6 1200-Watt DC-Input Power Supply Replacement Instructions
Installation Safety, ESD Precautions, and Tools Required
Safety with Electricity
You can remove or install a redundant (second) power supply without turning off the other supply.
Before removing a redundant power supply, ensure that the first supply is powered on to ensure
uninterrupted operation.
Follow these basic guidelines when working with any electrical equipment:
•
Before beginning any procedures requiring access to the chassis interior, locate the emergency
power-off switch for the room in which you are working.
•
Disconnect all power and external cables before moving a chassis.
•
Do not work alone if potentially hazardous conditions exist.
•
Never assume that power is disconnected from a circuit; always check.
•
Do not perform any action that creates a potential hazard to people or makes the equipment
unsafe.
•
Carefully examine your work area for possible hazards such as moist floors, ungrounded power
extension cables, and missing safety grounds.
In addition, use the guidelines that follow when working with any equipment that is connected to
telephone wiring or other network cabling.
Warning Warning
Do not work on the system or connect or disconnect cables during periods of
lightning activity. (To see translated versions of this warning, refer to page 16.)
•
Never install telephone jacks in wet locations unless the jack is specifically designed for wet
locations.
•
Never touch uninsulated telephone wires or terminals unless the telephone line is disconnected
at the network interface.
•
Use caution when installing or modifying telephone lines.
Warning Warning
Before opening the chassis, disconnect the telephone-network cables to avoid
contact with telephone-network voltages. (To see translated versions of this warning, refer to
page 17.)
Circuit Protection Requirements
Warning
This product relies on the building’s installation for short-circuit (overcurrent) protection.
Ensure that a fuse or circuit breaker no larger than 120 VAC, 50A U.S. (240 VAC, 30A international)
is used on the phase conductors (all current-carrying conductors). (To see translated versions of this
warning, refer to page 17.)
