Siemens 6ES7288-1SR40-0AA0 CPU Module – Obsolete S7-200 SMART Spare Part

Technical Dossier

Product Details And Specifications

Siemens 6ES7288-1SR40-0AA0 CPU Module – Obsolete S7-200 SMART Spare Part

The 6ES7288-1SR40-0AA0 is a CPU SR40 unit from the Siemens S7-200 SMART series. This series has reached end-of-mainstream-support, and sourcing replacement units through standard distribution channels is increasingly unreliable. DriveKNMS maintains RFQ-reviewed sourcing status of this module for facilities that cannot afford a forced migration on a compressed timeline.

RFQ support for obsolete parts: Send the model number, required quantity and destination so DriveKNMS can confirm sourcing options before quotation.

Technical Specifications

Solving the Discontinued Hardware Crisis

The S7-200 SMART platform was widely deployed across food & beverage, water treatment, textile, and light manufacturing facilities throughout Asia, Eastern Europe, and Latin America between 2012 and 2020. Many of these installations are mid-life from a mechanical standpoint — conveyors, mixers, and packaging lines with 15–20 years of remaining useful life — but are now stranded on a control platform that Siemens no longer actively supports.

The CPU SR40 (6ES7288-1SR40-0AA0) is the processing core of these systems. It holds the ladder logic, manages I/O communication, and executes the timing sequences that the entire line depends on. There is no firmware-compatible drop-in replacement from the current Siemens portfolio without a full engineering redevelopment effort. For plant managers facing this reality, the only cost-rational path is to secure verified spare units and extend the operational life of the existing system.

Facilities that have implemented a structured spare parts strategy for legacy PLC platforms consistently report 5–10 additional years of productive asset life before a planned — rather than forced — migration becomes necessary. The cost difference between a planned migration and an emergency one is rarely less than 40%.

Condition & Reliability Assurance

Every 6ES7288-1SR40-0AA0 unit processed by DriveKNMS passes a five-stage inspection protocol before it is offered for sale:

• Visual & Mechanical Inspection: Housing integrity, connector pin condition, and label verification against the original Siemens part number.
• Electrolytic Capacitor Assessment: Capacitors are the primary failure point in aged PLC hardware. Each unit is inspected for bulging, leakage, and ESR deviation from specification.
• Firmware Version Verification: The installed firmware version is documented and disclosed. Compatibility with the customer's existing STEP 7 Micro/WIN SMART project is confirmed prior to shipment where possible.
• Pin & Connector Corrosion Check: All I/O terminals, communication ports, and power connectors are inspected under magnification for oxidation and contact resistance issues.
• Functional Power-On Test: Units are powered and tested for basic CPU operation, communication port response, and I/O channel integrity.

Condition grade (New / Refurbished-Grade-A / Tested-Used) is disclosed on each order confirmation. We do not mix grades within a single shipment without explicit customer agreement.

Key Features for System Maintenance

How do I confirm the unit is new or properly refurbished?
Each shipment includes a condition report documenting the inspection steps completed, the firmware version installed, and the test results recorded. New-in-box units include original Siemens packaging where available.

Can you source other S7-200 SMART modules?
Yes. DriveKNMS sources across the full S7-200 SMART range including expansion modules (EM), signal boards (SB), and HMI panels. Contact us with your full BOM for a consolidated quote.