National Instruments NI PCIe-8255R Quick Start Manual page 9

Connection Method
Custom cable
44-pin D-SUB to 37-pin terminal block
44-pin D-SUB to 37-pin NI Vision I/O
Terminal Block
© National Instruments Corporation
Refer to Table 1 for a summary of the isolated power supply
connections.
Table 1. Isolated Power Supply Connection Options
V
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 and C
iso
• V and C
iso
• V and C
iso
Prototyping Accessory
Refer to Table 1 for a summary of the isolated power supply
connections.
3. (Optional) To suppress electromagnetic interference, install a ferrite on
the power supply cable as close to the connection to the NI 8255R as
possible. Wrap the power supply cable around the ferrite two times, as
shown in Figures 4 and 5.
1 Power Supply Output Cable
Figure 4. Installing a Ferrite Connector on the Power Supply Cable
.
V
iso
10, 25 14, 26, 29, 33, 36, 39, 42
17, 33
terminal
iso
on the 37-pin terminal block
iso
on the 44-pin D-SUB
iso
on the NI Vision I/O Terminal Block and
iso
2
1
2 Ferrite
9
C
iso
12, 16, 18, 28, 32, 34
C terminal
iso
NI PCIe-8255R User Manual