Cm 1241 Rs232 Specifications - Siemens SIMATIC S7 System Manual

Table A- 160 RS485 connector (female)
Pin
1 Not connected
2 Not connected
3 TxD+ Signal B (RxD/TxD+): Input/Output
4 RTS Request to send (TTL level): Output
1
5 GND Logic or communication ground
The RTS is a TTL level signal and can be used to control another half duplex device based on this signal. It is enabled
1
when you transmit and is disabled all other times. Unlike with the CM 1241 RS232, there is no user control of this signal
on the CM 1241 RS485. You cannot set it manually or cause it to be extended.
A.10.4.3

CM 1241 RS232 Specifications

Table A- 161 General specifications
Technical data
Order number
Dimensions
Weight
Table A- 162 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
Flow control
Wait time
S7-1200 Programmable controller
System Manual, 11/2011, A5E02486680-05
Description Connector Pin
(female)
6 PWR
7
8 TXD-
9
SHELL
CM 1241 RS232
6ES7 241-1AH30-0XB0
30 x 100 x 75 mm
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
+/- 30VDC 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
Hardware, software
0 to 65535 ms
553BTechnical specifications
A.10 Communication interfaces
Description
+5V with 100 ohm series resistor: Output
Not connected
Signal A (RxD/TxD-): Input/Output
Not connected
Chassis ground
755