User's Manual

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5.5.4 OEU Alarms
Item Description
1.EWDM LED LED indicator to check EWDM state to see if it is abnormal
2.DOU LED LED indicator to check DOU module state to see if it is abnormal
3.System LED and Reset
Communication state with devices, alarm status of the system and reset
switch
4. NMS(RS-232C port)
RS-232C port for communication and diagnosis of devices through
PC/laptop
LED information
Unit LED Indicates
Green: Laser Diode is normal.
LD
Red: Laser Diode is abnormal.
Green: Photo Diode is normal.
EWDM
PD
Red: Photo Diode is abnormal; check optical cables.
Green: Laser Diode is normal.
LD
Red: Laser Diode is abnormal.
Green: Photo Diode of optical port 1 is normal.
PD1
Red: Photo Diode of optical port 1 is abnormal; check optical cables.
Green: Photo Diode of optical port 2 is normal.
PD2
Red: Photo Diode of optical port 2 is abnormal; check optical cables.
Green: Photo Diode of optical port 3 is normal.
PD3
Red: Photo Diode of optical port 3 is abnormal; check optical cables.
Green: Photo Diode of optical port 4 is normal.
DOU1,2
PD4
Red: Photo Diode of optical port 4 is abnormal; check optical cables.
System
ON Green: ECPU is normally power-supplied.