Siemens Simatic S7 Series System Manual

References
E.5 Memory ranges and features
S7-200 SMART
704 System Manual, 09/2015, A5E03822230-AC
Description
CPU SR20,
CPU ST20
CPU SR30,
CPU ST30
CPU SR40,
CPU ST40
CPU CR40,
CPU CR60
CPU SR60,
CPU ST60
PID loops
0 to 7
0 to 7
0 to 7
0 to 7
0 to 7
Ports Ethernet pro-
gramming port,
Integrated
RS485 port
(Port 0),
CM01 Signal
Board (SB)
RS232/RS485
port (Port 1)
Ethernet pro-
gramming port,
Integrated
RS485 port (Port
0),
CM01 Signal
Board (SB)
RS232/RS485
port (Port 1)
Ethernet pro-
gramming port,
Integrated
RS485 port
(Port 0),
CM01 Signal
Board (SB)
RS232/RS485
port (Port 1)
Ethernet pro-
gramming port,
Integrated
RS485 port
(Port 0)
Ethernet pro-
gramming port,
Integrated
RS485 port
(Port 0),
CM01 Signal
Board (SB)
RS232/RS485
port (Port 1)
1
LB60 to LB63 are reserved by STEP 7-Micro/WIN SMART when programming in LAD or FBD.

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.