Network Extension - Siemens SIMATIC ET200SP Function Manual

Introduction
3.1 AS-Interface
3.1.5

Network extension

Figure 3-2
An AS-i line can be up to 100 m long without additional components. Repeaters can be used
to increase the maximum possible cable length. Two repeaters can be connected in series,
which can extend the network to 300 m as a linear structure. A separate AS-i power supply
unit must be provided in each new segment.
Figure 3-3
An extension plug can be used to double the length of an AS-i line to 200 m. Repeaters
cannot be connected in series when they are used in conjunction with AS-i extension plugs. A
maximum distance of 400 m between the master and slave and a total cable extension of
600 m can be achieved by using 2 repeaters and one extension plug per segment (master in
the middle of the network). Repeaters can be connected in parallel in a star configuration,
each with up to 200 m long segments.
Figure 3-4
14
Network extension – previously a maximum of 100 m per segment
Network extension - now with AS-i extension plug, max. 200 m per segment
The maximum network extension with an AS-i extension plug is 200 m per segment, with
only one repeater connected in series between master and any slave.
Safety engineering with AS‑Interface in the SIMATIC ET 200SP, including typical circuit diagram
Function Manual, 08/2020, A5E44991382002A/RS-AB/002