© National Instruments
|
1-13
Caution
Do
not
connect V2 to a DC mains supply or to any supply requiring a
connecting cable longer than 3 m (10 ft). A DC mains supply is a local DC electricity
supply network in the infrastructure of a site or building.
Complete the following steps to connect a power source to the cDAQ controller.
1.
Make sure the power source is turned off.
2.
Install the ferrite shipped with the cDAQ controller across the negative and positive leads
of the power source, approximately 50 to 75 mm (2 to 3 in.) from the ends of the leads near
the cDAQ controller, as shown in Figure 1-7.
Figure 1-7.
Installing the Ferrite on the Power Leads
3.
Loosen the connector screw flanges and remove the power screw terminal connector plug
from the cDAQ controller. Figure 1-8 shows the terminal screws, which secure the wires in
the screw terminals, and the connector screw flanges, which secure the connector plug on
the front panel.
Figure 1-8.
Power Screw Terminal Connector Plug
Caution
Do
not
tighten or loosen the terminal screws on the power connector while
the power is on.
4.
Connect the positive lead of the primary power source to the V1 terminal of the power
connector plug and tighten the terminal screw.
5.
Connect the negative lead of the primary power source to one of the C terminals of the
power screw terminal connector plug and tighten the terminal screw.
6.
Optionally, you can connect the positive lead of a secondary power source to the V2
terminal and the negative lead to the other C terminal.
1
Terminal Screw
2
Connector Screw Flanges
1
1
2