Specifications

AS-Interface
System components and accessories
Extension plugs
6/150
Siemens IK PI · 2009
6
■ Overview
With the extension plug / extension plug plus it is possible to
double the cable length possible in an AS-Interface segment
from 100 to 200 m.
The extension plug / extension plug plus is a passive component
which is connected to that point of the AS-Interface network that
is furthest away from the power supply. It has an M12 plug for
quick connection to the AS-Interface M12 feeder with degree of
protection IP67.
Only one power supply unit is needed to supply power to the
slaves on the up to 200 m long segment.
The extension plug / extension plug plus has integrated under-
voltage detection for monitoring the AS-Interface voltage in
order to be sure that the necessary voltage still exists at the end
of the bus cable. Undervoltage is signaled on the extension plug
by means of a diagnostics LED. The extension plug plus is
equipped with an AS-Interface slave and communicates this
diagnostics information directly to the AS-Interface master.
■ Benefits
• Doubling of the cable length from 100 to 200 m per AS-
Interface segment
• More possibilities of use and greater freedom for plant
planning through doubling of the AS-Interface segment
• Notable reduction of network infrastructure costs for large
networks
• Enables in combination with repeaters a maximum range of up
to 600 m for AS-Interface networks (for details, see section
Configuration in the "Technical Information" LV1 T)
• Easy monitoring through integrated undervoltage detection
■ Design
To construct an AS-Interface segment with a cable length of
more than 100 m and up to a maximum of 200 m, the extension
plug / extension plug plus is installed at that point of the network
which is furthest from the AS-Interface power supply unit. This
point does not have to be localized exactly; it suffices to connect
the extension plug / extension plug plus in its vicinity (approx.
±10 m).
As with all AS-Interface networks, any network structure (line,
tree, star) is possible when using the extension plug / extension
plug plus. Only one extension plug / extension plug plus is
required per 200-m segment even with a tree or star structure.
As a passive network component the extension plug does not
need an AS-Interface address. The extension plug plus has an
integral AS-Interface A/B slave for the diagnostic signal and thus
requires an AS-Interface address. For addressing purposes, the
extension plug plus is simply plugged on the 3RK1 904-2AB01
addressing unit.