Multilayer Switch User Manual

C-4
Catalyst 3550 Multilayer Switch Hardware Installation Guide
OL-6155-01
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, replace, or service this equipment.
Statement 1030
Warning Before performing any of the following procedures, ensure that power is removed from the DC circuit.
Statement 1003
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.
To wire the switch to a DC-input power source, follow these steps:
Step 1 Locate and remove the terminal block plug (see Figure C-4).
Figure C-4 Terminal Block Plug
60530