SIEMENS
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Siemens IK PI · 2015
AS-Interface
Masters
Masters for SIMATIC S7
CM 1243-2
4
■
Benefits
•
More flexibility and versatility in the use of SIMATIC S7-1200 as
the result of a significant increase in the number of digital and
analog inputs/outputs available
•
Very easy configuration and diagnostics of the AS-Interface
via the TIA Portal (STEP 7 V11+ SP2 or higher)
•
No need for the AS-i power supply unit with AS-i Power24V:
The AS-Interface cable is supplied through an existing 24 V
DC PELV power supply unit. For decoupling, the AS-i DCM
1271 data decoupling module is required, see page
4/142.
•
LEDs for indication of fault statuses for fast diagnostics
•
Monitoring of AS-Interface voltage facilitates diagnostics
■
Application
The CM 1243-2 is the AS-Interface master connection for the
12xx CPUs of the SIMATIC S7-1200. Connection to the
AS-Interface greatly increases the number of inputs and outputs
available for S7-1200 (max. 496 DI/496 DO on the AS-Interface
per CM).
The integrated analog value processing also makes the analog
values available at the AS-Interface for the S7-1200 (per CM
up to 31 standard analog slaves, each with up to 4 channels, or
up to 62 A/B analog slaves, each with up to 2 channels).
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Selection and ordering data
■
Accessories
■
More information
Manual "AS-i Master CM 1243-2 and AS-i Data Decoupling
Module DCM 1271 for SIMATIC S7-1200" see
.
Version
Article No.
3RK7243-2AA30-0XB0
CM 1243-2 communication modules
3RK7243-2AA30-0XB0
• AS-Interface masters for SIMATIC S7-1200
• Corresponds to AS-Interface Specification V3.0
• Dimensions (W
H
D / mm): 30
100
75
Version
Article No.
5-pole screw terminals
for AS-i master CM 1243-2 and AS-i DCM 1271 data decoupling module
• With screw terminals
3RK1901-3MA00
© Siemens AG 2014