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Siemens IK PI · 2015

AS-Interface

Introduction

System components

■

Overview

To implement communication, a system installation has the

following main components:

• Master interface modules for central control units such as

SIMATIC S7, ET 200/ET 200SP distributed peripherals, or net-

work transitions from PROFIBUS/PROFINET to AS-Interface

• Power supply units, if required in combination with a data

decoupling module for the power supply to the slaves

• AS-Interface shaped cables

• Network components such as repeaters and extension plugs

(cannot be used for AS-i Power24V)

• Modules for connection of standard sensors/actuators

• Actuators and sensors with integrated AS-i slave

• Secure modules for transferring safety-related data over

AS-Interface

• Addressing units for setting the slave addresses during com-

missioning

Example of a configuration with the system components

Features

24 V DC

power

supply

AS-Interface

power supply

AS-Interface

power supply

Digital and analog

K20, K45, K60 field modules

3RA2 load

feeders

3RA6

compact

starters

SIRIUS

M200D motor

starters or

G110D

inverters

Load feeders

with safe

AS-i outputs

Safe

EMERGENCY-STOP

and field module

Signaling

columns

Pushbuttons

Indicator lights

Safe and standard control cabinet

modules S22.5 and S45

S7-1200

with CM 1243-2

CM AS-i Master ST

for ET 200SP

S7-300

CP343-2(P)

MSS

ASIsafe

MSS

Advanced

S7-200

with CP 243-2

Safety switch

without

tumbler

with

tumbler

SIMATIC/

SIMOTION

PROFINET

AS-Interface

Industrial Ethernet

PROFIBUS DP

G_IK10_XX_20027j

SINUMERIK

S7-300

CP 343-2(P)

DP/AS-i LINK Advanced

IE/AS-i LINK PN IO

DP/AS-i F-Link

DP/AS-i Link 20E

Standard EN 50295 / IEC 62026-2

Topology

Line, star or tree structure

(same as electrical wiring)

Transmission medium

Unshielded two-wire cable (2 x 1.5 mm

)

for data and auxiliary power

Connection methods

Contacting of the AS-Interface cable

by insulation piercing method

Maximum cable length

• 100 m without repeater

• 200 m with extension plug

• 300 m with two repeaters in series connection

• 600 m with extension plugs and two repeaters

connected in parallel

Larger cable lengths are also possible

when additional repeaters are connected in

parallel

Maximum cycle time • 5 ms in maximum configuration with 31 standard

addresses

• 10 ms in maximum configuration with 62 A/B

addresses

• profile-specific for slaves with extended data, e.g.

analog slaves

Number of stations

per AS-Interface line

• Up to 62 Slaves (A/B technology)

• Integrated analog value transmission

Number of binary

sensors and actuators

Max. 496 DI/496 DO

Access control

• Cyclic polling master/slave procedure

• Cyclic data acceptance from host (PLC, PC)

Error safeguard

Identification and repetition of faulty message

frames

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