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Catalyst 3850 Switch Hardware Installation Guide
OL-26779-02
Chapter 4 Power Supply Installation
Finding the Power Supply Module Serial Number
Step 3 Connect the DC-input power terminals to the terminal blocks. See Figure 4-12 or Figure 4-13. Make sure
to match the polarity (negative to negative, positive to positive) when connecting the wires to the
terminal blocks. Connect the ground wire to a grounded metal rack or to earth ground if the switch is not
in a grounded rack.
Figure 4-12 DC Source A Isolated From Source B with No Common Ground
Figure 4-13 DC Source A and Source B Connections with Common Ground
Step 4
Torque all terminal block screws to 11 lbf-in.
Step 5 Replace the terminal block safety cover.
Step 6 Move the DC power source circuit-breakers to the ON position.
Step 7 Confirm that the power supply DC OK and PS OK LEDs are green. See Table 4-2 for a description of
the module LEDs.
Finding the Power Supply Module Serial Number
If you contact Cisco Technical Assistance regarding a power supply module, you need to know the serial
number. See Figure 4-14 to Figure 4-16 to find the serial number. You can also use the CLI to find out
the serial number.
253447
+
B-
B+
-
-
A+
A-
+
253446
+
B-
B+
-
-
A+
A-
+
