Technical speci‐
cations
Current
[mA]
Making cur‐
rent
[A]
Peak length
[ms]
Power loss
at 24V [W]
Comment
COM 041
(PROFINET IO)
50 1 < 1 2
COM 042
(Modbus TCP)
26 1 < 1 1
COM 043
(Modbus RTU)
36 1 < 1 1
IOM 040
(IEC 61850)
22 1 < 1 1
MF Basic 0 0 < 1 0 No current consump‐
tion, power supply via
voltage at primary con‐
ductors
MF Advanced 0 0 < 1 0 No current consump‐
tion, power supply via
voltage at primary con‐
ductors
You will nd additional information in the 3VA Communication System Manual (http://
www.siemens.com/3VA-Documentation).
You will nd information about the entire communications system, the ordering options,
data structures, and installation instructions, and the Modbus data structure as an Excel
le on the Internet at Siemens Online Support (https://support.industry.siemens.com/cs/
document/109750691/3wl10-kommunikations%C3%BCbersicht?dti=0&lc=en-WW).
Digital I/O module IOM040
These modules are suitable for all electronic trip units of the 6-series.
The digital I/O modules IOM040 provide two input and two output contacts for control and
remote signaling of alarms and tripping of the circuit breaker. They can be used for the
electronic trip units with display (6-series). Via the display of the ETU or the powercong
software, default settings of the inputs and outputs can be selected and congured.
Ready-to-close signaling switch for communication (COM RTC)
The ready-to-close signaling switch COM RTC provides the same information as the ready-to-
close signaling switch RTC, see Section Auxiliary, alarm, and signaling switches (Page 100). It is
used to query whether the circuit breaker is ready to close.
Unlike the RTC signaling switch, whose signals are available at the auxiliary conductor
terminal system, the signals of the ready-to-close signaling switch COM RTC are forwarded
via the communication link.
Actuator module (COM ACT)
The actuator module (COM ACT) is a communication link for the remote operation of auxiliary
solenoids (CC/ST). With the actuator module, the circuit breaker can be opened and closed by
remote access.
Accessories
3.3Accessories for communication link, remote switching, and I/O modules
3VA27 molded case circuit breakers & 3WL10 air circuit breakers
108 Equipment Manual, 10/2023, L1V30499596002-03