35
Label
On Green
Power Module Output Status is okay
Output LED
Output
Good
Off
Power Module has no output
On Yellow
Faulty Power Module /Not turning-on
The Output Switch
Abort LED
Fault
Off
Power Module Working Fine
1.4.3.1.4 Switch of power supply for front panel
EM4704BD-AC provides a power supply for controlling the power output of control
module. Under normal operation conditions, the switches for power supply modules shall
be turned on concurrently. When the switch of one power supply module is turned on and
another is turned off, the FAULT indicator of the module will be on to suggest the users to
turn on the switch so as to utilize 1+1 redundant backup.
1.4.3.2 EM4710BD-AC
ES4710BD uses 2 +1 redundant power supplies, three power modules can act as
backups for each other. During normal operation, all three power modules each take one
third of the load. If one of the modules fails or is not present, the other two power modules
will supply power for the whole switch, and the corresponding POWER/Fail warning
indicator for the failed/missing module will illuminate, prompting the replacement of the
failed module. The warning indicator will turn off after the failed module is replaced or
recovers.
The ES4710BD power module is installed in the lower section of the chassis, and
connects to the power board of the switch. All the power modules attach to the chassis
with 2 screws, respectively. When replacing the power modules, the chassis need not to
be opened, just remove the 2 fastening screws to take out the power module requiring
replacement.
1.4.3.2.1 EM4710BD-AC (Alternating Current Power Module)
When powered by AC inputs, the AC power module EM4710BD-AC and
corresponding AC distribution box should be used in the ES4710BD. The input voltage of
the EM4710BD-AC is 110V/220 VAC, with ranges between 90 ~ 264 VAC and frequency
between 50 ~ 60 Hz, the maximum output power is 600W.
1.4.3.2.2 Power module Front Panel
There are vents (with dust gauzes), 2 fastening screws and handle for replacing the
modules on the front panels of EM4710BD-AC.