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Siemens IK PI · 2015

AS-Interface

ASIsafe

Introduction

■

Overview (continued)

AS-i safety solution with local evaluation by MSS

AS-Interface design with 3RK3 Modular Safety System (MSS)

The local AS-i safety solution utilizes the 3RK3 Modular Safety

System (MSS) to process safety-related signals. Use of a stan-

dard controller (i.e. not an F-CPU) and a standard AS-i master is

sufficient for this purpose.

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

• Reaction via safe output modules on the AS-Interface bus

of via F-DQ outputs of the central unit or expansion modules

of the MSS

■

Benefits

• Easy plant configuration thanks to standardized AS-Interface

technology

• 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 is used

wherever EMERGENCY-STOP pushbuttons, protective door in-

terlocks, safe position switches, light arrays and two-hand oper-

ator controls are installed.

■

More information

More information and circuit examples relevant to safety

systems see

http://support.automation.siemens.com/WW/view/en/20208582.

Operational

control

Controls

e. g. SIMATIC S7-300

Operational

control

Safe position switch with door interlock

Fieldmodule

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

PROFINET

PROFIBUS

IE/AS-i LINK PN IO

AS-Interface / ASIsafe

MSS

SIMATIC S7-1200

MSS

AS-Interface / ASIsafe

DP/AS-i LINK Advanced

MSS

AS-Interface / ASIsafe

IC01_00167a

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