To connect power to a DC-powered EX4650-48Y switch (see Figure 8):
Figure 8: Connecting Power to a EX4650 Switch Powered by DC Power Supply
The DC power supply has terminals labeled V-, V–, V+, and V+ for connecting DC power source cables labeled positive (+)
and negative (–).
WARNING: Ensure that the input circuit breaker is open so that the cable leads will not become active
while you are connecting DC power.
CAUTION: Ensure that you install the power supply first and then connect DC power source cables,
before closing input breaker ON.
1. Remove the terminal block cover. The terminal block cover is a piece of clear plastic that snaps into place over the
terminal block.
2. Remove the screws on the terminals by using the screwdriver. Save the screws.
3. Connect each power supply to a power source. Secure power source cables to the power supplies by screwing the
ring lugs attached to the cables to the appropriate terminals by using the screws from the terminals.
•
Secure the ring lug of the positive (+) DC power source cable to the V+ terminal on the DC power supply.
•
Secure the ring lug of the negative (–) DC power source cable to the V– terminal on the DC power supply.
•
Tighten the screws on the power supply terminals by using an appropriate screwdriver. Do not overtighten—apply
between 5 lb-in. (0.56 Nm) and 6 lb-in. (0.68 Nm) of torque to the screws.
4. Replace the terminal block cover.
5. Close the input circuit breaker.
6. Verify that the IN OK and the OUT OK LEDs on the power supply are lit green and on steadily. See Figure 9
9
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