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2 • Hardware installation Model 3120 RAS Getting Started Guide
22 Cable installation
2. Rotate the power cable retainer clip so it secures the power cable plug in the IEC-320 connector as shown
in figure 6.
Figure 6. Power cable retainer clip
3. Repeat steps 1 and 2 to install the remaining power cable.
Installing the power cables—DC Power Supply
This section describes configuring the RAS to use DC power. Do not connect the remaining end of the power
cables to the DC power source.
Figure 7. DC connector, - DC and + DC Input view
1. Connect the earth ground of the DC source to the grounding stud on the RAS as described in the follow-
ing section “Grounding the Model 3120—AC and DC Power Supplies”.
2. Remove approximately 1/4-inch of insulation from the end of each wire.
Use copper conductors between 12 –18 AWG only.