Siemens S7-1200 - CM 1243-2 AS-I Master; Technical Data for the AS-I Master CM 1243-2

Technical specifications
A.14 Communication interfaces
S7-1200 Programmable controller
970 System Manual, 03/2014, A5E02486680-AG
Technical specifications of the flat antenna ANT794-3M
Order number
6NH9870-1AA00
Mobile wireless networks
GSM 900
GSM 1800/1900
Frequency ranges
890 - 960 MHz
1710 - 1990 MHz
Standing wave ratio (VSWR)
≤ 2:1
≤ 1,5:1
Return loss (Tx)
≈ 10 dB
≈ 14 dB
Antenna gain
0 dB
Impedance
50 ohms
Max. power
10 W
Antenna cable
HF cable RG 174 (fixed) with SMA male connector
Cable length
1.2 m
Degree of protection
IP64
Permitted temperature range
-40°C to +75°C
Flammability
UL 94 V2
External material
ABS Polylac PA-765, light gray (RAL 7035)
Dimensions (W x L x H) in mm
70.5 x 146.5 x 20.5
Weight
130 g
A.14.3
CM 1243-2 AS-i master
A.14.3.1
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
Order 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 CM
1243-2 (Page 971)
Conductor cross-section
0.2 mm² (AWG 24) ... 3.3 mm² (AWG 12)
ASI connector tightening torque
0.56 Nm
Permissible ambient conditions