S7-1200 G2 Now Shipping: G1 Phase-Out Timeline and Spare Parts Strategy
August 10, 2026Siemens has published a firm end date for the first-generation SIMATIC S7-1200. In an advance notice dated June 30, 2026 (Siemens Industry Online Support entry ID 109996314), the company confirmed that the S7-1200 G1 will be officially declared phased out on November 1, 2026, and that G1 units will remain orderable as new parts only through September 30, 2027. At the same time, the successor platform, the SIMATIC S7-1200 G2, has reached delivery release (entry ID 109973175). For the maintenance engineers and procurement teams who keep G1-based machines running across packaging plants, water and wastewater facilities, and HVAC systems, those two dates are the most consequential product lifecycle information Siemens has published in years. The full timeline, the G2's pricing and capabilities, and a practical spare parts plan for the transition follow.
Advance notice 109996314 is short, but three figures in it define the remaining commercial life of every G1 CPU, I/O module, signal board, and power supply in your plant:
· November 1, 2026. The G1 is officially declared phased out. This is the formal end-of-life declaration, the date from which Siemens treats the platform as a legacy product in its systems.
· September 30, 2027. The last date on which a G1 can be ordered as a new part. Between November 2026 and this date, the G1 remains fully orderable through normal channels.
· Approximately nine years of spare parts supply after the order cutoff. Siemens' planning horizon for G1 spare parts runs to roughly 2036.
Two details in that notice deserve close attention. First, the phase-out declaration is not the last order date. Siemens has structured the transition with a window of nearly one year after the declaration during which brand-new G1 hardware can still be purchased. Second, the spare parts commitment is long. Nine years of planned spares supply takes the platform well past the point where most of today's G1 machines will have been retired or migrated on their own schedules.
The S7-1200, launched in 2009, has been one of the most widely deployed compact PLCs of the last 15 years. It became the default controller for small and mid-sized machines across three of the most common plant environments in industrial maintenance: packaging lines, where it runs labelers, cartoners, and wrappers; water and wastewater treatment, where it sequences pumps, valves, and chemical dosing; and HVAC, where it coordinates air handling units, chillers, and building utilities. OEMs built it into equipment shipped to every region, and its combination of integrated Ethernet, a compact footprint, and TIA Portal engineering made it the entry point to Siemens automation for an entire generation of engineers.
The geography of that installed base matters for the spare parts market. In the Middle East, the S7-1200 shows up in desalination plants, pumping stations, and oil and gas auxiliary systems, where equipment is specified for decades of service in harsh conditions. In the Americas, it is embedded in food and beverage packaging lines and in HVAC plant equipment that runs continuously. In Europe, it drives wastewater treatment trains and machine tools that must meet strict documentation and safety requirements. In every one of those regions, the maintenance organization inherits the phase-out decision whether or not it participated in the original purchase. The engineers who commissioned these machines in 2012, 2015, or 2019 are often the same people who will be asked to keep them running in 2030.
That installed base is the reason a phase-out notice for a compact PLC is a real event rather than a paperwork formality. Industrial machines have service lives measured in decades, and most G1-controlled equipment will keep running on G1 hardware long after the last new CPU leaves a Siemens warehouse. A calendar date passing does not re-engineer a packaging line. Re-engineering happens when the line is rebuilt, the process changes, or a failed component can no longer be sourced at a reasonable price.
That last scenario is the one to plan around. A single failed CPU in 2028 is an ordinary maintenance event. A single failed CPU in 2028 with no spare on the shelf, no new stock available from distributors, and a machine that cannot run without it is an unplanned rebuild with production downtime measured in weeks. What you buy and store before September 30, 2027 closes the gap between those two outcomes.
Date | Milestone | What it means in practice
June 30, 2026 | Advance notice published (entry 109996314) | Siemens formally opens the G1 phase-out procedure; the planning window starts
Now | S7-1200 G2 in delivery release (entry 109973175) | The successor platform is available to order; new designs should target G2
November 1, 2026 | G1 declared phased out | End-of-life status takes effect; G1 remains orderable as a new part
September 30, 2027 | Last order date for new G1 | Final day to buy brand-new G1 CPUs and modules through normal channels
October 1, 2027 | Spare-parts-only phase begins | No new G1 sales; supply is limited to spare parts and repair support
Through ~2036 | Planned G1 spare parts supply | Siemens' published planning horizon: about nine years of spares after the 2027 cutoff
Maintenance managers should put this table in front of anyone who budgets capital or spare parts spend. The date that matters for buying decisions is not November 2026, which only changes the product's official status. It is September 2027, which closes the door on new G1 hardware entirely.
