CPU 1212C

Danh mục:


  • Controller for intro to S7 with basic expansion options
  • Expandable by:
    • 1 signal board (SB), battery board (BB) or communication board (CB)
    • 2 signal modules (SM)
    • Max. 3 communication modules (CM)


The compact CPU 1212C has:

  • 3 device versions with different power supply and control voltages.
  • Integrated power supply either as wide-range AC or DC power supply (85 … 264 V AC or 24 V DC)
  • Integrated 24 V encoder/load current supply:
    For direct connection of sensors and encoders. With 300 mA output current also for use as load power supply.
  • 8 integrated digital inputs 24 V DC (current sinking/current sourcing (IEC type 1 current sinking)).
  • 6 integrated digital outputs, either 24 V DC or relay.
  • 2 integrated analog inputs 0 … 10 V.
  • 2 pulse outputs (PTO) with a frequency of up to 100 kHz.
  • Pulse-width modulated outputs (PWM) with a frequency of up to 100 kHz.
  • Integrated Ethernet interface (TCP/IP native, ISO-on-TCP).
  • 4 fast counters (3 with max. 100 kHz; 1 with max. 30 kHz), with parameterizable enable and reset inputs, can be used simultaneously as up and down counters with 2 separate inputs or for connecting incremental encoders.
  • Expansion by additional communication interfaces, e.g. RS 485 or RS 232.
  • Expansion by analog or digital signals directly on the CPU via signal board (with retention of CPU mounting dimensions).
  • Expansion by a wide range of analog and digital input and output signals via signal modules.
  • Optional memory expansion (SIMATIC Memory Card).
  • PID controller with auto-tuning functionality.
  • Integral real-time clock.
  • Interrupt inputs:
    For extremely fast response to rising or falling edges of process signals.
  • Removable terminals on all modules.
  • Simulator (optional):
    For simulating the integrated inputs and for testing the user program.

Device versions


Supply voltage

Input voltage DI

Output voltage DO

Output current

  • DC/DC/DC

24 V DC

24 V DC

24 V DC

0.5 A, transistor

  • DC/DC/relay

24 V DC

24 V DC

5 … 30 V DC /
5 … 250 V AC

2 A;
30 W DC /
200 W AC

  • AC/DC/relay

85 … 264 V AC

24 V DC

5 … 30 V DC /
5 … 250 V AC

2 A;
30 W DC /
200 W AC


  • Comprehensive instruction set:
    A wide range of operations facilitate programming:

    • basic operations such as binary logic operations, result allocation, save, count, create times, load, transfer, compare, shift, rotate, create complement, call subprogram (with local variables)
    • integral communication commands (e.g. USS protocol, Modbus RTU, S7 communication “T-Send/T-Receive” or Freeport)
    • user-friendly functions such as pulse-width modulation, pulse sequence function, arithmetic functions, floating point arithmetic, PID closed-loop control, jump functions, loop functions and code conversions
    • mathematical functions, e.g. SIN, COS, TAN, LN, EXP
  • Counting:
    User-friendly counting functions in conjunction with the integrated counters and special commands for high-speed counters open up new application areas for the user
  • Interrupt processing:
    • edge-triggered interrupts (activated by rising or falling edges of process signals on interrupt inputs) support a rapid response to process events.
    • time-triggered interrupts.
    • counter interrupts can be triggered when a setpoint is reached or when the direction of counting changes.
    • communication interrupts allow the rapid and easy exchange of information with peripheral devices such as printers or bar code readers
  • Password protection
  • Test and diagnostics functions:
    Easy-to-use functions support testing and diagnostics, e.g. online/offline diagnostics
  • “Forcing” of inputs and outputs during testing and diagnostics:
    Inputs and outputs can be set independently of cycle and thus permanently, for example, to test the user program
  • Motion Control in accordance with PLCopen for simple movements
  • Library functionality


The STEP 7 Basic programming package permits complete programming of all S7-1200 controllers and the associated I/O.

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