Cisco Asr-920-24Sz-Im, Asr-920-24Sz-M, Asr-920-24Tz-M Aggregation Services Router Hardware Installation - Cisco ASR-920-24SZ-IM Hardware Installation Manual

Preparing for Installation
To prevent personal injury or damage to the chassis, never attempt to lift or tilt the chassis using the
Warning
handles on modules (such as power supplies, fans, or cards); these types of handles are not designed to
support the weight of the unit. Statement 1032
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
Warning When installing or replacing the unit, the ground connection must always be made first and disconnected
last. Statement 1046
Warning This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the
absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority
or an electrician if you are uncertain that suitable grounding is available. Statement 1024
Installation of the equipment must comply with local and national electrical codes. Statement 1074
Warning
Warning Hazardous voltage or energy may be present on power terminals. Always replace cover when terminals
are not in service. Be sure uninsulated conductors are not accessible when cover is in place. Statement
1086
To see the safety with electricity, see the Regulatory Compliance and Safety Information for the Cisco ASR
920 Series Aggregation Services Router document.
When working on equipment powered by electricity, follow these guidelines:
• Locate the room's emergency power-off switch. If an electrical accident occurs, you will be able to
quickly turn off the power.
• Before starting work on the system, turn off the DC main circuit breaker and disconnect the power
terminal block cable.
• Before doing the following, disconnect all power:
• Never install equipment that appears damaged.
• Carefully examine your work area for possible hazards, such as moist floors, ungrounded power extension
cables, and missing safety grounds.
• Never assume that power is disconnected from a circuit; always check.
◦ Working on or near power supplies
◦ Installing or removing a router chassis or network processor module
◦ Performing most hardware upgrades

Cisco ASR-920-24SZ-IM, ASR-920-24SZ-M, ASR-920-24TZ-M Aggregation Services Router Hardware Installation

Safety with Electricity
Guide
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