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Siemens IC 10 · 2017
AS-Interface
ASIsafe
Introduction
2
AS-i safety solution with local evaluation by MSS
AS-Interface design with 3RK3 Modular Safety System (MSS)
The local AS-i safety solution uses the 3RK3 Modular Safety
System (MSS) for safety-related processing. In this case,
one standard controller (i.e. no F-CPU) and one standard
AS-i master are sufficient.
The allocation of tasks is as follows:
•
Acquisition of safety-related signals via safe input slaves on
the AS-Interface bus.
Further signals can be acquired via F-DI inputs of the central
unit or the expansion modules of the MSS.
•
Acquisition and processing of signals via the central unit
of the MSS
•
Reacting by means of safety output modules on the
AS-Interface bus or via F-DQ outputs of the central unit or
expansion modules of the MSS
■
Benefits
•
Simple system structure thanks to standardized AS-Interface
technique
•
Safety-related and standard data on the same bus
•
Existing systems can be expanded quickly and easily
•
Optimum integration in TIA (Safety Diagnostics) and Safety
Integrated
•
Inclusion of the safety signals in the plant diagnostics,
also on existing HMI panels
•
Approved to PL e according to EN ISO 13849-1 or SIL 3
according to IEC 61508
•
ASIsafe is certified by TÜV (Germany), NRTL (USA) and INRS
(France)
■
Application
Integrated safety technology in the AS-Interface system can be
used wherever EMERGENCY STOP buttons, safety gate inter-
locks, safety switches, light grids and two-hand operation are
installed.
■
More information
Operational
control
Controls
e. g.
SIMATIC S7-1500
or SIMATIC S7-300
Operational
control
Safe position switch with tumbler
Field module
Load feeder with safe AS-i outputs
Digital K45 field module
3RA2 load feeder
Safe EMERGENCY-STOP
Safety-oriented
processing
Safety-oriented
processing
Safety-oriented
processing
SIMATIC S7-1200
with CM 1243-2
PROFINET
PROFIBUS
IE/AS-i LINK PN IO
AS-Interface / ASIsafe
MSS
MSS
AS-Interface / ASIsafe
DP/AS-i LINK Advanced
MSS
AS-Interface / ASIsafe
IC01_00167c
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More information
For further information and typical circuit diagrams on safety engineering,
© Siemens AG 2016