Reading the table correctly matters, because Siemens' phase-out nomenclature is easy to misread. The November 2026 declaration is a status change in Siemens' product lifecycle systems; it triggers catalog updates, pricing adjustments, and the formal transition to end-of-life handling. The September 2027 cutoff is the commercial event with real consequences for buyers. Between those dates, G1 orders are processed normally. After the cutoff, new-manufacture G1 units disappear from the supply chain, and the market shifts to the stock that distributors and specialist traders accumulated beforehand. That is the mechanism by which a well-documented phase-out still produces a tightening spare parts market: the official supply does not vanish overnight, but the pool of new units available to late buyers shrinks every month.
The G2 is not a cosmetic refresh of the G1. Siemens is positioning it as the successor across the compact controller range, and the delivery release note (entry 109973175) confirms it is shipping now through normal distribution. The engineering environment stays consistent: the G2 integrates in TIA Portal, so teams that already work in Siemens' toolchain do not need to learn a new one.
Siemens cites improved performance and scalability, flexible machine safety, efficient motion control, and increased data transparency as the G2's headline advantages. For a plant engineer, that means a controller family with a wider performance span, more flexible safety functions, lighter motion-control engineering, and machine data that higher-level systems can read more readily.
Distributor listings in the United States put the SIMATIC S7-1200 G2 CPU 1214C DC/DC/DC, order number 6ES7214-1AH50-0XB0, at a list price of $395. That figure is a useful benchmark for budgeting a migration: the mid-range CPU of the new family is priced competitively for the compact PLC segment. Procurement teams should treat list price as a starting point, since actual quotes vary by region, volume, and distributor terms. The CPU price is a planning anchor, but a complete migration budget also includes the I/O and power supply hardware for the new cabinet and the engineering time for the project conversion. The free migration tool removes the software license cost from that equation, which for a multi-machine fleet is a meaningful line item that simply disappears.
G2 CPUs include failsafe variants. The CPU 1214FC DC/DC/DC, order number 6ES7214-1AF50-0XB0, is the fail-safe counterpart to the standard 1214C, which means machine safety functions can be implemented on the controller itself rather than through a separate safety arrangement.
Siemens has also introduced the SM 1226 F-DI 4/F-DQ 2 (order number 6ES7226-6ME50-0XB0), a fail-safe module that combines fail-safe digital inputs and fail-safe digital outputs in a single unit. At 30 mm wide, the module is compact, and Siemens states that it reduces DIN rail space by roughly 60 percent compared with a comparable G1 fail-safe configuration. For panel builders and maintenance teams working in crowded cabinets, that reduction is a concrete, measurable benefit of moving safety I/O to the G2 platform.
The G2 adheres to IEC 62443-4-2, the international standard for security capabilities of industrial automation components. For plants operating under OT security programs or facing vendor security questionnaires, that adherence matters: a controller family that addresses component-level security requirements is easier to justify to corporate IT and security stakeholders than one that predates the standard.
Siemens provides a free S7-1200 G2 migration tool (support entry ID 109986503) to help move existing projects to the new platform. The existence of an official, free migration path matters for planning: it removes a common barrier to upgrading, which is the cost and risk of re-engineering the application from scratch. Migration is still a project with its own testing and validation, but the tooling cost is zero.
The practical workflow is to run the tool per project, review the report it generates for items that need manual attention, and validate the migrated program on the target G2 hardware before touching production. Siemens documents the tool's scope and known limitations in the support entry, and the migration report doubles as an engineering worklist. For plants that run standardized machine programs across multiple lines, one validated migration can be reused as the template for the rest of the fleet, which is where the real time savings appear.
No plant needs to panic-migrate a healthy fleet. The announcement calls for deliberate buying and planning decisions in the next 13 months, while new G1 hardware is still available. Five actions cover the essentials.
Every G1 installation should have a defined set of critical spares on the shelf before the order cutoff. The minimum list is the components whose failure stops a machine: the CPU itself, the power supply, and every I/O module type in the machine's configuration. For plants with multiple identical machines, spare modules can be shared across the fleet, but the spares need to exist before October 2027, because after that date the only supply is whatever remains in distributor and specialist stock.
Common modules will remain available in specialist channels for years, because the spare parts commitment runs to roughly 2036 and the aftermarket will carry the platform. Less common items are the real risk: signal boards, communication modules, and older I/O variants that were configured on machines a decade ago. These are the modules that disappear from stock first when a platform enters its spare-parts-only phase. If a machine uses a module that is not a current catalog item, that module should sit near the top of the stocking list.
Nothing in the Siemens announcement forces a plant to migrate in 2026 or 2027. The G1 will remain supportable through roughly 2036, and many plants will legitimately run G1 for years. But the September 2027 cutoff is the natural deadline for a different decision: which lines migrate to G2, and which lines stay on G1 with stocked spares. Lines that migrate should be scheduled while G1 spares are still cheap and plentiful, so that the same budget cycle can cover both the migration and the remaining G1 spares. Lines that stay on G1 need their spares purchased before the cutoff, full stop.
