Dc And Ac Psus With Power Switch; Removing A Power Supply Unit - Seagate Dot Hill AssuredSAN 3000 Series Installation And Replacement Manual

DC and AC PSUs with power switch

DC and legacy AC power supplies — each equipped with a power switch — are shown below.
DC power supply unit
Powering off the PSU
1. Stop all I/O from hosts to the system (see
2. Use management software to shut down any other system components necessary.
3. If applicable, turn off the power switch on the PSU being replaced and on the replacement PSU.
Disconnecting an AC power cord
1. If applicable, verify that the power switch on the PSU being replaced is in the Off position.
2. Disconnect the power cord's male plug from the power source.
3. Disconnect the power cord's female plug from the power cord connector on the PSU.
NOTE: See Connecting a power cable
connection/disconnection.
Disconnecting a DC power cable
1. Verify that the power switch on the PSU being replaced is in the Off position.
2. Loosen the cable-locking screws that attach each D-shell connector to its power supply, and carefully
disconnect the lugs on each cable wire component of the DC power cable from the DC power source
(Figure 28
3. Loosen the cable-locking screws attaching the D-shell connector to the PSU, and disconnect the power
cable from the PSU.

Removing a power supply unit

1. If replacing a single power supply module via hot-swap, proceed to step3.
2. If replacing both power supply modules, verify that the enclosure is powered off.
If the PSU model has a power switch, verify that the switch is set to the Off position.
3. Verify that the power cord is disconnected.
4. Turn the thumbscrew at the top of the latch counterclockwise to loosen and disengage it from the
module; however, do not remove the thumbscrew from the latch.
5. Rotate the latch downward by approximately 45° supplying leverage to disconnect the module from the
internal connector.
See Figure 26
Figure 25 DC and AC PSUs with power switch
on page 45 shows cable wire lugs and D-shell connector).
on page 44.
Power
switch
Power
cable
connect
Legacy AC power supply unit
Stopping I/O on page 31).
for illustrations showing both AC and DC power cord
on page 45
AssuredSAN 3000 Series FRU Installation and Replacement Guide
Power
switch
Power
cord
connect
43