CPU 314C-2 PTP Overview

  • The compact CPU with integrated digital and analog inputs/outputs as well as second serial interface
  • For plants with high processing performance and response time requirements
  • With technological functions

CPU 314C-2 PTP Ordering data

SIMATIC Micro Memory Card required for operation of the CPU.

Product No. / Product Description Listprice / Your price
SIMATIC S7-300, CPU 314C-2 PTP Compact CPU with MPI, 24 DI/16 DO, 4 AI, 2 AO, 1 Pt100, 4 high-speed counters (60 kHz), integrated interface RS485, Integr. power supply 24 V DC, work memory 192 KB, Front connector (2x 40-pole) and Micro Memory Card required

The CPU 314C-2 PtP is the compact CPU for systems with demanding requirements regarding processing performance and speed of response. With its extended main memory, this compact CPU is also suitable for medium-sized applications. Integrated digital and analog inputs/outputs permit a direct connection to the process, the second serial interface allows the connection of additional I/O devices such as barcode scanner, printer, etc.

Other possible uses result from the integrated technological functions:

  • Counting
  • Frequency measurement
  • Period measurement
  • Pulse-width modulation
  • PID control
  • Controlled positioning

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Technical specifications

Article number


CPU314C-2PTP, 24DI/16DO/5AI/2AO, 192 KB

General information

HW functional status


Firmware version


Engineering with

  • ● Programming package

STEP 7 as of V5.5 + SP1 or STEP 7 V5.3 + SP2 or higher with HSP 204

Supply voltage

Rated value (DC)

  • ● 24 V DC


permissible range, lower limit (DC)

19.2 V

permissible range, upper limit (DC)

28.8 V

external protection for power supply lines (recommendation)

Miniature circuit breaker, type C; min. 2 A; miniature circuit breaker type B, min. 4 A

Mains buffering

  • ● Mains/voltage failure stored energy time

5 ms

  • ● Repeat rate, min.

1 s

Load voltage L+

Digital inputs

  • — Rated value (DC)

24 V

  • — Reverse polarity protection


Digital outputs

  • — Rated value (DC)

24 V

  • — Reverse polarity protection


Input current

Current consumption (rated value)

660 mA

Current consumption (in no-load operation), typ.

150 mA

Inrush current, typ.

5 A


0.7 A²·s

Digital inputs

  • ● from load voltage L+ (without load), max.

80 mA

Digital outputs

  • ● from load voltage L+, max.

50 mA

Power loss

Power loss, typ.

13 W


Work memory

  • ● integrated

192 kbyte

  • ● expandable


  • ● Size of retentive memory for retentive data blocks

64 kbyte

Load memory

  • ● Plug-in (MMC)


  • ● Plug-in (MMC), max.

8 Mbyte

  • ● Data management on MMC (after last programming), min.

10 y


  • ● present

Yes; Guaranteed by MMC (maintenance-free)

  • ● without battery

Yes; Program and data

CPU processing times

for bit operations, typ.

0.06 µs

for word operations, typ.

0.12 µs

for fixed point arithmetic, typ.

0.16 µs

for floating point arithmetic, typ.

0.59 µs


Number of blocks (total)

1 024; (DBs, FCs, FBs); the maximum number of loadable blocks can be reduced by the MMC used.

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