The free G2 migration tool (entry 109986503) changes the economics of evaluating a migration. A plant can take one representative machine, migrate its project, and run it through validation at zero tooling cost. That pilot produces the two things every migration decision needs: a real estimate of engineering effort and a documented list of differences between the G1 and G2 environments. With those in hand, the rest of the fleet can be scheduled deliberately rather than in response to failures.
None of this works without an accurate inventory. Before any purchase order is placed, walk the plant and record what is actually in each cabinet: CPU order numbers, firmware versions, I/O module types, signal boards, and communication modules. Plants are routinely surprised by what a decade of small modifications leaves behind, including module variants that were never documented and spare parts that were already consumed and never replaced. The audit output is a stocking list ranked by failure criticality, and it is also the input the migration tool needs when a line is scheduled for conversion. The audit is unglamorous work, but it is the difference between buying the right spares in 2027 and discovering in 2028 that the one module nobody stocked is the one module that failed.
The spare parts angle of this announcement is straightforward: demand for G1 modules does not end when Siemens stops selling them as new. It rises. Plants that did not stock before the cutoff will be looking for G1 CPUs, power supplies, and I/O modules for years afterward, because their machines still run on G1, and the planned spare parts supply, however generous, does not put a spare in every cabinet.
That is why tztechio.com continues to carry first-generation S7-1200 modules alongside the newer platform. The Siemens section of the store lists G1 CPUs, I/O modules, signal boards, and power supplies, and the broader PLC category covers the rest of the automation spares market. The practical guidance for procurement is to compare what a plant holds in stock against its critical module list, and to place orders for the gaps before the September 2027 cutoff, while new G1 stock can still be bought at normal prices. After the cutoff, the same modules will trade in a thinner market where availability, not list price, is the deciding factor.
For plants that are migrating, the same storefront covers the transition: it adds G2 CPUs and modules to the Siemens inventory as they reach distribution, alongside the G1 spares that will keep legacy lines running. Running both generations through one procurement channel simplifies the transition period, which is exactly the period most plants are entering now.
Q: When is the S7-1200 G1 officially phased out?
A: Siemens declared in advance notice 109996314 that the G1 will be officially declared phased out on November 1, 2026. The phase-out declaration is the formal end-of-life status; it does not stop sales by itself.
Q: Can I still buy a new G1 CPU after November 1, 2026?
A: Yes. The G1 remains orderable as a new part until September 30, 2027. The November 2026 date changes the product's official status, and the September 2027 date is the last order date for new G1 hardware.
Q: How long will spare parts for the G1 be available?
A: Siemens plans spare parts supply for approximately nine additional years after the September 30, 2027 order cutoff, which puts the planning horizon at roughly 2036.
Q: What does the S7-1200 G2 cost?
A: As a benchmark, US distributor listings show the G2 CPU 1214C DC/DC/DC (order no. 6ES7214-1AH50-0XB0) at a list price of $395. Failsafe variants such as the CPU 1214FC DC/DC/DC (order no. 6ES7214-1AF50-0XB0) are available as well. Actual quotes vary by region and distributor terms.
Q: Is there a tool to migrate S7-1200 G1 projects to G2?
A: Yes. Siemens provides a free S7-1200 G2 migration tool, documented in support entry ID 109986503. It works within the TIA Portal environment.
Q: What is the SM 1226 F-DI 4/F-DQ 2?
A: It is a new G2 fail-safe I/O module (order no. 6ES7226-6ME50-0XB0) that combines fail-safe digital inputs and fail-safe digital outputs in one 30 mm-wide module. Siemens states it reduces DIN rail space by roughly 60 percent compared with a comparable G1 fail-safe configuration.
Q: Does the G2 meet modern cybersecurity requirements?
A: The G2 adheres to IEC 62443-4-2, the international standard for security capabilities of industrial automation components, and integrates in TIA Portal.
Q: Where can I buy G1 spare parts after the phase-out?
A: Specialist automation parts suppliers such as tztechio.com continue to stock first-generation S7-1200 modules. The Siemens spare parts section and the PLC category cover G1 CPUs, I/O, and power supplies.
Q: Should we migrate our G1 machines now, or keep them running?
A: That is a per-plant decision, and the Siemens timeline leaves room for both answers. A machine that is running reliably, has stocked spares, and is not under pressure for new connectivity or security features can legitimately stay on G1 for years, supported by the spare parts supply that runs to roughly 2036. A machine that is being rebuilt, that needs cybersecurity features the G1 platform cannot provide, or that must exchange more data with higher-level systems is a candidate for G2 migration. The discipline is to decide deliberately, machine by machine, before September 30, 2027, rather than to let the cutoff force the decision later.
· Siemens Industry Online Support, advance notice 109996314 (June 30, 2026): S7-1200 G1 phase-out declaration, last order date September 30, 2027, and approximately nine years of planned spare parts supply.
· Siemens Industry Online Support, delivery release note 109973175: S7-1200 G2 in delivery release.
· Siemens Industry Online Support, support entry 109986503: free S7-1200 G2 migration tool.
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