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Installation
Warning: Always install an isolator pad between the frame and ground. Frames are
shipped with isolator pads to completely isolate the frames from ground.
Warning: Application servers. Verify that all breakers are set to the OFF (O) position.
An application server chassis is redundantly powered from both A and B -48VDC buses.
Ensure that both the circuit breaker supplying A power to the chassis and the circuit
breaker supplying B power to the chassis are turned OFF by measuring the voltage with
a VOM on the cable that connects the chassis to its breakers. Both A and B power LEDs
on the front panel of the chassis should be OFF.
Caution: Redundant systems allow service during normal maintenance. When repairs
require a total power disconnect, both input supply sources must be disconnected. This
causes service interruption and takes down the systems.
Caution: This equipment has a connection between the earthed conductor of the DC
supply circuit and the earthing conductor.
Caution: Install equipment in restricted access areas in accordance with articles 110-16,
110-17, and 110-18 of the National Electric Code, ANSI/NFPA 70.
Caution: Incorporate a readily accessible approved disconnect device in the field wiring.
Caution: Use only listed closed-loop connectors for connection to the power supply.
Electrostatic Discharge
Danger: Always wear a wrist strap or other electrostatic protection when handling
printed circuit cards and other electrostatic-sensitive devices
Warning: Use an antistatic wrist strap connected to the wrist strap grounding point on
the frame when performing these procedures.
Warning: Do not use tie wraps on or above the top traverse arms on a frame. Always
trim tie wrap flush and turn the trimmed tie wrap to the rear of the cable. Contact the
Site Supervisor for site-specific customer information.
910-5681-001 Revision E, February 2014
Safety and Pre-Installation Requirements
24
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