2
02
0-
11
190
Appendix
292
"Out of specification" alarm
of a device coupler
detected for several
devices
Spur short circuit
Check spur of the missing
device
The spurs of missing
devices or an empty spur
shows bad current
changes
Check cable connections
and devices at the affected
spur
The maximum power rating
of the device coupler is
exceeded
Reduce power consump
-
tion of devices connected
to the device coupler
An ELS or a surge protec
-
tor sends an alarm. Device
coupler LED should blink
three times
Check device sending the
alarm and check any ELS
and surge protectors con
-
nected to it
ELS sends alarm. The
device coupler LED should
blink three times
Check ELS of the device
coupler with active alarms
An empty spur is short cir
-
cuited or shows bad cur
-
rent changes
Check empty spurs of the
corresponding device cou
-
pler
A diagnostic value exceeds
defined value. The device
coupler LED should blink
two times
Check the device coupler
manual for details
293
Signal level of one device
is too low for the given
topology, signal level of
others OK
Device malfunction: Signal
level is too low
Replace device
Too many terminators
Check that one terminator
is installed on each end of
the trunk cable, but no
more than these two in total
294
Signal level of one or more
devices is too low for the
given topology
Too many terminators
Check that one terminator
is installed on each end of
the trunk cable, but no
more than these two in total
Terminal failure: corrosion Check if the resistance of
any terminal is too high
Cable resistance is too
high
Check if the correct cable
is installed and the cable
can be used for the topol
-
ogy
Topology error - installed
topology does not match
configured topology
Check that the topology
settings match the installa
-
tion
Device coupler failed
Check device couplers and
device coupler terminals
295
Signal level of one or more
devices is too high
2 devices connected to a
spur
Connect only one device to
a spur
Not enough terminators
Check if a terminator is
installed on both ends of
the trunk
Topology error - installed
topology does not match
configured topology
Check that the topology
settings match the installa
-
tion
ID
Phenomenon
Cause(s)
Action(s)