Siemens Simatic S7 Series User Manual

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Further Expansion The PLC program can be further expanded to accommodate a
wide variety of commercial and industrial applications.
Start/Stop pushbuttons, selector switches, indicator lights, and
signaling columns can be added. Motor starters can be added
for control of additional motors. Over-travel limit switches can
be added along with proximity switches for sensing object
position. Various types of relays can be added to expand the
variety of devices being controlled.
As needed, expansion modules can be added to further
increase the I/O capability. The applications are only limited by
the number of I/Os and amount of memory available for the
PLC.
SF/DIAG
Indicator Lights
Signaling
Column
Relays Motor Starters
Pushbuttons Proximity Switches
Selector
Switch
Limit Switches
Discrete Ouputs
Discrete Inputs
Expansion Module
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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.