Cisco Systems 159330, 124792, 124778 manual System Upgrades, Small to Medium System Upgrade

Chapter 2 System Installation

2.6 System Upgrades

Step 8 Repeat for additional DC cabling.

2.6 System Upgrades

If the installation is an upgrade of a pre-existing system, the following sections give a list of the procedures needed to upgrade the system:

•2.6.1 GMT Fuses, page 2-28

•2.6.2 Small to Medium System Upgrade, page 2-28

•2.6.3 Medium to Large System Upgrade, page 2-29

•2.6.4 Small to Large System Upgrade, page 2-29

Review the following sections before attempting a system upgrade:

•2.1.1 Ground Symbol, page 2-1

•2.1.2 Tools Required, page 2-1

•2.1.4 Installation Materials, page 2-2

Note Some upgrade connections may require access to the rear of the system. If rear access is not available, all rear connections are required to have a service loop that allows the 1 RU Distribution Shelf to be pulled out (after unscrewing the cabinet/mounting screws) to allow for access. For information on removing the 1 RU Distribution Shelf see 3.2.1 Replace the 1 RU Distribution Shelf, page 3-1.

2.6.1 GMT Fuses

To add fuses to the GMT fuse block, see the “2.5.1 Install GMT Fuse Connections” procedure on page 2-25.

2.6.2 Small to Medium System Upgrade

To upgrade a small system (2 rectifiers, no 1 RU Distribution Shelf) to a medium system (3 rectifiers, 1 RU Distribution Shelf with 2 circuit breakers), use the following sections:

•2.2.2 Install the 1 RU Distribution Shelf, page 2-6

•2.2.2.1 Install the Communications Cabling (Optional), page 2-7

•2.2.2.2 Install the DC Power Cabling (Optional), page 2-8

•2.2.3.3 Install the 1 RU Distribution Shelf Ground, page 2-11

•2.3.1 Install the Rectifiers, page 2-16

•2.5.2 Install 1 RU Distribution Shelf Load Connections, page 2-26

Cisco AC/DC Power System User Guide, R1.0

2-28 May 2006