Siemens 6AV6651-7KA01-3AA4 - S7-1200 + KTP400 Basic Starter Kit 6AV6651-7KA01-3AA4 User Manual
Product codes
6AV6651-7KA01-3AA4
Technical specifications
A.9 Communication interfaces
Easy Book
338
Manual, 03/2014, A5E02486774-AF
Table A- 71 RS485 or RS422 connector (female)
Pin
Description
Connector
(female)
Pin
Description
1
Logic or communication ground
6 PWR
+5 V with 100 ohm series resistor: Output
2 TxD+
1
Connected for RS422
Not used for RS485: Output
7
Not connected
3 TxD+
Signal B (RxD/TxD+): Input/Output
8 TXD-
Signal A (RxD/TxD-): Input/Output
4 RTS
2
Request to send (TTL level) Output
9 TXD-
1
Connected for RS422
Not used for RS485: Output
5 GND
Logic or communication ground
SHELL
Chassis ground
1
Pins 2 and 9 are only used as transmit signals for RS422.
2
The RTS is a TTL level signal and can be used to control another half duplex device based on this signal. It is active
when you transmit and is inactive all other times.
A.9.4.3
CM 1241 RS232 specifications
Table A- 72 General specifications
Technical data
CM 1241 RS232
Order number
6ES7 241-1AH32-0XB0
Dimensions (mm)
30 x 100 x 75
Weight
150 grams
Table A- 73 Transmitter and receiver
Technical data
CM 1241 RS232
Type
RS232 (full-duplex)
Transmitter output voltage
+/- 5 V min. at R
L
= 3K Ω
Transmit output voltage
+/- 15 VDC max.
Receiver input impedance
3 K Ω min.
Receiver threshold/sensitivity
0.8 V min. low, 2.4 max. high
0.5 V typical hysteresis
Receiver input voltage
+/- 30 VDC max.
Isolation
RS 232 signal to chassis ground
RS 232 signal to CPU logic common
500 VAC, 1 minute
Cable length, shielded
10 m max.
Baud rate
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,
Parity
No parity (default), even, odd, Mark (parity bit always set to 1),
Space (parity bit always set to 0)
Number of stop bits
1 (default), 2