The compact CPU 1212C has:

• Integrated power supply, either as wide-range AC or DC power supply (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, 24 V DC.
• 2 integrated analog inputs 0 ... 10 V.
• 2 pulse outputs (PTO) with a frequency of up to 100 MHz.
• 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 configurable 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. RS485 or RS232.
• 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.