Specifications
AS-Interface Slaves
Modules with special functions
Ground-fault detection modules
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Siemens IK PI · 2009
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Overview
"... Ground faults in control circuits must not result in a machine's
unintentional starting or hazardous movements, nor must they
prevent it from stopping (EN 60204, Part 1 or DIN VDE 0113)."
The AS-Interface ground-fault detection module is used to meet
these requirements. Using this module from the SlimLine series,
ground faults in AS-Interface systems can be reliably detected
and reported.
The following ground faults are detected:
• Ground fault from AS-i "+"
• Ground fault from AS-i "-"
• Ground fault from sensors and actuators which are supplied
from the AS-Interface voltage.
One module per AS-Interface network is required.
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Selection and ordering data
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Overview
The AS-Interface overvoltage protection module protects
downstream AS-Interface devices or individual sections in
AS-Interface networks from conducted overvoltages which can
be caused by switching operations and remote lightning strikes.
The location of the overvoltage protection module forms within
the lightning protection zone concept the transition from zone 1
to 2/3. Direct lightning strikes must be coped with using addi-
tional protective measures at the transitions from lightning pro-
tection zone 0A to 1.
With the AS-Interface overvoltage protection module it is now
also possible to integrate AS-Interface in the overall lightning
protection concept of a plant or machine.
The module has the same design, connection and degree of
protection (IP67) as the AS-Interface user modules. It is a
passive module without AS-i IC and as such does not need its
own address on the AS-Interface network.
Connection to an AS-Interface system is effected through the
FK-E or PG-E coupling module. Through use of the EEMS inter-
face, the AS-Interface cable and the auxiliary voltage cable can
be protected from overvoltage.
Overvoltages are discharged through a ground cable with a
green/yellow oil-proof outer sheath. This cable is fixed in the
module and must be connected with low resistance to the
system's ground.
Rated discharge current I
sn
The rated discharge current is the peak value of a surge current
with waveform 8/20 microseconds, for which the overvoltage
protection module is rated in according to a specific test pro-
gram.
With waveform 8/20, 100 % of the value is achieved after
8 microseconds and 50 % after 20 microseconds.
Protection level U
p
The protection level of an overvoltage protection module is the
highest momentary value of the voltage at the terminals, estab-
lished in individual tests.
The protection level characterizes the capability of an overvolt-
age protection module to limit overvoltages to a residual level.
Accessories
An FK-E (3RG9030-0AA00) or PG-E (3RG9240-0AA00) coupling
module is required for connection of the AS-Interface cable and
the auxiliary power supply cable.
Version Order No.
3RK1 408-8KE00-0AA2
Ground-fault detection module
• With screw terminal connection 3RK1 408-8KE00-0AA2
• With spring-loaded terminal connection
3RK1 408-8KG00-0AA2
Overvoltage protection module