SIEMENS
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Siemens IC 10 · 2017
* You can order this quantity or a multiple thereof.
Illustrations are approximate
AS-Interface
Masters
Masters for SIMATIC S7
CM 1243-2
2
■
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 2/87
.
•
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 four channels, or
up to 62 A/B analog slaves, each with up to two channels).
Operating conditions
•
The CM 1243-2 communication module exchanges data with
the S7-1200 CPU with a cycle time of 10 ms.
•
The AS-i cycle time depends on the AS-i bus capacity and is up
to 5 ms in the case of 31 standard slaves; for more information,
see Manual "AS-i Master CM 1243-2 and AS-i DCM 1271 Data
Decoupling Module for SIMATIC S7-1200" ,
•
For calculation of the maximum switching frequency at
inputs/outputs of AS-i slaves, these cycle times and the
runtime of the user program must be added up.
■
Selection and ordering data
■
Accessories
■
More information
Version
SD
Screw terminals
PU
(UNIT,
SET, M)
PS*
PG
d
Article No.
Price
per PU
3RK7243-2AA30-0XB0
CM 1243-2 communication module
2
3RK7243-2AA30-0XB0
1
1 unit
42C
• AS-Interface masters for SIMATIC S7-1200
• Corresponds to AS-Interface Specification V3.0
• With screw terminals, removable terminals
(included in scope of supply)
• Dimensions (W
H
D / mm): 30
100
75
Version
SD
Screw terminals
PU
(UNIT,
SET, M)
PS*
PG
d
Article No.
Price
per PU
5-pin screw terminal (spare part)
• for AS-i master CM 1243-2 and AS-i DCM 1271 data
decoupling module
• With screw terminals
5
3RK1901-3MA00
1
1 unit
42C
More information
Manuals,
see
© Siemens AG 2016