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SIMATIC S7-300
Modular Siemens controller removed from the portfolio on 1 October 2025 and supplied only as spare parts and repair; the recommended successor is S7-1500
Price and delivery time are given after a technical review.
Production status: Discontinued
Siemens discontinued S7-300 and ET 200M on 1 October 2025 (status PM410, 'Product Removed from Portfolio'). Since then only spare parts and repair are supplied, some parts on an exchange-only basis, and nothing is delivered for expansion or new systems. End of production and sales (PM490) is 1 October 2033, and beyond that only under a separate long-term agreement. The recommended successor is S7-1500 with ET 200MP or ET 200SP; S7-400 and ET 200SP HA (for process automation) are also named. Note that the S7-400 itself was announced for phase-out on 1 October 2026, so it is not a sound choice for a new system. Check the status of each code before buying.
Checked on Nov 2, 2026
A suggested successor is not an exact equivalent; the right model depends on your application.
SIMATIC S7-300 is Siemens' modular controller, used in industrial applications worldwide for many years. It is built from a CPU, a power supply (PS 307), signal modules (SM 321, 322, 331, 332 and others) and interface modules (IM 360 and IM 361), mounted in a single rack or several racks. The PN/DP CPUs support up to 4 racks. All the CPUs researched use a Micro Memory Card.
This family is no longer a current product. According to Siemens' migration page, the S7-300 together with ET 200M was discontinued on 1 October 2025 and moved to status PM410 ('Product Removed from Portfolio'). Since then the parts are supplied only as spare parts or for repair, some on an exchange-only basis, and no new quantities are delivered for expansion or new systems. End of production and sales (PM490) is 1 October 2033; beyond that, supply is possible only under a separate long-term agreement.
Siemens recommends S7-1500 with ET 200MP or ET 200SP as the successor, and also names S7-400 and, for process automation, ET 200SP HA Note that the S7-400 itself was announced for phase-out on 1 October 2026, so it is not a sound choice for a new system.. For ET 200M, signal adapters are offered that let you replace only the controller while the field wiring stays in place. Siemens' migration guide (09/2015) maps each S7-300 CPU to a corresponding S7-1500 CPU.
Work memory of the CPUs ranges from 32 KB (CPU 312) to 2048 KB (CPU 319-3 PN/DP), and the bit instruction time from 0.1 µs to 0.004 µs. The PN/DP CPUs have a PROFINET interface with a two-port switch, and the CPU 319-3 PN/DP has an additional DP interface besides MPI/DP. The fail-safe CPU 317F-2 DP is used with the S7 Distributed Safety package V5.2 SP1 or higher. According to the data sheets the programming software is STEP 7 V5.5 or higher.
| Model | Order code | Code type | Attributes | Request |
|---|---|---|---|---|
| CPU 312CPU ورودی با MPI و منبع تغذیهٔ ۲۴ ولت یکپارچه و حافظهٔ کاری ۳۲ کیلوبایت؛ برگهٔ داده «spare part» است | 6ES7312-1AE14-0AB0 | Exact code |
| Request CPU 312 |
| CPU 313C (24 DI / 16 DO)CPU کامپکت با ۲۴ ورودی و ۱۶ خروجی دیجیتال، ۴ ورودی و ۲ خروجی آنالوگ، یک Pt100 و ۳ شمارندهٔ پرسرعت ۳۰ کیلوهرتز؛ برگهٔ داده «spare part» است | 6ES7313-5BG04-0AB0 | Exact code |
| Request CPU 313C (24 DI / 16 DO) |
| CPU 314CPU استاندارد با MPI و حافظهٔ کاری ۱۲۸ کیلوبایت؛ برگهٔ داده «spare part» است | 6ES7314-1AG14-0AB0 | Exact code |
| Request CPU 314 |
