• Siemens SIMATIC S7-300 Controllers

    Stock Model List – Siemens SIMATIC S7-300

    In stock

    The most prominent features of the Siemens SIMATIC S7-300 are:
    Supports multiple communication interfaces.
    Ability to run intelligent diagnostics.
    Reverse-polarity protection to prevent damage from wiring errors.
    Easy integration with operating systems.

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  • Siemens 6ES7393-4AA10-0AA0 SIMATIC S7-300

    Siemens 6ES7393-4AA10-0AA0 SIMATIC S7-300

    Siemens 6ES7393-4AA10-0AA0 SIMATIC S7-300, Cable guide LK 393 for F modules Connections L+ and M are safety-oriented the terminals fed in, 5 units per packing unit. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7393-4AA10-0AA0Categories: SIMATIC S7-300Brand: SiemensSiemens 6ES7393-4AA10-0AA0 SIMATIC S7-300Siemens 6ES73934AA100AA0…

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  • Siemens SIMATIC S7-300

    Siemens 6ES7392-2XY20-0AA0 SIMATIC S7-300

    Siemens 6ES7392-2XY20-0AA0 SIMATIC S7-300, Labeling Cover for F modules (spare part), 10 units per packing unit. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7392-2XY20-0AA0Categories: SIMATIC S7-300Brand: SiemensSiemens 6ES7392-2XY20-0AA0 SIMATIC S7-300Siemens 6ES73922XY200AA0 SIMATIC S7-300 100% New & Original. Quick Quote. Fast Delivery….

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  • Siemens SIMATIC S7-300

    Siemens 6ES7392-2XX20-0AA0 SIMATIC S7-300

    Siemens 6ES7392-2XX20-0AA0 SIMATIC S7-300, Labeling strips for F modules (spare part), 10 units per packing unit. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7392-2XX20-0AA0Categories: SIMATIC S7-300Brand: SiemensSiemens 6ES7392-2XX20-0AA0 SIMATIC S7-300Siemens 6ES73922XX200AA0 SIMATIC S7-300 100% New & Original. Quick Quote. Fast Delivery….

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  • Siemens SIMATIC S7-300

    Siemens 6ES7392-1AJ20-0AA0 SIMATIC S7-300

    Siemens 6ES7392-1AJ20-0AA0 SIMATIC S7-300, front connector for 6ES7331-7SF00-0AB0, for improving the precision at thermocouple measuring in the internal compensation measuring type. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7392-1AJ20-0AA0Categories: SIMATIC S7-300Brand: SiemensSiemens 6ES7392-1AJ20-0AA0 SIMATIC S7-300Siemens 6ES73921AJ200AA0 SIMATIC S7-300 100% New &…

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    Siemens 6ES7390-7BA00-0AA0 SIMATIC S7-300

    Siemens 6ES7390-7BA00-0AA0 SIMATIC S7-300, Connecting comb between PS307 and CPUS of 2nd generation (before 2003) spare part. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7390-7BA00-0AA0Categories: SIMATIC S7-300Brand: SiemensSiemens 6ES7390-7BA00-0AA0 SIMATIC S7-300Siemens 6ES73907BA000AA0 SIMATIC S7-300 100% New & Original. Quick Quote. Fast…

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  • Siemens SIMATIC S7-300

    Siemens 6ES7390-6BA00-0AA0 SIMATIC S7-300

    Siemens 6ES7390-6BA00-0AA0 SIMATIC S7-300, Mounting adapter for snapping on PS307 on 35 mm standard mounting rail. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7390-6BA00-0AA0Categories: SIMATIC S7-300Brand: SiemensSiemens 6ES7390-6BA00-0AA0 SIMATIC S7-300Siemens 6ES73906BA000AA0 SIMATIC S7-300 100% New & Original. Quick Quote. Fast Delivery….

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  • Siemens SIMATIC S7-300

    Siemens 6ES7390-1AJ85-0AA0 SIMATIC S7-300

    Siemens 6ES7390-1AJ85-0AA0 SIMATIC S7-300, mounting rail L=885 mm for mounting ET200iSP in 900 mm control cabinet. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7390-1AJ85-0AA0Categories: SIMATIC S7-300Brand: SiemensSiemens 6ES7390-1AJ85-0AA0 SIMATIC S7-300Siemens 6ES73901AJ850AA0 SIMATIC S7-300 100% New & Original. Quick Quote. Fast Delivery….

