Dell PowerEdge XR12 server Wiring Instructions

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Dell PowerEdge XR12 server Wiring Instructions | Manualzz

Cabling instructions for –(48–60) V

DC power supply

Notes, Cautions, and Warnings

NOTE: A NOTE indicates important information that helps you make better use of your product.

CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.

WARNING: A WARNING indicates a potential for property damage, personal injury, or death.

This document describes the requirements and power and safety ground cable wiring instructions for systems equipped with a –(48–60) V DC power supply.


This installation should only be done by a qualified licensed electrician.

Do not attempt to connect DC power or install safety grounds yourself. All electrical wiring must comply with applicable local or national codes and practices.

After the electrician completes the installation, the power supply input plug can be plugged and unplugged like a normal AC power cable. The DC power must be turned off before attempting to plug and unplug the input plug.

You should only perform troubleshooting and simple repairs as authorized in your product documentation, or as directed by the online or telephone service and support team. Damage due to servicing that is not authorized by Dell is not covered by your warranty. Read and follow the safety instructions that are shipped with your product.

Wire the unit with copper only (unless otherwise specified), 10 American Wire

Gauge (AWG) wire rated minimum 90°C in parallel for source and return.

Protect the –(48–60) V (1 wire) with a branch circuit overcurrent protection rated

30 A for DC with a high interrupt current rating.

Connect the equipment to a –(48–60) V DC SELV supply source that is electrically isolated from the AC source.

Ensure that the –(48–60) V DC source is efficiently secured to earth (ground).

A readily accessible disconnect device that is suitably approved and rated shall be incorporated in the field wiring.

© 2023 Dell Inc. or its subsidiaries.

PN: RMVNG 2023-01 A08


Input requirements:

Supply voltage : –(48–60) V DC

Current consumption : 27 A maximum

Kit contents : Plug with crimp terminals (1) – Dell Part # RN5T2

Required Tools:

• Philips P2 screwdriver

• M4 nut driver

• Stripping Pliers – capable of removing insulation from 10 AWG stranded insulated copper wire

• Crimping tool (YQK-70.DELIXI) or equivalent crimping tool capable of crimping a terminal to a 10 AWG wire

• Heat Gun or suitable tool to shrink Heat Shrink tubing

Required Materials:

• Heat Shrink tubing 3/8 inches (Shrink Ratio 2 to 1), 2 inches (50.8 mm) total minimum length 1 inch (25.4mm) per terminal)

• Wire: (Alpha wire part #3081 or equivalent 105/30 stranded wire)

• One UL 1015 10 AWG, 2 m maximum (stranded) black wire (–(48–60) V DC)

• One UL 1015 10 AWG, 2 m maximum (stranded) red wire (V DC return)

• One UL 1015 10 AWG, 2 m maximum green/yellow, green with a yellow stripe, stranded wire (safety ground)

• A Ring-tongue terminal of M4 Stud Size. Either a Straight or Right Angle ringtongue terminal can be used. The Installation Electrician should decide which is best for the safety ground installation.

1. Assembling and connecting the safety ground wire

NOTE: This product is intended to be used in CBN (Common Bonding Network) applications.

1. Strip the insulation from the end of the green/yellow wire, exposing approximately

4.5 mm (0.175 inches) of copper wire.

2. Using a hand-crimping tool, crimp the ring-tongue terminal of M4 stud size

(not supplied as part of the Kit) suitable for 10 AWG insulated copper wire to the green/yellow wire.

NOTE: Either a Straight or Right Angle ring-tongue terminal can be used. The

Installation Electrician should decide which is best for the safety ground installation.

3. Remove the M4 nut and associated hardware from grounding post/stud.

4. Connect the safety ground to the grounding post/stud on the PSU using the M4 nut,

Spring Washer and Locking/Star Washer.

Connection using Straight Type Ring-Tongue Terminal






Connection using Right Angled Type Ring-Tongue Terminal

1. Green/Yellow safety ground wire

3. Locking/star washer

5. M4 Nut



Grounding post/stud

Spring washer

NOTE: The system shown above is indicative only and may not match the actual system that you purchased.


2. Assembling the DC power cable

1. Cap on plug

3. Input plug

5. Heat shrink tubing




Screws on the plug

Crimp terminals

10 AWG red wire

7. 10 AWG black wire

To construct the DC input power cable, perform the following steps:

1. Strip the insulation from the ends of the DC power wires such that ends are exposed to match the crimp terminal.

2. Twist and reshape the exposed stranded wires.

3. Crimp 10 AWG black and 10 AWG red wires into crimp terminals using hand-crimping tool.

4. Insert suitable heat shrink tubing (not supplied as part of the kit) over each crimp terminal head so that it covers the length of the barrel and extend approximately about an inch on the wires.

5. Using a heat gun or suitable tool shrink the tubing so it sits snug on the barrel and wire.

6. Insert the black wire into input plug position marked –48 V. The crimp terminal must be properly oriented as shown in the image.

7. Insert the red wire into input plug position marked RTN. The crimp terminal must be properly oriented as shown in the image.

8. Secure both black and red wires into the input plug using the screws (use torque setting of 2.7Nm +/-5% (23.9 in-lbs +/-5%)) and insert the cap over the screws. The screw is intended to go through the hole in the crimp terminal. Ensure that the cap is inserted properly and the crimp terminal is secured with the screw by lightly tugging on the cables.


CAUTION: Damage can occur if the crimp terminals are not fully inserted into the plug before tightening the screws.

WARNING: Failure to follow the documented assembly instructions could result in potential property damage, personal injury or death.

3. Connecting the –(48–60) V DC power cable

1. To connect the –(48–60) V DC power cable, use the VELCRO


strap to loop the cables to the PSU handle.

2. Plug the –(48–60) V DC power supply unit into the system.

3. Insert DC cable assembly into PSU side connector and press the connector until it clicks in place.



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