Allied Telesis Removable Power Supply and Fan - Manual (Page 10)

Installation Guide
9
Connecting an AC power supply
Follow these instructions to connect an AT-PWR01, AT-PWR02, or AT-PWR05
AC PSU to an AC power supply:
Warning The AT-PWR01 AC PSU has a fuse rating of 250V, 5A for FH101 and
FH102.
Warning The AT-PWR01 AC PSU has double pole/neutral fusing. Electric
shock is possible since there are dual primary fuses, one on the phase circuit and
one on the neutral circuit. If the neutral opens, the phase may still be live.
Warning When x900-24 units are connected with VCS stacking cables (XEM-
STK-CBL) ensure that all the PSUs are appropriately grounded. This is to avoid
large circulating ground currents that could damage the stacking cables. To
achieve this ensure that:
■ AT-PWR01 AC is grounded by the 3-pin AC power connector
■ All grounding points are at the same ground level. That is, all power
connectors share a common power distribution unit.
Warning For x900-24 models, when using an AT-PWR01 AC power supply and
an AT-PWR01 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-PWR01 AC only, and leave
the AT-PWR01 DC power connector ungrounded. In this case, as a safety
precaution, ensure that the rack is also grounded.
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.
Warning For SwitchBlade x908 AC models, the grounding stud on the rear of
the device is provided for situations where an additional ground is required. The
device must be powered from a grounded 3 wire AC source via the AC power
cable and connector.