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5.2.2 Redund ant Power Modules of A
The O
B
with redundant, hot-plug power modules can be connected to two independent
MNI
US
power nets. If one of the two power modules or a power net is failing the LED
at the front changes from green to red and starts blinking. This LED remains blinking as long as
the failure persists, please refer to section
be, that one power module has failed. Therefore proceed as follows:
Open the ventilation flap as explained in section
Examine the power modules. They are located at the lower front of the O
1
securing screw
2
green LED: Output power good
3
handle
4
green LED: Input power good
5
air supply
Each power module has again two LED's to indicate the power state, the right LED
[4] is lightened if the connection to the power supply is OK. The left LED
good
[2] is lightened, if the output power of the module is OK. The table below lists the different
good
LED status combinations and their meaning:
LED [4] Input
LED [2] Output
power good
power good
On
On
On
Off
Off
Off
If you detected that one power module must be exchanged then, switch off the power supply by
means of the respective power switch [26] on the back of the O
3.1.2 Argus OmniBus
On the front loosen the securing screw [1] of the defective power module. You need an Allen
key size 3/16" to turn the screw. This Allen key was provided with the system. When the screw
is loosened use the handle [3] to remove the module.
DOC-3266-2
Argus Workstation for Windows
O
RGUS
3.1.2 Argus OmniBus
1
2
5
Meaning
There is power supplied to the power module and it is
working well.
There is power supplied to the power module. The power
module has a failure and must be replaced.
There is no power supplied to the power module, e.g. the
power net failed or the power cable is not connected.
In rare cases it could be possible that there is a defect at
the contacts of the power module. Then it might help to
exchange the power module.
. The
LED Input power good
December-2003
B
MNI
US
. One of the possible reasons could
5.2.1 Opening the front of the Argus OmniBus
3
4
5
5
LED states of the power modules
B
MNI
[4] should then be off.
operating status
.
B
.
MNI
US
Figure 5-4
Front view of the power module
Input power
Output power
Table 5-1
, please refer to section
US
[3]
5-6
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