User guide

12 User Guide
Operating Features of the Load-Sharing Power Supplies
The R1000 Premise Service Platform is shipped with two 12V internal fixed
power supplies. Depending on the model, these load-sharing power supplies are
designed for AC and/or DC power sources.
The two power supplies are designed to operate in tandem and share the load. If
the power source to one of the supplies fails, the other power supply automati-
cally 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 an individual power supply, thus prolonging its life.
When the power (PWR) LED is lit, it indicates that its corresponding power
supply is connected to an active power source and delivering power to the
platform’s backplane. Both PWR LEDs are lit simultaneously when both power
supplies are sharing the load.
Important: Refer to the text on the front or rear panel for voltage/current
ratings. Reliable grounding of rackmount equipment must be maintained. Give
particular attention to power supply connections other than direct connections
to the branch circuit (e.g., use of power strips).
AC Power Supply Connections
Each AC power supply includes a standard North American three-pin cord
which is UL (USA), CSA or CUL (Canada) listed or approved. For installation
in regions outside North America, replace the power cord with a cord approved
by appropriate safety agencies. Any cord must have a CEE-22 standard V
female connector on one end and meet IEC 320-030 specifications. European
power cords must be harmonized and designated with a HAR marking on the
outside of the cord jacket to comply with the CENELEC Harmonized Document
HD-21.
When making power connections, connect the power cord to the input jack
before making the IEC 320 connection to the outlet or appropriate voltage
source. If your unit is equipped with two AC power supplies, be sure to connect
the individual power cords to separate power sources.