Cisco Systems Catalyst 2955 manual 1058

Chapter 4 Installation in a Hazardous Environment

Verifying Switch Operation

Wiring the DC Power Source

Warning Only trained and qualified personnel should be allowed to install or replace this equipment. Statement 49

Warning In switch installations in a hazardous location, the DC power source could be located away from the vicinity of the switch. be sure that power is removed and power cannot be accidentally be turned on or the area is nonhazardous before proceeding. Statement 1059

Warning When you disconnect the power and relay connector with power applied to the switch, an electrical arc can occur. This could cause an explosion in hazardous area installations. Be sure that power is removed from the switch and cannot be accidentally be turned on, or verify that the area is nonhazardous before proceeding.

Failure to securely tighten the power and relay connector captive screws can result in an electrical arc if the connector is accidentally removed. Statement

1058

Warning Connect the unit only to DC power source that complies with the safety extra-low voltage (SELV) requirements in IEC 60950 based safety standards. Statement 1033

Caution The AC/DC power converter (PWR-2955-AC=) can only be used in a nonhazardous location installation.

Caution You must connect the Catalyst 2955 switch only to a DC-input power source that has an input supply voltage from 18 to 32 VDC. If the supply voltage is not in this range, the switch might not operate properly or might be damaged.

	Catalyst 2955 Hardware Installation Guide
78-14944-03		4-21