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30 IBM System Storage DCS9550 1S1 Storage Expansion Unit Installation, Service, and User Guide
).
4 Remove the key.
De-activation is the reverse of this procedure. To deactivate, rotate the key in an anti-
clockwise direction until the indicator is no longer visible in the aperture beside the key.
Note A drive carrier cannot be installed if its anti-tamper lock is activated
outside the enclosure.
2.11 Power Cord Connection
2.11.1 Parts Check List
• Power cord to requisite local standards
2.11.2 Procedure
1 Attach the power cord to the Power Supply/Cooling Modules.
2 Attach the power cord to the in-line IEC connector in this cord.
3 Switch on each Power Supply/Cooling Module. The PSU Good and AC Fail LEDs on the PSU
indicate whether AC mains power is present.
Caution The power connections must always be disconnected prior to removal of
the Power Supply/Cooling module from the enclosure.
Figure 2–13 Activating the Anti-tamper Lock