LED
LED Indication when Lighted
LED Indication with FOS3 for C37.94
H5
yellow
BUF alarm
Buffer overflow or under run
Source: Supervisory circuit of FPGA
AIS alarm (“Alarm Indication Signal” alarm)
LED on: “all ones” received. The multiplexer
lost the higher order link, it will send all
one in the data bits to SWT3000.
H6
yellow
MOD-alarm
Modulation alarm, carrier frequency at the
optical receiver not detected
RDI alarm (“remote defect indicator” alarm)
LED on: remote side of C37.94 connection
entered a LOS alarm state.
H7
yellow
COM-alarm
Communication alarm at the electrical
interface
Debug information (for test purpose)
H8
yellow
SFP_LOS
The received optical power is below the
receiver sensitivity
Loss of signal
Debug information (for test purpose)
H9
yellow
S6 asserted
Debug information (for test purpose)
i
i
NOTE
If there is a FOM connection, the configuration of the external SWT 3000 is executed via the PowerLink
with the service program PowerSys. The service interface of the PU4 in the external SWT 3000 cannot
be used.
Fiber Optic Module
11.1 Fiber-Optic Module
Smart Communication, SWT 3000 Teleprotection, Equipment Manual
349
C53000-G6040-C605-1, Edition 03.2020