Wiring The Dc-Input Power Source - Cisco WS-C2950T-48-SI Hardware Installation Manual

Wiring the DC-Input Power Source

Figure C-3
Wiring the DC-Input Power Source
Only trained and qualified personnel should be allowed to install or replace this equipment.
Warning
Statement 1030
Warning Before connecting or disconnecting ground or power wires to the chassis, ensure that power is
removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel
board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch
handle of the circuit breaker in the OFF position. Use a voltmeter to test for 0 (zero) voltage at the
power terminals on the chassis. Statement 196
You must connect the Catalyst 2950G-24-EI-DC or Catalyst 2950ST-24 LRE 997 switch only to a
Caution
DC-input power source that has an input supply voltage from –36 to –72 VDC. If the supply voltage is
not in this range, the switch might not operate properly or might be damaged.
The switch must be installed with 5-A-branch-circuit protection.
Caution
This installation must comply with all applicable codes.
Note
Catalyst 2950 Switch Hardware Installation Guide
C-4
Torquing Ground-Lug Screws
36 - 72 V
DC IN PU
1 - 0.5 A
T FO R RE
PO W ER M OT E
SU PP LY
SP EC IF
A IE D IN M
AN UA L.
+1 2V @
4. 5A
B
CO NS OL
E
Torque to 15 lbf-in.
Appendix C Connecting to DC Power
OL-6156-01