Figure 3. 2-Position Power Screw Terminal Connector
1
2
3
1. V (Positive) Terminal Screw
2. C (Negative) Terminal Screw
3. Connector Screws
Caution
Do not tighten or loosen the terminal screws on the power connector
while the power is on.
3.
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.
4.
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.
5.
Install the power connector plug into the SYSTEM power receptacle on the IC-3121
chassis and tighten the connector screws to 0.4 N · m (3.5 lb · in.) of torque.
6.
Turn on the external power source.
Connecting the Isolated Outputs Power Supply
NI recommends the following power supply for the IC-3121.
Power Supply
Part Number
NI PS-15 Industrial Power Supply
781093-01
Complete the following steps to supply power to the isolated outputs.
1.
Verify the power source is turned off.
2.
If the power connector plug is connected to the chassis, disconnect it from the device.
IC-3121 Getting Started Guide
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© National Instruments
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