Allied Telesis AT-9900s Switches - Manual (Page 5)

Installation Guide
5
The following items are included with PSUs purchased separately:
■ one AC power cord (AC model)
■ one power cord retaining clip (AC model)
■ one Installation Guide
■ one warranty card
The following items are included with each FOM purchased separately:
■ one Installation Guide
■ one warranty card
Installing a Power Supply Unit
Warning All AC and DC versions of this equipment must be earthed.
You cannot install an AC PSU and a DC PSU in the same switch chassis.
If you remove a PSU or FOM from the switch, ensure that you replace it to
prevent dust and debris from entering the chassis and to maintain proper airflow
in the switch.
AC power supply unit specifications
Important information for service personnel:
■ CAUTION: double pole/neutral fusing
■ the rating of fuses FH101 and FH102 is 250 V, 5 A (AT-PWR01 only)
DC supply cable and power supply 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
■ a 15 Amp certified/listed circuit breaker is required for circuit protection