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Siemens 6ES7312-1AE14-0AB0 — PLCs (Programmable Logic Controllers)

6ES7312-1AE14-0AB0 S7-300 CPU 312, 64 I/O, MPI

MPN6ES7312-1AE14-0AB0
End of Life

Siemens SIMATIC S7-300 CPU 312, order code 6ES7312-1AE14-0AB0, 64 DI/DO, MPI, RS485, 8 SFBs, programmable in LAD, FBD, SCL, STL, GRAPH, HiGraph.

$133.33Ref. price · indicative, final on quote
Siemens 6ES7312-1AE14-0AB0 datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

6ES7312-1AE14-0AB0 — I/O
ParameterValue
Digital inputs0
Digital outputs0
ExpandableNo
Input data area64
Output data area64
6ES7312-1AE14-0AB0 — Processor & Memory
ParameterValue
Execution time, bit operations (typ.)0.1 µs
Execution time, word operations (typ.)0.24 µs
Execution time, floating-point arithmetic (typ.)1.1 µs
Size, max.256 byte
6ES7312-1AE14-0AB0 — Programming
ParameterValue
Programming language: FBDYes
Programming language: LADYes
Programming language: SCLYes
6ES7312-1AE14-0AB0 — Electrical
ParameterValue
Rated value (DC)24 V
Current consumption (rated)650 mA
Permissible range, lower limit (DC)19.2 V
Permissible range, upper limit (DC)28.8 V
Power loss (typ.)4 W
6ES7312-1AE14-0AB0 — Environmental
ParameterValue
Temperature, min.0 °C
Temperature, max.60 °C
6ES7312-1AE14-0AB0 — Mechanical
ParameterValue
Width40 mm
Height125 mm
Depth130 mm
Weight (approx.)270 g
6ES7312-1AE14-0AB0 — Communication
ParameterValue
Interface typeIntegrated RS 485 interface

Product details

What this CPU brings to the panel

The 6ES7312-1AE14-0AB0 is a SIMATIC S7-300 CPU with 64 digital inputs and 64 digital outputs, MPI and RS485 interfaces, and supports programming in LAD, FBD, SCL, STL, GRAPH, and HiGraph. It includes 8 integrated SFBs.

Key specs that matter

The 8 SFBs (Type: SFB) handle common control tasks without extra coding. MPI (Multi-Point Interface) lets you link an HMI or another CPU; the separate RS485 port covers PROFIBUS or point-to-point talk. Operating range of 0 to 60 °C keeps it working in a typical cabinet, even sitting near hot drives.

Integration notes

Mounts on a standard S7-300 DIN-rail profile. Dimensions: 40 mm wide, 125 mm high, 130 mm deep. Power comes from the backplane bus; the CPU is isolated from the I/O side.

Frequently asked questions

What does the FM 8 spec mean?

It means the CPU has 8 integrated system function blocks (SFB) for routines like diagnostics or communication without extra code.

Does this CPU support FBD programming?

Yes, FBD (Function Block Diagram) is supported, along with LAD, SCL, STL, GRAPH, and HiGraph.

What are the digital I/O counts?

It supports 64 digital inputs and 64 digital outputs.

What communication interfaces does it have?

It has an MPI port and an RS485 interface. Extended communication is possible via CP modules (up to 4 CP LAN, 8 CP PtP).

MPN
6ES7312-1AE14-0AB0