Chapter 4
Signal Connections
©
National Instruments Corporation
4-19
Figure 4-14.
Limit, Home, Inhibit-In (Alarm), In-Position, and General-Purpose Input
Circuit Connected to a Sinking Output Device
Figure 4-15.
Limit, Home, Inhibit-In (Alarm), In-Position, and General-Purpose Input
Circuit Connected to a High-Side Switch
Optocoupler
V
cc
R
LIMIT
PCI-7390
V+
Out
Axis <1..4> Input
Axis <1..4> VI_COM
NPN (Sinking)
Output Device
V–
Isolated
Ground
+24 V
Optocoupler
V
cc
R
LIMIT
PCI-7390
Axis <1..4> Input
Axis <1..4> VI_COM
Isolated
Ground
+24 V
High-Side
Switch
