Allied Telesis Removable Power Supply and Fan - Manual (Page 17)

Removable Power Supply and Fan
16
Connecting a PWR05 DC power supply
Follow these instructions to connect an AT-PWR05 DC PSU to a DC power
supply. 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.
Warning When mounting one or two AT-PWR05 DC PSUs to a grounded rack,
ensure that the ground level of the rack and the DC power connector are the
same .
Warning For SwitchBlade x908 models, when using an AT-PWR05 AC power
supply and an AT-PWR05 DC power supply in the same switch, then the ground-
terminal of the DC power connector must be connected to the same ground as
the AC ground pin of the AC power connector.
If this is not possible, then you must ground the AT-PWR05 AC only, and leave
the AT-PWR05 DC power connector ungrounded. In this case, as a safety
precaution, ensure that the rack is also grounded.
Power supply specifications:
■ 40 to 60V DC, 48V nominal
■ supports either positive grounded or negative grounded operation
■ a 30Amp certified/listed circuit breaker is required for circuit protection
Warning Always use the cable supplied.