Справочник Пользователя для National Instruments NI PCIe-8255R

Complete the following steps to connect power for the isolated outputs to 
the NI 8255R.

Do not connect the NI 8255R isolated power to a source less than 5 VDC or 

greater than 30 VDC. Doing so could damage the NI 8255R device.

1.

Complete this step if you are using the NI desktop power supply 
(part number 778794-01). If you are using a power supply other than 
the NI desktop power supply skip this step and proceed to step 2.

a.

Disconnect the 4-position power connector from the power 
supply, as shown in Figure 3.

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

1

4-Position Power Connector

2

V Position

3

C Position

4

Power Supply Wire

2

3

4

1