
Rockwell Automation Publication ENET-UM003B-EN-P - September 2013 11
Secure Communication Architecture Chapter 1
Local Chassis Security
You can use the 1756-EN2TSC module with the following features to prevent
unauthorized access to a controller in the local chassis.
• The trusted slot feature (in the controller properties) designates slots in
the local chassis as trusted. When the trusted slot feature is enabled, the
controller denies communication through paths that are not trusted. This
requires authentication to the module for anyone to access the controller
with programming software.
• The serial number lock feature (in the 1756-EN2TSC module properties)
in conjunction with the trusted slot features restricts communication
through a module in the trusted slot with the specific serial number.
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