Specifications

AS-Interface
Introduction
Communications overview
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Siemens IK PI · 2009
6
Overview
System components
Numerous system components are offered to implement the
communication. The main components of a system installation
are:
Master interfaces for central control units such as SIMATIC S5
and SIMATIC S7, ET 200 M distributed I/O,
The AS-Interface shaped cable,
Network components such as repeaters/extenders,
The power supply unit for supplying the slaves, modules for
connecting standard sensors and actuators,
Actuators and sensors with an integrated slave ASIC,
Secure modules for transferring secure data over
AS-Interface,
The address programmer for setting the slave address.
AS-Interface master and AS-Interface Links (see network transitions)
Technical specifications
More Information
Please note the operating framework conditions in each case for
the specified SIMATIC NET products (Order No. 6GK..., 6XV1...),
which you will find on the Internet page listed below.
Additional information is available in the Internet under:
http://www.siemens.com/simatic-net/ik-info
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Standard EN 50295 / IEC 61158
Topology
Line, star or tree topology
(same as electrical installation)
Transmission medium
unshielded twisted pair
(2 x 1.5 mm
2
) for data and
auxiliary power
Cables and connections
Contacting of the
AS-Interface cable using
insulation displacement
Max. cable length
100 m without Repeater/Extender;
200 m with Extension Plug;
300 m with Repeater or Extender;
600 m with Repeater/Extender
and Extension Plug (repeaters
connected in parallel)
Max. cycle time
5 ms at maximum capacity,
10 ms if A/B method is used,
profile-specific with spec 3.0
slaves;
Number of stations per AS-Interface
segment
31 slaves acc. to AS-Interface
spec. V2.0 ;
62 slaves (A/B method) in
accordance with AS-Interface
spec. V2.1 and V3.0
integrated analog value
transmission
Number of binary sensors/actuators
max. 124 I/124 O
acc. to spec. V2.0;
max. 248 I /186 O
acc. to spec. V2.1;
max. 496 I /496 O
acc. to spec. 3.0
Access methods
Cyclic polling master/slave
procedure, cycle data reception
by host (PLC, PC)
Error protection
Identification and resending of
faulty messages