DC relay that controls an AC load
+Input
+12 V
Ground
- Input
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 0.25A load
0V
1V
1.5V