The As-I Cable - Siemens simatic c7-621 Hardware Installation Manual

5.2

The AS-i Cable

Overview
The AS-i cable (a profile 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
special profile of the cable prevents polarity reversal when connecting nodes.
Attaching to the Attachments are made to the AS-i cable using the penetration technique.
AS-i Cable Contacts penetrate the rubberized jacket and make contact to the two cores.
This guarantees a low transition resistance and a reliable data connection.
The cable does not need to be cut, stripped or screwed. To attach to the
network, there are coupling modules that use the penetration technique.
Figure 5-2
The jacket of the AS-i cable is rubber. If it becomes necessary to move
modules after they have been connected to the AS-i cable, this can be done
without any problem. The AS-i cable is self-healing. This means that the
holes made by the contacts penetrating the jacket close automatically and
re-establish degree of protection IP67. When the cable is installed in an AS-i
module, the cable seals the cable inlets. This allows degree of protection
IP67 to be achieved.
Using Other 2-Wire
Apart from the special AS-i cable, any 2-wire cable with a cross-section of
Cables
2 x 1.5 mm
change from the special AS-i cable to another cable (for example a standard
round cable), there is a special module without integrated electronics
available (transition from the AS-i cable to four M12 terminals and transition
from the AS-i cable to one M12 terminal).
Operation and
How to use the AS-i CP and the meaning of the displays on the AS-i module
Display Elements
are described in Volume 2 Section 6.4.
C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C621-01
10 mm
6,5 mm
Cross-Section of the Cable
2
can be used. Shielding or twisting is not necessary. For the
Attaching a C7-621 AS-i
2
). The
4 mm
5-3