User guide

Radiance R400 Premise Service Platform 15
Operating Features of the Load-Sharing Power Supply
The R400-AC load-sharing AC power supply is designed for use with the R400
platform and provides 30W of power. The R400-2HS-1A is shipped with one
power supply, however, the unit can be upgraded with a second power supply.
When an R400 platform is equipped with two load-sharing power supplies, they
operate in tandem and share the load. If the power source to one of the supplies
fails or is removed, the remaining power supply automatically provides the
entire power load to the platform. This setup provides both the platform and the
network with uninterrupted service. It also decreases the demand placed upon
each individual power supply unit thus prolonging its life.
For visible verification of the operating status of the power supplies, the
management card provides two LEDs labeled “A” and “B.” When lit, the LED
indicates that its corresponding power supply is connected to an active power
source and providing power to the platform backplane. When two power
supplies are installed, both LEDs are lit simultaneously. If one of the power
supplies fails, it can easily be identified by the unlit LED.
If the R400 does not have a management card installed, verify power to the
platform via the status of the power (PWR) LED on the installed line card(s).
The PWR LED is lit while the platform is receiving power from one or both
power supplies. When using redundant power, the PWR LED remains lit even if
one of the power supplies fails; it turns off only if both power connections fail.
To optimize redundant power capability, installment of a management card is
recommended.