HB700 | CPU | PMC921xEx | en | 24-04 13
Education of the personnel > Qualification
Degree of protection
1.7 Protective devices
The place of installation of the CPU must comply for devices according to IP20.
WARNING
Serious danger due to improper use
Serious dangers for the user and/or damage to property can result from
improper or non-intended use and manipulation of the CPU.
NOTICE
Property damage due to incorrect use
The IP20 (IEC 60529/EN 60529) protection class of the CPU is intended for a
clean and dry environment.
− Do not subject the CPU to mechanical and/or thermal stress that exceeds
the limits described.
− Please note that you must install the CPU in a lockable housing or a
lockable control cabinet with at least protection class IP54 for proper
operation.
1.7.1 Notes on security
NOTICE
Unauthorized physical access
There is a risk of manipulation of the CPU through unauthorised physical
access.
− Protect your system from unauthorised physical access. Use a lockable
control cabinet, for example.
NOTICE
Unauthorized deletion/replacement of the safety-related project possible
− Only provide the roles for user authentication “Admin”, “Commissioner”,
and “Engineer” to those users who are authorized to program the safety-
related control. Otherwise, the unauthorised exchange or deletion of the
safety-related project by the user cannot be ruled out. Y
ou can set user
roles in the web-based management. ⮫‘User Authentication’...page 200
− It is imperative that you install the CPU and the modules in a row in
a lockable housing or a lockable control cabinet. The device housing is
not protected against manipulation and access to the CPU cannot be
validated. Access to the SD card is possible so that data can be read and
manipulated. W
e recommend protecting the slot of the parametrization
memory (SD card) on the CPU against manipulation with a seal.
1.8 Education of the personnel
WARNING
Risk of injury resulting from insufficient qualification!
Improper use can cause considerable personal injury and material damage.
Therefore: The special activities may only be executed by personnel nominated by the
respective chapters.
1.8.1 Qualification
In the manual the following qualifications for dif
ferent activities are defined:
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