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National Instruments Corporation
7
Getting Started with the NI PCIe-8255R
Figure 3.
Removing the 4-Position Power Connector from the Power Supply
b.
Depending on your connection method, reconnect the V
iso
and C
iso
wires to one of the
following options:
•
V
iso
and C
iso
on the 44-pin D-SUB
•
V
iso
and C
iso
on the DIN rail terminal block
•
V
iso
and C
iso
on the NI Vision I/O Terminal Block and Prototyping Accessory
Refer to Table 1 for a summary of the isolated power supply connections.
.
2.
Complete this step if you are using a power supply other than the NI desktop power supply. If you
are using the NI desktop power supply, skip this step and proceed to step 3.
a.
Wire the voltage output and the common-mode (ground) output of the isolated power supply
to one of the following options:
•
V
iso
and C
iso
on the 37-pin terminal block
•
V
iso
and C
iso
on the 44-pin D-SUB
•
V
iso
and C
iso
on the NI Vision I/O Terminal Block and Prototyping Accessory
Refer to Table 1 for a summary of the isolated power supply connections.
1
4-Position Power Connector
2
V Position
3
C Position
4
Power Supply Wire
Table 1.
Isolated Power Supply Connection Options
Connection Method
V
iso
C
iso
Custom cable
10, 25
14, 26, 29, 33, 36, 39, 42
44-pin D-SUB to 37-pin terminal block
17, 33
12, 16, 18, 28, 32, 34
44-pin D-SUB to 37-pin NI Vision I/O
Terminal Block
V
iso
terminal
C
iso
terminal
2
3
4
1
