553BTechnical specifications
A.10 Communication interfaces
S7-1200 Programmable controller
System Manual, 11/2011, A5E02486680-05
753
Technical data
CB 1241 RS485
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
Flow control
Not supported
Wait time
0 to 65535 ms
Table A- 156 Power supply
Technical data
CB 1241 RS485
Power loss (dissipation)
1.5 W
Current consumption (SM Bus), max.
50 mA
Current consumption (24 VDC) max.
80 mA
CB 1241 RS485 (6ES7 241-1CH30-1XB0)
①
Connect "TA" and TB" as shown to terminate the network. (Terminate only the end
devices on the RS485 network.)
②
Use shielded twisted pair cable and connect the cable shield to ground.
You terminate only the two ends of the RS485 network. The devices in between the two end
devices are not terminated or biased. See the section on "Biasing and terminating an RS485
network connector" (Page 530).