Siemens SENTRON 3WA1 - Access Protection Functions

Description
2.8 Communication and system connection
3WA1 air circuit breaker
Equipment Manual, 02/2023, 92310000002-06
163
2.8.3.6 Access protection functions
Overview
To restrict access to the communications module or prevent unauthorized access, the
module offers several access protection functions. These access protection functions are
implemented both as hardware and software functions and in network security:
• Hardware protective functions:
– Parameter write protection
– Remote Switching Protection
• Software protective functions
– Modbus TCP whitelist (COM190)
– Settable TCP port (COM190)
– Signed firmware
• Protection of the network infrastructure
Hardware-based access protection functions
The COM190 and COM150 communication modules have two hardware access
protection functions.
The parameter write protection prevents parameters from being changed and
unintentional actions from being carried out. It is part of the cybersecurity functions.
Remote Switching Protection prevents the 3WA circuit breaker from being closed and
opened via the fieldbus communication connections.