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3. Connect one end of the black DC power cord marked with "–" to the RTN(+) terminal on the power
supply, install the flat washer, spring washer, and fasten the screw.
4. Connect one end of the blue DC power cord marked with "–" to the negative terminal (–) on the
power supply; connect the "–" end of the grounding cable to the terminal marked with PE on the
rightmost of the grounding strip.
Figure 45 Connecting the DC power cord to the grounding strip
5. Connect the other end of the DC power cord to the power source:
a. Connect the other end of the black DC power cord to the RTN (+) terminal that provides power
to the switch.
b. Connect the other end of the blue DC power cord to the negative terminal (–) that provides a
power supply to the switch.
c. Connect the other end of the grounding cable to a reliable grounding point.
6. Put the protection cover on the wiring terminals.
Figure 46 Installing the protection cover
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