Wiring
Distributed I/O Device ET 200R
4–2
(4)J31069-D0427-U001-A2-7618
4.1
General rules and regulations for operating the
ET 200R
As a component of plants or systems the ET 200R distributed I/O device requires
that special rules and regulations be adhered to based on the particular application
area.
This section gives you an overview of the most important rules which you will need
to adhere to when you integrate your ET 200R distributed I/O device in a plant or
system.
Specific application
Adhere to the safety and accident-prevention regulations for your specific applica-
tion (e.g., machine guidelines 89/392/EWG).
EMERGENCY-OFF routines
EMERGENCY-OFF routines in accordance with IEC 204 (corresponds to DIN VDE
113) must remain active in all operating modes/states of the plant or system.
24 V DC voltage
The following table shows what you must keep in mind for the 24 V DC power. .
With ...
keep in mind ...
Buildings Exterior
lightning
protection
24 V DC power lines,
signal lines
Interior lightning
protection
Provide lightning protection measures
(e.g., lightning protection components).
24 V DC power
Secure (electrical) isolation of the low safety voltage
(SELV/PELV in accordance with EN 60950) .
Protection against exterior electrical influences
The following table shows what you must keep in mind pertaining to protection from
electrical influences or faults.
With ...
keep in mind ...
All plants or systems in
which the ET 200R is
installed
The plant or the system is connected to function ground to
divert electromagnetic interference.
Power,
signal and bus lines
The lines are installed correctly.
Signal and bus lines
A line or core break may not be allowed to create an undefined
state of the plant or the system.
