IBM 8265 Nways ATM Switch, Product Description, Page: 62 / 100

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IBM 8250, 8260, and 8285: Planning and Site Preparation Guide
Power and Electrical Wiring Requirements
AC Power Supply
A dedicated 15 ampere circuit (or an equivalent method of providing this current) is
recommended to supply power to the switch when operated at voltage between 90
and 130 volts ac. This will ensure adequate power for a fully loaded switch
configuration. This circuit must be grounded to a safety protected ground (earth),
NOT to a neutral ground that carries current back to the transformer. Do not use an
electrical conduit pipe as your only means of grounding the switch. There must be
four ac power outlets available within 2 m (6 ft) of the 8265 in the event that there are
four power supplies installed in the switch.
DC Power Supply
To comply with the UL requirements, an 8265 equipped with a -48 Vdc power supply
must be installed in a rack or enclosed cabinet. Do not installed an 8265 with a -48
Vdc power supply on a table or shelf. The power cord must be routed through a
raceway up to the -48 Vdc distribution panel.
Connect the -48 Vdc power supply to Safety Extra Low Voltage only.
Power Requirements
The power source (wall outlet or receptacle) at the place you have chosen for the
8265 must provide the electrical specifications shown in Table 11 through Table 14 on
page 49 to ensure that the 8265 will not be damaged and will work satisfactorily.
Table 11. 8265 Operating Conditions
Phase Single phase + earth
Frequency
50 or 60 Hz
±
2%
110-Volt range
90 V ac (minimum), 132 V ac (maximum)
220-Volt range 180 V ac (minimum), 256 V ac (maximum)
-48 Vdc
-40 Vdc (minimum), -57 Vdc (maximum)
Table 12. Maximum Inrush Current per 415 W Power Supply
Model
8265-17S 20 A
Table 13. Site Power Requirement Recommendations
Model 90-256 V (47/63 Hz) -48 Vdc
8265-17S 2.2 kVA —