Siemens Simatic S7 Series User Manual

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Optional Cartridges S7-200 CPUs support an optional
memory cartridge that
provides portable EEPROM storage for the user program. The
cartridge can be used to copy a program from one S7-200 PLC
to a like S7-200 PLC. Two memory cartridge sizes are available,
64k and 256k bytes.
Two other cartridges are also available. A
real-time clock with
battery is available for use on the CPU 221 and CPU 222. (CPU
224, CPU 224XP, CPU 224XPsi, and CPU 226 have a real-time
clock built in.) The battery provides up to 200 days of data
retention time in the event of a power loss. Another cartridge is
available with a
back-up battery only.
SF/D
IA
G
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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.