Cisco Systems Catalyst 3550 warranty Warning Statements for Connecting to DC Power

Warning	Installation of the equipment must comply with local and national electrical codes.
	Statement 1074

Warning Statements for Connecting to DC Power

These statements apply when connecting a Catalyst 3550-24-DC switch to DC power.

Warning

Warning

Warning

When installing the unit, always make the ground connection first and disconnect it last. Statement 42

An exposed wire lead from a DC-input power source can conduct harmful levels of electricity. Be sure that no exposed portion of the DC-input power source wire extends from the terminal block plug. Statement 122

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.

Statement 140

Caution

Caution

To make sure that the equipment is reliably connected to earth ground, follow the grounding procedure instructions, and use a UL-listed lug suitable for number-6 AWG wire and two number-10-32 ground-lug screws.

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.

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