Siemens Simatic S7 Series System Manual

Technical specifications
A.8 RS485/RS232 signal boards
S7-200 SMART
644 System Manual, 09/2015, A5E03822230-AC
A.8
RS485/RS232 signal boards
A.8.1
SB RS485/RS232 specifications
Table A- 140 General specifications
Technical data
SB RS485/RS232
Article number
6ES7 288-5CM01-0AA0
Dimensions W x H x D (mm) 35 x 52.2 x 16
Weight
18.2 grams
Power dissipation 0.5 W
Current consumption (5 V DC)
50 mA
Current consumption (24 V DC)
N/A
Table A- 141 RS485 Transmitter and receiver
Technical data
SB RS485/RS232
Common mode voltage range
-7 V to +12 V, 1 second, 3 VRMS continuous
Transmitter differential output
voltage
2 V min. at RL = 100 Ω
1.5 V min. at RL = 54 Ω
Termination and bias 4.7 K Ω to +5 V on TXD
4.7 K Ω to GND on RXD
Receiver input impedance
12 K Ω min.
Receiver threshold/sensitivity
+/- 0.2 V min. 60 mV typical hysteresis
Isolation
RS 485 signal to chassis ground
RS485 signal to CPU logic
common
None
Cable length, shielded With isolated repeater: 1000 m up to 187.5 kbaud
Without isolated repeater: 50 m

Siemens Simatic S7 Series Specifications

General

CPU	Varies by model (e.g., S7-300, S7-400, S7-1200, S7-1500)
Communication Interfaces	PROFIBUS, PROFINET, Ethernet, MPI
Programming	TIA Portal, STEP 7
Programming Languages	LAD, FBD, STL, SCL, GRAPH
I/O Modules	Digital, Analog, Specialty modules available
Operating Temperature	0°C to 60°C (standard models)
Mounting	DIN rail mounting
Operating Voltage	24V DC or 120/230V AC (varies by model)
Protection Class	IP20 (standard models)
Memory	Varies depending on the S7 model. Includes work memory (RAM) for program execution, load memory (EEPROM or Flash) for program storage, and system memory for operating system functions. Memory sizes range from kilobytes to megabytes.