Siemens SIMATIC S7-1200

Technical specifications
A.16 Communication interfaces
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
1539
Technical data
Dimensions and weights
Width
Height
Depth
30 mm
100 mm
75 mm
Weight
Net weight
Weight including packaging
122 g
159 g
A.16.3.2
Electrical connections of the AS-i master
Power supply of the AS-i master CM 1243-2
The AS-i master CM 1243-2 is supplied over the communications bus of the S7-1200. This
means that a diagnostics message can still be sent to the S7-1200 following failure of the
AS-i supply voltage. The connection to the communications bus is on the right-hand side of
the AS-i master CM 1243-2.
AS-Interface terminals
The removable terminal for connecting the AS-i cable is located behind the lower cover on
the front of the AS-i master CM 1243-2.
If the AS-i shaped cable is used, you can recognize the correct polarity of the cable by
means of the symbol
Information on how to remove and re-install the terminal block can be found in the
Installation chapter (Page 68).