Rs232, Rs422, And Rs485; Cb 1241 Rs485 Specifications - Siemens S7-1200 System Manual
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Also See for S7-1200:
- Operating instructions manual (132 pages) ,
- Programming manualline (74 pages) ,
- Manual (46 pages)
Table of Contents
A.14.4
RS232, RS422, and RS485
A.14.4.1
CB 1241 RS485 specifications
Note
To use this CB, your CPU firmware must be V2.0 or higher.
Table A- 245 General specifications
Technical data
Order number
Dimensions W x H x D (mm)
Weight
Table A- 246 Transmitter and receiver
Technical data
Type
Common mode voltage range
Transmitter differential output voltage
Termination and bias
Optional termination
Receiver input impedance
Receiver threshold/sensitivity
Isolation
RS485 signal to chassis ground
RS485 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, 03/2014, A5E02486680-AG
CB 1241 RS485
6ES7 241-1CH30-1XB0
38 x 62 x 21
40 grams
CB 1241 RS485
RS485 (2-wire half-duplex)
-7 V to +12 V, 1 second, 3 VRMS continuous
2 V min. at R
= 100 Ω
L
1.5 V min. at R
= 54 Ω
L
10K to +5 V on B, RS485 Pin 3
10K to GND on A, RS485 Pin 4
Short Pin TB to Pin T/RB, effective termination impedance is 127 Ω,
connects to RS485 Pin 3
Short Pin TA to Pin T/RA, effective termination impedance is 127 Ω,
connects to RS485 Pin 4
5.4K Ω min. including termination
+/- 0.2 V min., 60 mV typical hysteresis
500 VAC, 1 minute
1000 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
Not supported
0 to 65535 ms
Technical specifications
A.14 Communication interfaces
973
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