APC Automatic TransferSwitch Quick Start Manual Page 6

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Automatic Transfer Switch Installation and Quick Start2
Overview
Front panel
No.
Item Description/Function
Reset switch Restarts the Network Management Card.
Ethernet port Connects the Automatic Transfer Switch to your network,
using a network cable.
Link–RX/TX LED Indicates whether there is activity on the network.
Status LED Indicates whether power is applied to the Network
Management Card.
Preference button Sets the preferred source to supply power to the load
equipment. In normal operation, if both sources are available,
the Automatic Transfer Switch will use the preferred source.
Press the Preference button to change the preferred source.
Preference A and B
LEDs
Indicates which of the two sources, if any, is selected as the
preferred source. If both LEDs are off, neither source is
preferred. If a source is asynchronous, the source’s LED will
flash once per second.
Source A and B LEDs Provides information about the input voltage from each source.
If the RMS input voltage and the measured frequency are
within the selected tolerance range, the corresponding
indicator will light.
In a normal operating condition (full source redundancy), both
LEDs are illuminated.
Connector LEDs Indicates which source is being used for the output (only one
arrow will be lit at any time). The combination of Source
LEDs, Connector LEDs, and Output LED provide a graphical
view of the power flow through the Automatic Transfer
Switch.
Output LED Shows that voltage is available at the output for the Automatic
Transfer Switch.
Configuration port The local connection for accessing all the setup, status,
maintenance, and diagnostic information for the Automatic
Transfer Switch.
Configuration
A
B
Output
Input
Preference
AB
A
utomatic
Transfer Switch
mph0026b
Reset
Link - RX/TX Status
10/100
Smart Slot
Network Management Card
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