Owners Manual

PSU is discovered and enabled before you remove the other PSU. The PSU status indicator turns green to signify
that the PSU is functioning properly.
Figure 48. Installing an AC PSU
1. release latch 2. PSU cable connector
3. PSU 4. power connector
5. PSU handle
Related References
Safety instructions on page 46
Wiring instructions for a DC power supply unit
Your system supports up to two –(48–60) V DC power supply units (PSUs).
NOTE:
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)
Kit contents
• Dell part number 6RYJ9 terminal block or equivalent (1)
• #6-32 nut equipped with lock washer (1)
Installing and removing system components
103