Edge-Core ES4704BD, Руководство пользователя, Страница: 44 / 93

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At the same time, another power supply becomes responsible for the power supply of the
whole switch. When the failure power supply module returns to normal state or its switch
is turned on, the alarming indicator will be off.
The power supply modules are installed on the upper part of the machine chassis,
and are connected with the backplane of the switch through specific interfaces. The two
power supply modules are fixed on the machine chassis with two screws. Each power
supply module has one switch. Under normal operation conditions, two switches shall be
turned on. For changing power supply modules, it is not necessary to open the chassis.
You may turn off the switches of corresponding power supply modules and screwing off
the fixing screws for changing the modules.
1.4.3.1.1 EM4704BD-AC (Alternating Current Power Module)
When powered by AC inputs, the AC power module EM4704BD-AC and
corresponding AC distribution box should be used in the ES4704BD. The input voltage of
the EM4704BD-AC is 90V/264 VAC, with ranges between 90 ~ 264 VAC and frequency
between 50 ~ 60 Hz, the maximum output power is 400W.
1.4.3.1.2 Power module Front Panel
The front panel of EM4704BD-AC is equipped with power supply switches, power
supply indicators as well as ventilating and cooling port and a handle for inserting and
pulling out the modules.
The Front Panel view is shown below:
Fig 1-20 EM4704BD-AC Front Panel View
1.4.3.1.3 LED
The LED description of EM4704BD-AC is as follows
Table 1.22 The Description of EM4704BD-AC LED
LED Panel Status Description