Considerations When Connecting The Digital I/O; Wiring An Isolated Input To A Sourcing Output Device; Wiring An Isolated Output To An External Load - National Instruments NI Vision CVS-1450 Series User Manual

Chapter 4 Digital I/O Functionality

Considerations When Connecting the Digital I/O

Wiring an Isolated Input to a Sourcing Output Device

Do not apply a voltage greater than 30 VDC to the isolated inputs. Doing so could
Caution
damage CVS-1450 device.

Wiring an Isolated Output to an External Load

Caution Do not draw more than 100 mA from 24 V or 30 V isolated outputs. Do not draw
more than 50 mA from 5 V isolated outputs.
NI CVS-1450 Series User Manual
The isolated trigger inputs on the CVS-1450 device are current sinking
and optically isolated. Figure 4-6 shows the trigger input interface circuit.
You can wire an isolated input to a sourcing output device, as shown in the
example in Figure 4-5. Refer to Appendix B, Specifications, for switching
thresholds and current requirements.
Sourcing
Output
Device
Figure 4-5. Example of Connecting an Isolated Input to a Sourcing Output Device
The digital output circuit sources current to external loads, as shown in
the example in Figure 4-6.
Viso
Input
Current
Limiter
Ciso
CVS-1450 device
4-12
Vcc
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