Siemens SIMATIC S7-1200

Technical specifications
A.16 Communication interfaces
S7-1200 Programmable controller
1538 System Manual, V4.2, 09/2016, A5E02486680-AK
A.16.3
CM 1243-2 AS-i master
A.16.3.1
Technical data for the AS-i master CM 1243-2
Table A- 244 Technical data for the AS-i master CM 1243-2
Technical data
Article number
3RK7243-2AA30-0XB0
Firmware version V1.0
Date
01.12.2011
Interfaces
Maximum current consumption
From the S7-1200 backplane bus
From the AS-i cable
Max. 250 mA,
supply voltage S7-1200 communication bus 5 V DC
Max. 100 mA
Maximum current carrying capacity between the
ASI+/ASI- terminals
8 A
Pin assignment See section Electrical connections of the AS-i master
(Page 1539)
Conductor cross-section
0.2 mm² (AWG 24) ... 3.3 mm² (AWG 12)
ASI connector tightening torque
0.56 Nm
Permissible ambient conditions
Ambient temperature
During storage
During transport
During the operating phase, with vertical installation (hori-
zontal standard mounting rail)
During the operating phase, with horizontal installation (ver-
tical standard mounting rail)
-40 °C ... 70 °C
-40 °C ... 70 °C
0 °C ... 55 °C
0 °C ... 45 °C
Relative humidity at 25 °C during operating phase, no con-
densation, maximum
95 %
Degree of protection
IP20
Power supply, current consumption, power loss
Type of power supply DC
Current consumption (typically)
From the S7-1200 backplane bus
200 mA
Total power loss (typical):
• From the S7-1200 backplane bus
• From AS-i cable
1 W
2.4 W