x900 Series Switch and SwitchBlade® x908
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1. Plug the AC power cord that is provided into the power inlet on the PSU.
2. Connect the power cord to the main power source.
3. On the AT-PWR05, set the Run/Standby switch to Run.
4. Check that the PSU LED on the front panel of the switch is lit green. If the
LED does not light, refer to the Hardware Reference for troubleshooting
information.
Connecting a DC power supply
Follow these instructions to connect an AT-PWR01 or 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.
Warni ng In order to avoid damaging the PSU, make sure that the PSU terminals
are wired to the correct polarity.
Warni ng 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 DC is grounded at the GND terminal. In order to avoid
large circulating ground currents, the wires of each grounding cable
must be 18AWG or thicker.
• All grounding points are at the same ground level. That is, all power
connectors share a common power distribution unit.
Warni ng When mounting one or two AT-PWR01 DC PSUs to a grounded rack,
ensure that the ground level of the rack and the DC power connector are the
same.
Warni ng 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.