Wiring Instructions For A DC Power Supply
Your system supports up to two –(48–60) V DC power supplies (when available).
WARNING: For equipment using –(48–60) V DC power supplies, 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)
Required Tools
Wire-stripper pliers capable of removing insulation from size 10 AWG solid or stranded, insulated copper wire
NOTE: Use alpha wire part number 3080 or equivalent (65/30 stranding)
Required Wires
• One UL 10 AWG, 2 m maximum (stranded) black wire [–(48–60) V DC]
• One UL 10 AWG, 2 m maximum (stranded) red wire (V DC return)
• One UL 10 AWG, 2 m maximum green/yellow, green with a yellow stripe, stranded wire (safety ground)
Assembling And Connecting The Safety Ground Wire
WARNING: For equipment using –(48–60) V DC power supplies, 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.
1. Strip the insulation from the end of the green/yellow wire, exposing approximately 4.5 mm (0.175 inch) of copper
wire.
2. Using a hand-crimping tool (Tyco Electronics, 58433-3 or equivalent), crimp the ring-tongue terminal (Jeeson
Terminals Inc., R5-4SA or equivalent) to the green/yellow wire (safety ground wire).
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