Owners Manual

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)

Removing a DC power supply unit

Prerequisites

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: The system needs one power supply for normal operation. On power-redundant systems, remove and replace

only one power supply at a time in a system that is powered on.

NOTE: You may have to unlatch and lift the optional cable management arm if it interferes with power supply removal.

For information about the cable management arm, see the rack documentation of your system.

Steps

1. Disconnect the power wires from the power source and the connector from the PSU you intend to remove.

2. Disconnect the safety ground wire.

3. Press the release latch and slide the PSU out of the chassis by using the PSU handle.

Figure 49. Removing a DC PSU

release latch 2. power supply status indicator

3. PSU 4. power connector

5. PSU handle

104 Installing and removing system components