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  • Siemens 6ES7390-1AF85-0AA0 SIMATIC S7-300

    Siemens 6ES7390-1AF85-0AA0 SIMATIC S7-300

    Siemens 6ES7390-1AF85-0AA0 SIMATIC S7-300, mounting rail L=585 mm for mounting ET200iSP in 650 mm control cabinet. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7390-1AF85-0AA0Categories: SIMATIC S7-300Brand: SiemensSiemens 6ES7390-1AF85-0AA0 SIMATIC S7-300Siemens 6ES73901AF850AA0 SIMATIC S7-300 100% New & Original. Quick Quote. Fast Delivery….

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  • Siemens 6ES7335-7HG02-0AB0 SIMATIC S7-300

    Siemens 6ES7335-7HG02-0AB0 SIMATIC S7-300

    $1375.00

    Siemens 6ES7335-7HG02-0AB0 SIMATIC S7-300, ANALOG MODULE SM 335, OPTICALLY ISOLATED U/I; DIAGNOSTICS; INTERRUPT, 4 AI 14 BIT RESOL., 4 AO 11/12 BIT 1 X 20-PINS. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7335-7HG02-0AB0Categories: SIMATIC S7-300Brand: SiemensSiemens 6ES7335-7HG02-0AB0 SIMATIC S7-300Siemens 6ES73357HG020AB0 SIMATIC…

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  • Siemens SIMATIC S7-300

    Siemens 6ES7332-8TF01-0AB0 SIMATIC DP

    $1457.00

    Siemens 6ES7332-8TF01-0AB0 SIMATIC DP, HART analog output, SM 332, 8 AO, 0/4 – 20 mA HART, for ET200M with IM153-2, IM 153-2, 20-pole Functions: FW update, HART auxiliary variables, redundancy, local diagnostic buffer with time stamping. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact…

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  • Siemens 6ES7332-5TB10-0AB0 SIMATIC DP

    Siemens 6ES7332-5TB10-0AB0 SIMATIC DP

    Siemens 6ES7332-5TB10-0AB0 SIMATIC DP, HART analog output, SM 332, 2 AO, 0/4 – 20 mA HART, as of HART Rev. 5.0, for ET200M with IM 153-2, 1 x 20-pole. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7332-5TB10-0AB0Categories: SIMATIC S7-300Brand: SiemensSiemens 6ES7332-5TB10-0AB0…

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  • Siemens SIMATIC S7-300

    Siemens 6ES7332-5RD00-0AB0 SIMATIC S7-300

    Siemens 6ES7332-5RD00-0AB0 SIMATIC S7, analog output SM 332, isolated, 4 AA; 0/4 to 20 mA, 20-pole, for signals from the hazardous area, diagnostics-capable, PTB tested. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7332-5RD00-0AB0Categories: SIMATIC S7-300Brand: SiemensSiemens 6ES7332-5RD00-0AB0 SIMATIC S7-300Siemens 6ES73325RD000AB0 SIMATIC…

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  • Siemens SIMATIC S7-300

    Siemens 6ES7331-7TF01-0AB0 SIMATIC DP

    Siemens 6ES7331-7TF01-0AB0 SIMATIC DP, HART analog input SM 331, 8 AI, 0/4 – 20 mA HART, for ET200M with IM153-2, 1 x 20-pole, Functions: FW update, HART auxiliary variables, redundancy, local diagnostic buffer with time stamping. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact…

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  • Siemens SIMATIC S7-300

    Siemens 6ES7331-7TB10-0AB0 SIMATIC DP

    Siemens 6ES7331-7TB10-0AB0 SIMATIC DP, HART analog input SM 331, 2 AI, 0/4 – 20 mA HART, as of HART Rev. 5.0, for ET200M with IM 153-2, 1 x 20-pole. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7331-7TB10-0AB0Categories: SIMATIC S7-300Brand: SiemensSiemens 6ES7331-7TB10-0AB0…

