Specifications
AS-Interface
Slaves
Modules with special functions
Ground-fault detection modules
2/50
Siemens LV 1 · 2007
2
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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 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
■
Overview
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, connection and degree of
protection (IP67) as the AS-Interface user modules. It is a pas-
sive 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 according to a specific test program.
With waveform 8/20, 100 % of the value is achieved after 8 mi-
croseconds 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,
established 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 or PG-E coupling module is required for connection of
the AS-Interface cable and the auxliary power supply cable.
Version DT Order No. Price
per PU
PU
(UNIT,
SET, M)
PS* PG Weight
per PU
approx.
kg
3RK1 408-8KE00-0AA2
Ground-fault detection modules
• With screw terminal connection } 3RK1 408-8KE00-0AA2 1 1 unit 121 0.142
• With spring-loaded terminal connection }
3RK1 408-8KG00-0AA2 1 1 unit 121 0.117
Modules with special functions
Overvoltage protection modules
* You can order this quantity or a multiple thereof.
© Siemens AG 2007