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NI CVS-1458 Getting Started Guide
3. If the power connector plug is connected to the chassis, disconnect it from the device.
Figure 4 shows the terminal screws, which secure the wires in the screw terminals, and the
connector screws, which secure the connector plug on the chassis.
Figure 4.
2 Position 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 power source to the V terminal of the power connector plug
and tighten the terminal screw to 0.2 to 0.25 N · m (1.8 to 2.2 lb · in.) of torque.
5. Connect the negative lead of the power source to the C terminal of the power connector plug
and tighten the terminal screw to 0.2 to 0.25 N · m (1.8 to 2.2 lb · in.) of torque.
6. Install the power connector plug into the SYSTEM power receptacle on the NI CVS-1458
chassis and tighten the connector screws to 0.4 N · m (3.5 lb · in.) of torque.
7. Turn on the external power source. Verify the PWR/FAULT LED is lit green.
Connecting the Isolated Outputs Power Supply and
PoE Power Supply
Complete the following steps to supply power to the PoE ports and the isolated outputs.
1. Make sure the power source is turned off.
2. Install one ferrite across the negative and positive leads of the power sources,
approximately 50 to 75 mm (2 to 3 in.) from the end of the power input wires. If you are
using an isolated output power supply and a PoE power supply, wrap the wires for both
power supplies through the same ferrite, as shown in Figure 5.
Figure 5.
Installing a Ferrite on the Power Leads
1
V (Positive) Terminal Screw
2
C (Negative) Terminal Screw
3
Connector Screws
1
2
3
