Allied Telesis Rapier 48w Guía De Instalación Y Seguridad página 12

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Rapier 48w DC switch
Follow these instructions when connecting the DC switch variant. Read
on page 23 of this document before connecting a DC power supply.
Warning Only trained and qualified personnel should connect a DC power
supply.
For centralised DC power connection, the switch should be installed in
restricted access areas only (such as dedicated equipment rooms or
equipment closets) in accordance with Articles 110-16, 110-17, and 110-18 of
the National Electrical Code, ANSI/NFPA 70.
Damage to equipment may result if power is connected improperly.
Before working on equipment that is connected to power, remove jewellery
including rings, necklaces, and watches. Metal objects will heat up when
connected between power and ground, and can cause serious burns or weld the
metal object to the terminals.
NEBS preparation when rack-mounted
To ensure rack-mounted installations are earthed for compatibility with NEBS,
all bare conductors must be coated with an appropriate antioxidant compound
before making crimp connections.
DC supply cable and power supply
Supply cable specifications:
■ two-core cable is required
■ minimum core size: 2.1mm
■ minimum cable rating: 600 V, 90 degrees C
Power supply specifications:
■ 48 VDC (40 to 60 VDC is acceptable)
■ supports either positive grounded or negative grounded operation
■ a 15 Amp certified/listed circuit breaker is required for circuit protection
Installation and Safety Guide
2
(14 AWG)
"Safety"
11