SIEMENS
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Siemens IK PI · 2015
AS-Interface
ASIsafe
AS-Interface safety modules
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Overview
AS-Interface safety modules: K45F (left), K20F (center) and
S22.5F (right)
S45F SlimLine module, safe AS-i output
Safety modules for AS-Interface (ASIsafe modules) are available
for field use in degree of protection IP67 (K20F and K45F
compact modules) and for the control cabinet (S22.5F SlimLine
modules) in degree of protection IP20.
A very compact module with an optimum price/performance
ratio is thus available for very application.
All modules for the connection of (mechanical) switches and
safety sensors with contacts feature cross-circuit monitoring of
the connected sensor line. On versions for the connection of
solid-state switches and safety sensors (e.g. light arrays) the
cross-circuit monitoring must be performed by the sensor.
The following modules are available for selection:
K20F compact safety modules for use in the field
Being only 20 mm wide, the K20F module is particularly well
suited for applications where modules need to be arranged in
the most confined space. The K20F modules are connected to
the AS-Interface with a round cable with M12 cable box instead
of with the AS-Interface flat cable. This enables extremely com-
pact installation. The flexibility of the round cable means that it
can also be used on moving machine parts without any prob-
lems. The K20 modules are also ideal for such applications as
their non-encapsulated design makes them particularly light in
weight.
K45F compact safety modules for use in the field
The platform of the K45F modules covers the following varia-
tions:
•
Connection of ("mechanical") switches/safety sensors
with contacts:
- K45F 2F-DI: Two safety-related inputs in operation up to
Category 2 according to EN ISO 13849-1. If Category 4 is
required, a two-channel input is available on the module.
- K45F 2F-DI/2DO: There are also two standard outputs in ad-
dition to the safe inputs. Supplied from the yellow AS-i cable
- K45F 2F-DI/2DO
U
aux
: same as K45F 2F-DI/2DO, but sup-
plied from the black 24 V DC cable
-
K45F 4F-DI: Four safety-related inputs in operation up to Cat-
egory 2, two for Category 4. Extremely compact double
slave (uses two full AS-i addresses).
•
Connection of solid-state switches / safety sensors (non-con-
tact protective devices, ESPE):
-
K45F LS (light sensor): Safe input module for the connection
of electronic safety sensors with testing semiconductor out-
puts (OSSD)
In particular non-contact protective devices such as active,
optoelectronic light arrays and light arrays for Type 2 and
Type 4 according to IEC 61496.
Transmitters as well as receivers are supplied with power
from the yellow AS-i cable. Matching sensor cables and op-
tionally a separate transmitter supply module are available
as accessories.
S22.5F SlimLine safety modules for use in control cabinets
and local control cabinets
The S22.5F SlimLine safety module has two safety inputs. The
safe connection of signals to ASIsafe networks in the cabinet is
also possible therefore. For operation up to Category 2, both
inputs can be separately assigned; if Category 4 is required, a
two-channel input is available on the module.
In addition there are two S22.5F module versions which have two
standard outputs in addition to the two safety inputs; power is
supplied either from only the yellow AS-Interface cable or as
auxiliary voltage from the black 24 V DC cable.
S45F SlimLine safety modules with safe outputs for the safe
distributed disconnection of actuators
With the safe S45F SlimLine-Module, the shutdown signal, for
example from the Modular Safety System, can be used through
the ASIsafe for distributed safety-related disconnection.
To this end, the module has a dual-channel relay output with
which an enabling circuit up to safety category 4 and Perfor-
mance Level e according to EN ISO 13849-1 and SIL 3 accord-
ing to EN 62061 / IEC 61508 can be deactivated safely.
As an additional possibility the module offers normal switching
of the output using an AS-i standard output bit.
The module has three digital inputs and two digital outputs for
the additional connection of sensors and actuators. These can
be used, inter alia, for the necessary monitoring of downstream
contactors of the feedback circuit.
© Siemens AG 2014