Cm 1241 Rs422/485 Specifications - Siemens SIMATIC S7 System Manual
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553BTechnical specifications
A.10 Communication interfaces
Table A- 163 Power supply
Technical data
Power loss (dissipation)
From +5 VDC
Table A- 164 RS232 connector (male)
Pin
1 DCD
Data carrier detect: Input
2 RxD
Received data from DCE: Input
3 TxD
Transmitted data to DCE: Output
4 DTR
Data terminal ready: Output
5 GND
Logic ground
A.10.4.4
CM 1241 RS422/485 Specifications
CM 1241 RS422/485 Specifications
Table A- 165 General specifications
Technical data
Order number
Dimensions
Weight
Table A- 166 Transmitter and receiver
Technical data
Type
Common mode voltage range
Transmitter differential output voltage
Termination and bias
Receiver input impedance
756
Description
CM 1241 RS232
1.1 W
220 mA
Connector
Pin
(male)
6 DSR
7 RTS
8 CTS
9 RI
SHELL
CM 1241 RS422/485
6ES7 241-1CH31-0XB0
30 x 100 x 75 mm
155 grams
CM 1241 RS422/485
RS422 or RS485, 9-pin sub D female connector
-7 V to +12 V, 1 second, 3 VRMS continuous
2 V min. at R
= 100 Ω
L
1.5 V min. at R
= 54 Ω
L
10K Ω to +5 V on B, PROFIBUS Pin 3
10K Ω to GND on A, PROFIBUS Pin 8
Internal bias options provided, or no internal bias. In all cases,
external termination is required (
Protocols, page xxx)
5.4K Ω min. including termination
Description
Data set ready: Input
Request to send: Output
Clear to send: Input
Ring indicator (not used)
Chassis ground
see Chapter 12, Communcations
S7-1200 Programmable controller
System Manual, 11/2011, A5E02486680-05
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- Introducing the S7-1200 Plc
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