Juniper Networks T1600 - Manual (Page 17)

Upgrading the DC Power Supplies
NOTE: You must upgrade both power supplies. Follow these procedures for one
power supply, then immediately upgrade the other power supply. Mixing a two-input
160-A power supply and a three-input 240-A power supply is supported only during
the upgrade.
The power supplies are located at the lower rear of the chassis. Each power supply
is hot-insertable and hot-removable. When one power supply is powered down or
removed, the other power supply automatically assumes the entire electrical load
for the routing node. To upgrade each two-input 160-A power supply to a three-input
240-A power supply, use the following procedures:
■ Preparing the DC Power Cables on page 17
■ Tools and Parts Required on page 17
■ Removing a Two-Input 160-A Power Supply on page 18
■ Setting the Input Mode Switch on a Three-Input 240-A Power Supply on page 21
■ Installing a Three-Input 240-A Power Supply on page 22
■ Replacing the Cable Restraint on a Three-Input 240-A Power Supply on page 23
■ Connecting a Three-Input 240-A Power Supply on page 25
■ Powering On a Three-Input 240-A Power Supply on page 26
Preparing the DC Power Cables
The accessory box shipped with the installation kit includes the cable lugs that attach
to the terminal studs of each power supply (see Figure 25 on page 46).
CAUTION: Before the power supply installation begins, a licensed electrician must
attach cable lugs to the power cables that you supply. A cable with an incorrectly
attached lug can damage the power supply.
Tools and Parts Required
To upgrade the power supplies, you need the following tools and parts:
■ Four additional DC power cables (two cables for each power supply)
■ Electrostatic discharge (ESD) grounding wrist strap
■ 7/16-in. nut driver or pliers
Upgrading the DC Power Supplies ■ 17
Upgrading the DC Power Supplies