Chapter 2
LEDs, DIP Switches, and Connectors
©
National Instruments Corporation
2-7
NI CVS-1450 Series User Manual
Figure 2-4 shows the power connector on the NI CVS-1450 device.
Table 2-2 lists and describes each terminal on the power connector.
Figure 2-4.
Power Connector
Earth Ground Connection
Some system setups may require using the grounding lug on the
NI CVS-1450 device to connect the chassis to earth ground. Connecting
the grounding lug, shown in Figure 2-5, to earth ground connects the
common-mode signal of the main power to earth ground through the
NI CVS-1450 device chassis.
Note
An earth ground connection does
not
connect C
iso
to earth ground.
Table 2-2.
Power Connector Terminals
Terminal
Description
V
Main power (24 VDC ±10%)
C
Common-mode signal
V
iso
Isolated power (5 to 30 VDC)
C
iso
Isolated common-mode signal
V
iso
(5-30 VDC)
C
C
iso
POWER
V
(24 VDC ±10%)
Viso
(5-30 VDC)
C
V
(24 VDC ±10%)
Ciso
POWER
