Technical data

Further AS-i System Components
3-2
SIMATIC NET AS-Interface – Introduction and Basic Information
C79000-G8976-C089/03
3.1 The AS-i Cable
Design and Advantages
The AS-i cable (shaped cable) allows simple and fast installation of an AS-i
system. The AS-i cable is a rubberized 2-wire cable (2 x 1.5 mm
2
). The profile
section prevents stations being connected with incorrect polarity.
The AS-i cable is contacted using the penetration technique. Contact blades
penetrate the rubber jacket and make contact with the two wires. This
guarantees a low contact resistance and
ensures a reliable data connection. The cable
does not need to be cut, have its insulation
removed or be screwed down. For this type of
connection, there are coupling modules
designed for the penetration technique.
The jacket of the AS-i cable is rubber. If modules need to be moved after they
have been connected to the AS-i cable this is possible without causing any
problems. The AS-i cable is “self-healing”. This means that the holes made by the
contact blades in the rubber jacket of the cable close themselves and revert to the
type of protection IP67. When the cable is installed in an AS-i module, the cable
seals the openings. The type of protection IP67 is therefore achieved.
Use of Other 2-Wire Cables
Apart from the special AS-i cable, any 2-wire cable with a cross-section of 2 x 1.5
mm
2
can be used. Shielding or twisting is not necessary. For the transition from
the special AS-i cable to a different cable (e.g. a standard round cable) there is a
special module available without integrated electronics (transition from the AS-i
cable to four M12 connectors and transition from the AS-i cable to one M12
connector).
10 mm
6,5 mm
4 mm