Specifications
AS-Interface slaves
Modules with special functions
Ground-fault detection modules
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Siemens IK PI · 2012
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Overview
"Ground faults in any control circuit must not lead to unintentional
starting or potentially hazardous movements or prevent the
machine from stopping." (EN 60204-1 / VDE 0113-1).
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.
Note:
Not suitable for AS-Interface Power24V.
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Selection and ordering data
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Overview
AS-Interface overvoltage protection module
The AS-Interface overvoltage protection module protects down-
stream AS-Interface devices or individual sections in AS-Inter-
face 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 and degree of protection
(IP67) as the AS-Interface K45 compact modules. It is a passive
module without AS-i IC and as such does not need its own
address on the AS-Interface network.
The module can be used to protect the AS-Interface cable and
the cable for the auxiliary voltage 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 sys-
tem'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.
Version Order No.
3RK1 408-8KE00-0AA2
Ground-fault detection module
Width 22.5 mm
• With screw terminals 3RK1 408-8KE00-0AA2
• With spring-type terminals 3RK1 408-8KG00-0AA2
Overvoltage protection module
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