Cm 1241 Rs485 Specifications - Siemens SIMATIC S7 System Manual
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553BTechnical specifications
A.10 Communication interfaces
A.10.4.2
CM 1241 RS485 Specifications
Table A- 157 General specifications
Technical data
Order number
Dimensions
Weight
Table A- 158 Transmitter and receiver
Technical data
Type
Common mode voltage range
Transmitter differential output voltage
Termination and bias
Receiver input impedance
Receiver threshold/sensitivity
Isolation
RS485 signal to chassis ground
RS485 signal to CPU logic common
Cable length, shielded
Baud rate
Parity
Number of stop bits
Flow control
Wait time
Table A- 159 Power supply
Technical data
Power loss (dissipation)
From +5 VDC
754
CM 1241 RS485
6ES7 241-1CH30-0XB0
30 x 100 x 75 mm
150 grams
CM 1241 RS485
RS485 (2-wire half-duplex)
-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
5.4K Ω min. including termination
+/- 0.2 V min., 60 mV typical hysteresis
500 VAC, 1 minute
1000 m max.
300 baud, 600 baud, 1.2 kbits, 2.4 kbits, 4.8 kbits, 9.6 kbits (default),
19.2 kbits, 38.4 kbits, 57.6 kbits, 76.8 kbits, 115.2 kbits,
No parity (default), even, odd, Mark (parity bit always set to 1),
Space (parity bit always set to 0)
1 (default), 2
Not supported
0 to 65535 ms
CM 1241 RS485
1.1 W
220 mA
S7-1200 Programmable controller
System Manual, 11/2011, A5E02486680-05
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