Figure 13.
Wiring an Isolated Output to a Sinking Input
2 k
Ω
0.5 W
External
Power Supply
Sinking Input
Device
ISC-178x
Iso Out
C
Out
+
–
Note
A different pull-up resistor may be used, as long as the isolated output sink
current specification is not exceeded, the sinking input device specifications are met,
and the resistor is appropriately rated for the expected power dissipation. Refer to
the documentation for the sinking input device for additional requirements.
Related Information
on page 16
Wiring an Isolated Output to a Sourcing Input
The following figure shows how to wire an isolated output to a sourcing input.
Figure 14.
Wiring an Isolated Output to a Sourcing Input
External
Power Supply
ISC-178x
Iso Out
C
Out
+
–
Sourcing Input
Device
Note
Choose a resistor value that does not exceed the output sink current
specification of the isolated output. The value of the resistor depends on the current-
limiting characteristics of the sourcing input device. A resistor may not be needed if
the current is sufficiently limited by the input device.
Related Information
on page 16
ISC-178x User Manual
|
© National Instruments
|
15
Содержание ISC-1783
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