Black Box twister 7000, Инструкция по установке и эксплуатации

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32 User Guide
SECONDARY
Power Supply
PRIMARY
Power Supply
100 BASE
LK
AT
LK
AT
PWR
R
X
TX
FX
T
X
100 BASE
“redundant twister”
MAIN
RESET
LK
AT
PRIMARY
LK
AT
SECONDARY
LK
AT
R
X
T
X
R
X
T
X
PWR
SW
100 BASE
“redundant twister”
MAIN
RESET
LK
AT
PRIMARY
LK
AT
SECONDARY
LK
AT
R
X
T
X
R
X
T
X
PWR
SW
DISCONNECT ALL POWER
SOURCES BEFORE SERVICING
AC IN 90-250V
50/60Hz 1A
POWER ACTIVE
DISCONNECT ALL POWER
SOURCES BEFORE SERVICING
AC IN 90-250V
50/60Hz 1A
POWER ACTIVE
Operating Features of the “twister” Power Supply Modules
Load Sharing Power Supply Modules (LE7312A-R2, LE7312-PS-R2)
When a chassis is equipped with two load-sharing power supply modules,
they operate in tandem and share the connected load. This decreases the
demand put on each individual unit.
There are two LEDs on the front panel of each Power Supply Module.
When illuminated, these LEDs indicate the following:
• POWER LED indicates the connection of an active
power source to that Power Module
• ACTIVE LED indicates that the “twister” chassis is
getting its power from that particular Power Module
Because the LE7312A-R2 and LE7312-PS-R2 load-shares power, both
LEDs – on both units – are illuminated simultaneously.
If the power source to one of the modules should fail or be removed, the
remaining module automatically takes over the entire load. This will be
indicated by the following:
• The ACTIVE and POWER LEDs on one of the power
modules turn off.
• The ACTIVE and POWER LEDs on the other
power module remain illuminated.