Installation guide

C-5
Catalyst 3550 Multilayer Switch Hardware Installation Guide
78-11358-06
Appendix C DC Power Connections
Connecting to DC Power
Wiring the DC-Input Power Source
Warning Only trained and qualified personnel should be allowed to install or replace this
equipment.
Warning Before performing any of the following procedures, ensure that power is
removed from the DC circuit.
Caution You must connect the Catalyst 3550-24-DC switch only to a 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.
Caution The switch must be installed with 5 A-branch-circuit protection.
Note This installation must comply with all applicable codes.