Siemens SIMATIC S7 System Manual page 753

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Technical data

Number of stop bits

Flow control

Table A- 156 Power supply

Technical data

Power loss (dissipation)

Current consumption (SM Bus), max.

Current consumption (24 VDC) max.

CB 1241 RS485 (6ES7 241-1CH30-1XB0)

devices on the RS485 network.)

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).

S7-1200 Programmable controller

System Manual, 11/2011, A5E02486680-05

Connect "TA" and TB" as shown to terminate the network. (Terminate only the end

Use shielded twisted pair cable and connect the cable shield to ground.

CB 1241 RS485

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

CB 1241 RS485

553BTechnical specifications

A.10 Communication interfaces

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Simatic s7-1200