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3.3 Isolated Digital I/O Connections
3.3.1 Dry/Wet Contact Support for Digital Input
Each digital input channel accepts either dry contact or 0 ~ 5 VDC wet
contact inputs. Dry contact capability allows the channel to respond to
changes in external circuitry (e.g., the closing of a switch in the external
circuitry) when no voltage is present in the external circuit. Figure 3-1
shows external circuitry with both wet and dry contact components, con-
nected as an input source to one of the card's digital input channels.
Figure 3.2: Isolated Digital Input Connections
USB-4750 User Manual
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Содержание USB-4750
Страница 3: ...USB 4750 32 Channel Isolated Digital I O USB Data Acquisition Module User Manual...
Страница 5: ...USB 4750 User Manual vi...
Страница 6: ...1 2 Introduction Sections include Hardware Features Software Overview...
Страница 9: ...USB 4750 User Manual 4...
Страница 10: ...2 2 Installation Sections include Unpacking Driver Installation Hardware Installation Hardware Uninstallation...
Страница 16: ...3 2 Signal Connections Sections include Overview Isolated Digital I O Connections Field Wiring Considerations...
Страница 22: ...A 2 Specifications...