Cm 1241 Rs232 Specifications - Siemens SIMATIC S7-1200 Manual

Technical specifications
A.9 Communication interfaces
Table A- 71 RS485 or RS422 connector (female)
Pin Description
1 Logic or communication ground
2 TxD+ Connected for RS422
1
Not used for RS485: Output
3 TxD+ Signal B (RxD/TxD+): Input/Output
4 RTS Request to send (TTL level) Output
2
5 GND Logic or communication ground
Pins 2 and 9 are only used as transmit signals for RS422.
1
The RTS is a TTL level signal and can be used to control another half duplex device based on this signal. It is active
2
when you transmit and is inactive all other times.
A.9.4.3

CM 1241 RS232 specifications

Table A- 72 General specifications
Technical data
Order number
Dimensions (mm)
Weight
Table A- 73 Transmitter and receiver
Technical data
Type
Transmitter output voltage
Transmit output voltage
Receiver input impedance
Receiver threshold/sensitivity
Receiver input voltage
Isolation
RS 232 signal to chassis ground
RS 232 signal to CPU logic common
Cable length, shielded
Baud rate
Parity
Number of stop bits
338
Connector Pin
(female)
6 PWR
7
8 TXD-
9 TXD-
SHELL
CM 1241 RS232
6ES7 241-1AH32-0XB0
30 x 100 x 75
150 grams
CM 1241 RS232
RS232 (full-duplex)
+/- 5 V min. at R = 3K Ω
L
+/- 15 VDC max.
3 K Ω min.
0.8 V min. low, 2.4 max. high
0.5 V typical hysteresis
+/- 30 VDC max.
500 VAC, 1 minute
10 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
Description
+5 V with 100 ohm series resistor: Output
Not connected
Signal A (RxD/TxD-): Input/Output
Connected for RS422
1
Not used for RS485: Output
Chassis ground
Manual, 03/2014, A5E02486774-AF
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