Figure 53. Installing an AC PSU
1.
release latch
2. PSU cable connector
3. PSU
4. power connector
5. PSU handle
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Wiring instructions for a DC power supply unit
Your system supports up to two –(48–60) V DC power supply units (PSUs).
WARNING: For equipment using –(48–60) V DC power supply units (PSUs), a qualified electrician
must perform all connections to DC power and to safety grounds. Do not attempt connecting to
DC power or installing grounds yourself. All electrical wiring must comply with applicable local
or national codes and practices. Damage due to servicing that is not authorized by Dell is not
covered by your warranty. Read and follow all safety instructions that came with the product.
CAUTION: Wire the unit with copper only, unless otherwise specified, use only 10 American Wire
Gauge (AWG) wire rated minimum 90 ºC for source and return. Protect the –(48–60) V DC (1
wire) with a branch circuit over-current protection rated 50 A for DC with a high interrupt
current rating.
CAUTION: Connect the equipment to a –(48–60) V DC supply source that is electrically isolated
from the AC source (reliably grounded –(48–60) V DC SELV source). Ensure that the –(48–60) V
DC source is efficiently secured to earth (ground).
NOTE: A readily accessible disconnect device that is suitably approved and rated shall be
incorporated in the field wiring.
Input requirements
• Supply voltage: –(48–60) V DC
• Current consumption: 32 A (maximum)
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