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  • Siemens SIMATIC S7-300

    Siemens 6ES7331-7SF00-0AB0 SIMATIC S7-300

    Siemens 6ES7331-7SF00-0AB0 SIMATIC S7, analog input SM 331, isolated, 8 AI thermocouples/4 AI Pt100, for signals from the hazardous area, diagnostics-capable, PTB tested 1 x 20-pole. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7331-7SF00-0AB0Categories: SIMATIC S7-300Brand: SiemensSiemens 6ES7331-7SF00-0AB0 SIMATIC S7-300Siemens 6ES73317SF000AB0…

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  • Siemens 6ES7331-7RD00-0AB0 SIMATIC S7-300

    Siemens 6ES7331-7RD00-0AB0 SIMATIC S7-300

    Siemens 6ES7331-7RD00-0AB0 SIMATIC S7, analog input SM 331, isolated, 4 AE; 0/4 to 20 mA, 1 x 20-pole, for signals from the hazardous area, diagnostics-capable, PTB tested. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7331-7RD00-0AB0Categories: SIMATIC S7-300Brand: SiemensSiemens 6ES7331-7RD00-0AB0 SIMATIC S7-300Siemens…

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  • Siemens SIMATIC S7-300

    Siemens 6ES7328-7AA20-0AA0 SIMATIC S7-300

    Siemens 6ES7328-7AA20-0AA0 SIMATIC S7-300, raised front door for compact CPU, prepared for the connection of 1.3 mm2/16 AWG cables 5 units per packing unit incl. labeling strips and cabling diagram (petrol). Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7328-7AA20-0AA0Categories: SIMATIC S7-300Brand:…

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  • Siemens 6ES7326-1RF01-0AB0 SIMATIC S7-300

    Siemens 6ES7326-1RF01-0AB0 SIMATIC S7-300

    Siemens 6ES7326-1RF01-0AB0 SIMATIC S7, Digital input SM 326, 8 DI; 24 V DC, NAMUR, fail-safe NAMUR input for SIMATIC S7 F-systems, up to Category 4 (EN 954-1)/ SIL3 (IEC61508)/PLE (ISO13849), 1x 40-pole. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7326-1RF01-0AB0Categories: SIMATIC…

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  • Siemens 6ES7322-8BH10-0AB0 SIMATIC S7-300

    Siemens 6ES7322-8BH10-0AB0 SIMATIC S7-300

    Siemens 6ES7322-8BH10-0AB0 SIMATIC S7/PCS7, digital output SM 322, 16 DO; 24 V DC / 0.5 A, diagnostics-capable, wire break detection with 0 and 1 signal, 1 x 40-pole, interface IM 153-X HF required. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7322-8BH10-0AB0Categories:…

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  • Siemens 6ES7322-5SD00-0AB0 SIMATIC S7-300

    Siemens 6ES7322-5SD00-0AB0 SIMATIC S7-300

    Siemens 6ES7322-5SD00-0AB0 SIMATIC S7, digital output SM 322, isolated, 4 DO, 24 V DC, 10 mA, 1 x 20-pole, for signals from the hazardous area, diagnostics-capable, PTB tested. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7322-5SD00-0AB0Categories: SIMATIC S7-300Brand: SiemensSiemens 6ES7322-5SD00-0AB0 SIMATIC…

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  • Siemens 6ES7322-5RD00-0AB0 SIMATIC S7-300

    Siemens 6ES7322-5RD00-0AB0 SIMATIC S7-300

    Siemens 6ES7322-5RD00-0AB0 SIMATIC S7, digital output SM 322, isolated, 4 DO, 15 V / 20 mA 1 x 20-pole, for signals from the hazardous area, diagnostics-capable, PTB tested. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7322-5RD00-0AB0Categories: SIMATIC S7-300Brand: SiemensSiemens 6ES7322-5RD00-0AB0 SIMATIC…

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  • Siemens SIMATIC S7-300

    Siemens 6ES7338-7XF00-0AB0 SIMATIC S7-300

    Siemens 6ES7338-7XF00-0AB0 SIMATIC S7-300, IQ-Sense SM 338 for S7-300 and ET 200M for connection of up to 8 IQ sense sensors, connectable are optic sensors & ultrasonic sensors. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7338-7XF00-0AB0Categories: SIMATIC S7-300Brand: Siemens Siemens 6ES7338-7XF00-0AB0…

