NI PCIe-8255R User Manual 8 ni.com
Wiring Isolated Output Power to the NI 8255RComplete the following steps to connect power for the isolated outputs to
the NI 8255R.
Caution 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 Figure3.
Figure 3. Removing the 4-Position Power Connector from the Power Supply
b. Depending on your connection method, reconnect the Viso and
Ciso wires to one of the following options:
•V
iso and Ciso on the 44-pin D-SUB
•V
iso and Ciso on the DIN rail terminal block
•V
iso and Ciso 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