Siemens Simatic S7 Series User Manual

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An optional
fan-out connector allows field wiring connections
to remain fixed when removing or replacing a CPU 221 or
CPU 222. The appropriate connector slides into either the input,
output, or expansion module terminals.
Optional Fan-out Connector
for CPU 221 or CPU 222
Field Wiring
Connector Posts
CPU 224, CPU 224XP, and CPU 226
Removeable Terminal Strip
CPU 224, CPU 224XP, CPU 224XPsi, and CPU 226 do not have
an optional fan-out connector. Instead, their terminal strips are
removable.
Super Capacitor A super capacitor, so named because of its ability to maintain
a charge for a long period of time, protects data stored in RAM
in the event of a power loss.
The RAM memory is typically backed up for 50 hours on the
CPU 221 and CPU 222 and for 100 hours on the CPU 224, CPU
224 XP, CPU 224 XPsi, and CPU 226.
Executed
Program
Current
Data
Memory
Bits,
Timers,
Counters
Program
Backup
Program
and
Parameters
Parameters
RAM
(Volatile)
EEPROM
(Non-volitle)
Optional EEPROM
Memory Cartridge
(Non-volatile)
Super Capacitor
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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.