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  • Siemens SIMATIC S7-300

    Siemens 6ES7338-4BC01-0AB0 SIMATIC S7-300

    Siemens 6ES7338-4BC01-0AB0 SIMATIC S7-300, Signal module for 3 SSI encoders for reading in the position value with 2 FREEZE inputs, 1x 20-pole Supports isochronous mode. Our products are 100% New & Original, in stock, low price promotion. If you need more information, please contact us. Model: 6ES7338-4BC01-0AB0Categories: SIMATIC S7-300Brand: Siemens Siemens 6ES7338-4BC01-0AB0 SIMATIC S7-300Siemens 6ES73384BC010AB0…

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Siemens SIMATIC S7-300

Fully developed and proven controllers, the Siemens SIMATIC S7-300 is designed to be compatible with legacy systems and traditional industrial architecture. Being basic SIMATIC devices, these have a robust, compact, and modular design.

At PLCS-Automation, we offer the Siemens SIMATIC S7-300 range, compatible with legacy systems for robust automation.

Product Features and Capabilities

The key features offered by the Siemens SIMATIC S7-300 are as follows:

  • Modular Design: Allows easy customization and flexible expansion depending on the applications.
  • Compact Design: Easy installation and space savings in compact areas.
  • Diagnostic Capabilities: Equipped with in-built diagnostics like LED lights that show status.
  • Memory Functions: Compatible with the SIMATIC Micro Memory Cards for loading and storing user programs​.
  • Robust, Reliable Design: Ensures efficient operations under harsh industrial conditions.
  • Compatibility: Designed to be compatible with legal systems.

Siemens SIMATIC S7-300 and Associated Devices Available

By choosing the Siemens SIMATIC S7-300, you should get access to the following:

  • SIMATIC S7-300 CPU: Compatible with the Totally Integrated Automation (TIA) portal and variable capacities that support medium to large industrial operations.
  • SIMATIC S7-300 Memory Card: Designed for the S7-300 CPUs, these serve as configurable, removable storage devices.
  • SIMATIC S7-300 Power Supply: Available in 2A, 5A, and 10A, these offer safety isolation and serve as a load power supply.
  • SIMATIC DP: Serves as a communication system that connects devices for an integrated network.
  • SIMATIC S7-300 Modules: Includes interface modules, simulator modules, connectors, I/O modules, and other devices.

Applications and Industries

The Siemens SIMATIC S7-300 products can be used by the following industries:

  • Manufacturing and Assembly: Can manage complex production and assembly lines, including simple robotics integration for tasks like welding and painting.
  • Process Control: Used in industries like chemical and pharmaceutical to manage processes like mixing and dosing, for accuracy and compliance.
  • Energy and Utilities: Monitors energy consumption, controls turbines, and manages power distribution networks.
  • Aerospace and Defense: Can be integrated into avionics systems and used for testing and measurement.

Browse Our Collection of Siemens SIMATIC S7-300 and Other Products

Are you ready to avail automation for your legacy devices? Opt for the Siemens SIMATIC S7-300 products and associated devices to ensure compatibility.

Frequently Asked Questions


What Programming Languages Can Be Used With the S7-300?

The S7-300 supports several languages as defined by the IEC 61131-3 standard, including:

  • Ladder Diagram (LAD)
  • Function Block Diagram (FBD)
  • Statement List (STL)
  • Structured Control Language (SCL)

What Does the SF (System Fault) Led Being on Mean?

The SF LED indicates a system fault or an error within the CPU or the overall configuration. If this is “on”, connect your programming device and use the online diagnostics function in SIMATIC Manager or TIA Portal to view the CPU’s diagnostic buffer. From here, you can get the details about the specific error (e.g., I/O management issues, module failure, etc.).

Is the S7-300 Still Recommended for New Projects?

The S7-300 has shown success in traditional industrial architecture. However, for new projects, Siemens is strongly encouraging the use of the S7-1500 series, which offers better performance, enhanced diagnostics, and is fully integrated into the TIA Portal platform.

Can the Simatic S7-300 System Be Migrated to a Newer Platform?

Yes, Siemens provides guides and tools for migrating the SIMATIC S7-300 systems to the newer SIMATIC S7-1500 generation of controllers. This involves both hardware changes and software conversion to the TIA Portal environment.