Description
2.8 Communication and system connection
3WA1 air circuit breaker
166 Equipment Manual, 02/2023, 92310000002-06
Temporary activation/deactivation
Remote Switching Protection (RSP) can be temporarily activated, e.g. via a selector
switch in the control cabinet door. This prevents the circuit breaker from being opened or
closed. This increases the safety for operating and maintenance personnel.
Furthermore, remote switching via the communications interfaces can be temporarily
activated if necessary (e.g. via PLC). This measure prevents unintentional switching of
the circuit breaker and increases cybersecurity.
You will find more information under White paper
(
https://new.siemens.com/global/en/products/energy/low-
voltage/components/sentron-protection-devices/3wa-air-circuit-breakers.html).
Permanent deactivation
Remote Switching Protection (RSP) can be permanently deactivated if the RSP terminals
on the X62 connector are short-circuited. Thus, switching via the PROFINET, Modbus
TCP and Modbus RTU communications interfaces is not restricted and is always
possible.
Permanent activation
Remote Switching Protection (RSP) can be permanently activated if the RSP terminals
on the X62 connector remain open (factory setting). It is therefore not possible to
open/close the circuit breaker via the PROFINET, Modbus TCP and Modbus RTU
communications interfaces.
Software-based access protection functions
Signed firmware
Firmware updates of the COM190 communication module are digitally signed by
Siemens with a private key and thus protected against manipulation. The communication
module detects faulty, manipulated firmware packages or firmware packages intended
for another device and rejects the installation.
Digitally signed firmware updates make the COM190 communication module future-
proof and support the installation of additional security functions and security updates.
Network protection
In addition to using the security functions of the COM190 communications module, the
network infrastructure in which the 3WA circuit breaker is operated should also be
secured. For this purpose, it makes sense to release only required ports. It is also
possible to block ports if communication outside the local network is not desired.
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