| CPU 314C-2 PN/DPCPU کامپکت با MPI/DP و PROFINET، ۲۴ ورودی و ۱۶ خروجی دیجیتال، ورودی/خروجی آنالوگ، ۴ شمارندهٔ پرسرعت ۶۰ کیلوهرتز؛ برگهٔ داده «spare part» است | 6ES7314-6EH04-0AB0 | Exact code |
| Request CPU 314C-2 PN/DP |
| CPU 315-2 PN/DPCPU با MPI/DP و PROFINET (سوئیچ دوپورتی) و حافظهٔ کاری ۳۸۴ کیلوبایت؛ برگهٔ داده «spare part» است | 6ES7315-2EH14-0AB0 | Exact code |
| Request CPU 315-2 PN/DP |
| CPU 317-2 PN/DPCPU با MPI/DP و PROFINET (سوئیچ دوپورتی) و حافظهٔ کاری ۱ مگابایت؛ برگهٔ داده عنوان «spare part» ندارد | 6ES7317-2EK14-0AB0 | Exact code |
| Request CPU 317-2 PN/DP |
| CPU 317F-2 DPCPU ایمنی (F) با MPI/DP و DP، حافظهٔ کاری ۱٫۵ مگابایت، با بستهٔ S7 Distributed Safety V5.2 SP1 یا بالاتر؛ برگهٔ داده «spare part» است | 6ES7317-6FF04-0AB0 | Exact code |
| Request CPU 317F-2 DP |
| CPU 319-3 PN/DPبزرگ‌ترین CPU خانواده با MPI/DP، DP، PROFINET و حافظهٔ کاری ۲ مگابایت؛ برگهٔ داده «spare part» است | 6ES7318-3EL01-0AB0 | Exact code |
| Request CPU 319-3 PN/DP |
| PS 307 power supply, 5 Aماژول منبع تغذیهٔ PS 307 با جریان خروجی ۵ آمپر | 6ES7307-1EA01-0AA0 | Exact code |
| Request PS 307 power supply, 5 A |
| SM 321 DI 32 x 24 V DCماژول ورودی دیجیتال ۳۲ کاناله ۲۴ ولت | 6ES7321-1BL00-0AA0 | Exact code |
| Request SM 321 DI 32 x 24 V DC |
| SM 322 DO 32 x 24 V DC / 0.5 Aماژول خروجی دیجیتال ۳۲ کاناله ۲۴ ولت با جریان ۰٫۵ آمپر | 6ES7322-1BL00-0AA0 | Exact code |
| Request SM 322 DO 32 x 24 V DC / 0.5 A |
| Siemens statusSiemens status | Discontinued 01.10.2025 (PM410, Product Removed from Portfolio) |
|---|---|
| End of production and sales (PM490)End of production and sales (PM490) | 01.10.2033 |
| Recommended successorsRecommended successors | S7-1500 with ET 200MP / ET 200SP; S7-400; ET 200SP HA (process automation) |
| CPU supply voltageCPU supply voltage | 24 V DC |
|---|---|
| Modules per rack, max. (CPU 315-2 PN/DP)Modules per rack, max. (CPU 315-2 PN/DP) | 8 |
| Racks, max. (PN/DP CPUs)Racks, max. (PN/DP CPUs) | 4 |
| CPU operating temperatureCPU operating temperature | 0 … 60 °C |
| CPU work memoryCPU work memory | 32 (CPU 312) … 2048 (CPU 319-3 PN/DP) KB |
|---|---|
| Bit instruction timeBit instruction time | 0.1 (CPU 312) … 0.004 (CPU 319-3 PN/DP) µs |
| Load memoryLoad memory | Micro Memory Card required |
| CPU 315-2 PN/DP interfacesCPU 315-2 PN/DP interfaces | MPI/DP 12 Mbit/s + PROFINET (2-port switch) |
|---|---|
| Max. DP devices (CPU 315-2 PN/DP)Max. DP devices (CPU 315-2 PN/DP) | 124 |
| Isochronous modeIsochronous mode | Yes (alternatively on PROFIBUS DP or PROFINET) |
| Fail-safe CPUFail-safe CPU | CPU 317F-2 DP with S7 Distributed Safety V5.2 SP1 or higher |
|---|
| CPU widthCPU width | 40 (CPU 312, 314, 315, 317); 120 (CPU 313C, 314C, 319) mm |
|---|
| Programming softwareProgramming software | STEP 7 V5.5 or higher (V5.5 + SP1 for CPU 312, 313C, 314) |
|---|
Power supply modules PS 307 (2 A, 5 A, 10 A)
S7-300 modular power supply; codes 6ES7307-1BA01-0AA0 (2 A), 6ES7307-1EA01-0AA0 (5 A) and 6ES7307-1KA02-0AA0 (10 A) are in the module data manual
Digital modules SM 321, SM 322, SM 323
Digital input and output modules with 8, 16, 32 and 64 channels, in DC and AC voltages
Analog modules SM 331, SM 332
Analog input and output modules, including RTD and thermocouple inputs
Interface modules IM 360 / IM 361
Interface modules for connecting expansion racks; codes 6ES7360-3AA01-0AA0 (IM 360) and 6ES7361-3CA01-0AA0 (IM 361)
Micro Memory Card (MMC)
Memory card required by the S7-300 CPUs, as stated in the data sheets
Other
Siemens automation systems migration page (S7-300, ET 200M)
Siemens automation systems migration page (S7-300, ET 200M)
Language: English
Manual
Guide for Migrating SIMATIC S7-300/S7-400 to S7-1500 and TIA Portal
