Rs485/Rs232 Signal Boards; Sb Rs485/Rs232 Specifications - Siemens SIMATIC S7 System Manual

A.8

RS485/RS232 signal boards

A.8.1

SB RS485/RS232 specifications

Table A- 148 General specifications
Technical data
Article number
Dimensions W x H x D (mm)
Weight
Power dissipation
Current consumption (5 V DC)
Current consumption (24 V DC)
Table A- 149 RS485 Transmitter and receiver
Technical data
Common mode voltage range
Transmitter differential output
voltage
Termination and bias
Receiver input impedance
Receiver threshold/sensitivity
Isolation
RS 485 signal to chassis ground
RS485 signal to CPU logic
common
Cable length, shielded
S7-200 SMART
System Manual, V2.3, 07/2017, A5E03822230-AF
SB RS485/RS232
6ES7288-5CM01-0AA0
35 x 52.2 x 16
18.2 grams
0.5 W
50 mA
N/A
SB RS485/RS232
-7 V to +12 V, 1 second, 3 VRMS continuous
2 V min. at RL = 100 Ω
1.5 V min. at RL = 54 Ω
4.7 K Ω to +5 V on TXD
4.7 K Ω to GND on RXD
12 K Ω min.
+/- 0.2 V min. 60 mV typical hysteresis
None
With isolated repeater: 1000 m up to 187.5 Kbps
Without isolated repeater: 50 m
Technical specifications
A.8 RS485/RS232 signal boards
771