CAUTION:
To reduce the risk of electric shock or energy hazards:
vThis equipment must be installed by trained service personnel in a
vConnect the equipment to a reliably grounded safety extra low voltage (SELV) source. An SELV source is a secondary circuit that is designed so that normal and single fault conditions do not cause the voltages to exceed a safe level (60 V direct current).
vThe branch circuit overcurrent protection must be rated 20 A.
vUse 12 American Wire Gauge (AWG) or 2.5 mm2 copper conductor only, not exceeding 4.5 meters in length.
vIncorporate a readily available approved and rated disconnect device in the field wiring.
CAUTION:
This unit has more than one power source. To remove all power from the unit, all dc MAINS must be disconnected.
CAUTION:
There is current to the power supply and fan units even though the power supply switch is in the OFF position. Use a disconnect device to shut power off before unplugging the dc power jumper cable from the dc power supply connectors.
There are two ways to cable the dc power supply and fan units:
v
v
Single-level redundant dc cabling
In a
112IBM System Storage DS4700 Express Storage Subsystem: Installation, User’s and Maintenance Guide
