NI Smart Camera I/O Accessory User Guide 6 ni.com
2. Wire the voltage output of the 24 VDC +20%/–15% (IEC 1311) power supply to the main voltage
input on the two-position connector as shown in Figure3. Insert a small flathead screwdriver into
the square opening. Using the screwdriver as a lever to open the clamp, insert the wire into the
spring terminal opening. Remove the screwdriver to securely clamp the wire.
Figure 3. Power Two-Position Header Wiring Diagram
3. Wire the common signal (ground) output of the power supply to the COM signal input on the
two-position connector, shown in Figure3, using the same technique described in step 2.
Additional power two-position header connectors (part number 734-102) can be ordered from Wago at
www.wago.com.
Fuses
The NI Smart Camera I/O Accessory has four replaceable fuses. Refer to Figure1 for the fuse locations.
• The power fuse (2 A), protects the NISmart Camera from overcurrent through the +24 VDC
connectors.
• The other three fuses (200 mA), protect the smart camera from overcurrent through isolated
output0, isolated output 1, or protect the computer from overcurrent through the ground on the
RS-232 connector.

Testing Fuses

You can check the continuity of the fuse with a handheld DMM. To do this, you must remove the side
panel, as described in steps1 through 4 of the Replacing Fuses section.
+24 VDC
COM