Install guide

12 AT-9900 Series Switch
Apply power to the switch
At the rear of the switch are two power supply bays. Your switch comes
pre-installed with one power supply unit (PSU) and either one fan only module
(FOM) or one blanking panel over a power supply bay, depending on the switch
model.
AC power supply unit specifications
Important information for service personnel:
■ CAUTION: double pole/neutral fusing
■ The ratings of fuses FH101 and FH102 is 250 V, 5 A
DC supply cable and power supply specifications
DC supply cable specifications:
■ Three-core cable is required
■ Minimum core size: 3.3 mm
2
(12 AWG) high strand count copper wire
■ Minimum cable rating: 600 V, 90 degrees Celsius
DC power supply specifications:
■ 40 to 60 V, 48 V nominal
■ Supports either positive grounded or negative grounded operation
For circuit protection a 15 Amp certified/Listed circuit breaker is required.
How to apply power to an AC power supply unit
To apply power to the PSU, plug the provided AC power cord into the power
inlet on the faceplate of the PSU and connect the power cord to the main power
supply.
How to apply power to a DC power supply unit
Warning Only trained and qualified personnel should connect a DC power
supply.
Warning For centralized DC power connection, the switch should be installed
only in Restricted Access Areas (Dedicated Equipment Rooms, Equipment
Closets, or the like) in accordance with Articles 110-16, 110-17, and 110-18 of
the National Electrical Code, ANSI/NAPA 70.
Warning Ensure that the supply cable is not live.
9900qig.fm Page 12 Thursday, September 2, 2004 9:41 AM