Allied Telesis Removable Power Supply and Fan - Manual (Page 14)

Installation Guide
13
• All grounding points are at the same ground level. That is, all power
connectors share a common power distribution unit.
Warning 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.
4. Connect the positive feed to the + (positive) terminal and the negative feed
to the - (negative) terminal. Tighten the terminals to between 2.4 and
4.0 Nm (21.3 and 35.4 lbf in).
Note that the DC return input terminal must be connected as an Isolated
DC return (DC-I).
Warning In order to avoid damaging the PSU, make sure that the PSU terminals
are wired to the correct polarity.
5. Ensure that there are no exposed cable strands.
6. Replace the cover. You must replace the transparent plastic terminal cover
before continuing.
7. Secure the supply cable to the rack framework or a similar object to ensure
that connections are isolated from any force applied to the cable.
8. Ensure that the circuit breaker for the supply circuit and the Run/Standby
switch on the PSU are off. Press and release the Run/Standby switch so that
it is not pushed in (which is the Off position).
9. Connect the supply cable wires to the circuit breaker.
10. Turn on the PSU by pushing in the Run/Standby switch.
11. Confirm that the switch is receiving power.
Check that at least one of the PSU LEDs on the front panel of the switch is
lit green. If no LEDs light, refer to the Hardware Reference for
troubleshooting information.