Owner`s manual

1–8 DEChub 900 MultiSwitch Owner’s Manual
Hub Power System Overview
The DEChub 900 MultiSwitch hub power system can:
• Power a fully-configured hub with power redundancy
• Monitor the power activity
• Calculate the power available to network modules
• Display the power status and available power
• Allocate power to network modules.
The power system consists of 1 to 4 power supply modules, and a Hub Manager that
monitors and polls each power supply for identification and status.
The hub power system is designed to allow for the installation of incremental power
supply modules as the hub system needs expand. Up to four power supply modules
can be installed into the hub with all power supply modules sharing power delivery to
the chassis and to the network modules on a common bus.
Fully configuring a DEChub 900 MultiSwitch with half-height network modules typi-
cally requires only a single power supply module. An additional power supply mod-
ule provides power redundancy. You provide redundancy to the power system by
adding an extra power supply module beyond what is needed to power the hub with
installed network modules. For example, if a single power supply module provides
enough power for the hub, and you add a second power supply module, then the hub
has redundant (N+1) power. If either of the power supply modules fail, the hub con-
tinues to operate without interruption.
The Hub Manager monitors the power system for power supply modules that may
have been inserted or removed from the hub. When changes are detected in the
power system, the Hub Manager updates the amount of power available to the net-
work modules, and determines if:
• The system is underpowered or adequately powered with all network mod-
ules powered up.
• The hub platform is configured as N+1 (or more) for redundant power system
operation.