Guide for Migrating SIMATIC S7-300/S7-400 to S7-1500 and TIA Portal
Language: English · Version 09/2015
Manual
CPU 31xC and CPU 31x: Technical specifications
CPU 31xC and CPU 31x: Technical specifications
Language: English
Manual
CPU 31xC and CPU 31x: Installation
CPU 31xC and CPU 31x: Installation
Language: English
Manual
S7-300 Module data
S7-300 Module data
Language: English · Version 05/2022
Data sheet
Data sheet 6ES7315-2EH14-0AB0 (CPU 315-2 PN/DP)
Data sheet 6ES7315-2EH14-0AB0 (CPU 315-2 PN/DP)
Language: English
Data sheet
Data sheet 6ES7318-3EL01-0AB0 (CPU 319-3 PN/DP)
Data sheet 6ES7318-3EL01-0AB0 (CPU 319-3 PN/DP)
Language: English
Other
Siemens blog: The Simatic S7 product family is getting upgrades
Siemens blog: The Simatic S7 product family is getting upgrades
Language: English
According to Siemens' migration page the S7-300 and ET 200M were discontinued on 1 October 2025. Since then only spare parts or repair are supplied, some parts are exchange-only, and no new quantities are delivered for expansion or new systems. End of production and sales (PM490) is 1 October 2033. The status of single codes can differ, so ask the Industry Mall.
Siemens recommends S7-1500 with ET 200MP or ET 200SP, and also names S7-400 and ET 200SP HA (for process automation). Note that the S7-400 itself was announced for phase-out on 1 October 2026, so it is not a sound choice for a new system. For ET 200M there are signal adapters that let you replace only the controller and keep the field wiring. The 2015 migration guide proposes an S7-1500 CPU for each S7-300 CPU, for example the CPU 315-2 PN/DP to the CPU 1515-2 PN.
According to the data sheets, STEP 7 V5.5 or higher (V5.5 + SP1 for the CPU 312, 313C and 314). Support in TIA Portal for each CPU and firmware version has to be checked in the release notes of the TIA Portal version.
The data sheets reviewed describe the CPUs as 'Micro Memory Card required': the program and data are stored on the Micro Memory Card (MMC), and the CPU does not run without it.
According to the data sheets the PN/DP CPUs (315-2, 317-2 and 319-3) support up to 4 racks and the CPU 315-2 PN/DP takes up to 8 modules per rack. The CPU 313C takes up to 8 modules per rack, with at most 7 in rack 3.
SIMATIC S7-1500
Modular Siemens advanced controller with standard, compact, fail-safe, technology and redundant CPUs, up to 162 MB of work memory and bit instruction times down to 0.3 ns
پی‌ال‌سی (PLC)
SIMATIC S7-400
Powerful modular Siemens controller for plant and process automation with standard, fail-safe (F) and fault-tolerant (H) CPUs; Siemens announced the phase-out of the standard, F and H CPUs on 1 October 2026 (type cancellation planned for 1 January 2027 for F and 1 October 2027 for standard and H), while the CPU 410-5H for PCS 7 stays active and the recommended replacements are the CPU 410 and S7-1500
پی‌ال‌سی (PLC)
Has a successor
SIMATIC S7-1200
Compact Siemens controller for small to mid-size machines, with integrated I/O and a PROFINET port; the new S7-1200 G2 generation succeeds the first generation (G1)
پی‌ال‌سی (PLC)
SIMATIC STEP 7
Software for configuring, programming, testing and diagnosing SIMATIC controllers: STEP 7 in TIA Portal in Basic and Professional editions, and classic STEP 7 V5.7 SP4
نرم‌افزار اتوماسیون
TIA Portal
Siemens' integrated engineering framework that brings PLC programming, HMI and SCADA design and drive commissioning together in one project; current version V21
نرم‌افزار اتوماسیون
Send your order code or requirement; after a technical review we give you the price and delivery time.