3-11
Catalyst 3750-X and 3560-X Switch Hardware Installation Guide
OL-19593-01
Chapter 3 Power Supply and Fan Module Installation
Installing a DC Power Supply
Figure 3-11 Inserting the DC Power Supply in the Switch
Step 6 Connect the input power as described in the “Wiring the DC Input Power Source” section.
Wiring the DC Input Power Source
Step 1 Using a wire-stripping tool, strip each of the four wires from the DC-input power source to the
appropriate length for the terminals.
Warning
Use copper conductors only.
Statement 1025
Step 2 Using a Panduit crimping tool, crimp the fork-type terminals to the copper conductor, 90C, 14-AWG DC
power input wires.
Step 3 Connect the DC-input power terminals to the terminal blocks. See Figure 3-12 or Figure 3-13. 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 3-12 DC Source A Isolated From Source B with No Common Ground
RES
ET
CON
SOLE
STACK 1
STACK 2
A
U
X
A
C
OK
C
3K
X
-P
WR-4
4
0WDC
PS
OK
S-PWR
XPS
S
-
PW
R
253211
AC OK
C
3K
X
-P
WR-4
4
0WDC
PS
OK
253447
+
B-
B+
-
-
A+
A-
+
