Siemens UL 1066 Operating Instructions Manual page 142

9.2.2.3 COM16 module
Interface adapter for:
- converting csignals to MODBUS signals and vice-versa
- for draw-out circuit breakers:
detecting the circuit breaker position in the cradle with the signaling switches S46, S47 and S48, and emitting corresponding
signals on the cand the MODBUS.
- providing special functions via additional inputs and outputs (e.g. to control the circuit breaker and for parameterization)
Overview
(1) Connection terminals for additional inputs and outputs to provide special functions
(2) SUB-D plug, 9-pole, for
c
(3) LED
MODBUS
(4) LED
(5) Connecting cables to hand plug X8
c
(6) connection for connecting external
Indicators
LED Indication
off
MODBUS green
red
off
green
c
green flashing
red
- For installation and connection of the COM15 module, please refer to installation and connection of the COM15 module
 (page 9-58)
9 – 62
MODBUS
connection
c
Significance
No voltage at COM16
MODBUS
communication operating
no MODBUS communication (timeout)
c
No modules found
ccommunication operating
cparticipant found, but no connection to ETU or metering function
cfault
modules or for the terminating resistor