Siemens UL 489 Operating Instructions Manual page 167

Indicators
LED Indication Meaning
green
green 
flashing
PROFINET IO
red
green
green 
Modbus TCP
flashing
off
off
green
c
green 
flashing
red
Utilizing the programmable DAS function of the COM35:
DAS switch
ON/OFF
The COM35, exclusively, provides the ability to activate the DAS function of the WLETU776 directly via the COM35's programmable I/O.
When the COM35 is programmed to enable this function, opening the connection between terminals 1 and 3 will cause the trip unit to switch
to Parameter Set B. When contact is made between these two terminals, the trip unit will utilize Parameter Set A. The programmable output
can then be used to activate a local status indicator (as illustrated). This COM35 I/O functionality must be programmed by the user via 
Siemens powerconfig software.
The programable output can carry a load of 1A, up to an ambient temperature of 45C (113F). Above that, the current–carrying capability of
the output should be de-rated to 400mA at 70C (158F). The length of the wires connecting the activation switch to the input of the COM35
should be less than 50m (165ft) and be AWG18. Twisted/shielded-pair wiring is recommended for cable runs approaching this length.
Normal PROFINET IO communcation
Communication with PROFINET IO
Controller, no communication with
PROFINET IO Supervisor
No communication with PROFINET IO
Controller, no communication with
PROFINET IO Supervisor
At least one opened Modbus TCP
connection
Ethernet link available but no Modbus
TCP connection
No Ethernet link
No cparticipant active
ccommunication operating
No ETU installed (e.g: non-automatic/
disconnect switch application)
cerror
24V DC
DAS Status indicator
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