Siemens SIMATIC S7-400 Full Series Enters Phase-Out — PCS 7 Moves to CPU 410, S7-1500 Takes Over General Applications Published: 2026-09-17 | Category: Product & Technology | Keywords: S7-400 Full Series · Industry News · Phase-Out & Replacement Contact: [email protected] | WhatsApp: +8615272221149

The classic large rack PLC SIMATIC S7-400 enters full series phase-out. Siemens clarifies the scope. CPU 410 for PCS 7 process control will stay on market. General automation projects will shift to S7-1500. Siemens offers up to 10 years of spare parts support.

01 Phase-Out Range: S7-400 Retired, CPU410 Remains

S7-400 series starts phase-out together with S7-300.

• Phase-out list: CPU 412/414/416/417, 400H redundant, 400F/FH failsafe and related modules
• Not discontinued: CPU 410 / 410-5H, the core controller for PCS 7
• Spare parts supply for S7-400 will last past 2035

The old rack structure cannot support TSN, OPC UA and modern industrial security requirements. This drives the product upgrade.

02 PCS7 Upgrade Route: Switch to CPU 410-5H

For PCS7 users with S7-400H redundant systems, CPU 410-5H is the official replacement. It keeps the high availability redundancy design of S7-400H. Synchronization modules and fiber setups can be reused. It supports existing PCS7 software and libraries to protect your software investment. Check official compatibility documents before replacement.

03 General Automation: Migrate to S7-1500

For non-PCS7 large automation projects, S7-1500 is the successor platform on TIA Portal.

• CPU 1518-4 PN/DP: High-performance replacement for top S7-400 models
• CPU 1518HF /1518F: For safety-related failsafe applications
• S7-1500R/H: Redundant solution equal to S7-400H for critical production lines S7-1500 has built-in PROFINET, web server and OPC UA for digitalization.

04 Distributed I/O Migration for ET 200M

ET200M I/O modules also follow the platform transition plan.

• PCS7 process control: ET200M upgrades to ET200SP HA, with hot swap and redundant power
• Factory automation: ET200M migrates to ET200MP or ET200SP ET200M spare parts are guaranteed until October 2033.

05 Lifecycle & Spare Parts Rules

Siemens defines clear lifecycle milestones.

• PM400: Phase-out announcement, items still available for new orders
• PM410: Formal discontinuation, only spare parts sales
• PM490: End of spare parts supply and technical support S7-400 spare support extends beyond 2035 for smooth equipment transition.

06 Migration Tools & Methods

PCS7 users adopt CPU410-5H with matching sync modules and fiber cables. For general automation, TIA Portal has built-in PLC migration tools. It converts most S7-300/400 programs for S7-1500. Manual checks on partial instructions are needed. Two recommended plans: replace I/O first then CPU, or full swap during plant shutdown.

07 Project Timeline

• 2023-10: PM400 release for S7-300/ET200M, S7-400 phase-out starts
• 2025-10: PM410 formal discontinuation for S7-300/ET200M
• 2026 onward: S7-400 modules enter spare-parts phase batch by batch
• 2033-10: ET200M spare parts cutoff date
• 2035+: End boundary of S7-400 official availability

08 Impacts for Different Users

Process industry PCS7 users: Plan upgrade to CPU410-5H, reuse software assets. Large production line owners: Prepare S7-1500 migration and build TIA Portal environment early. Procurement teams: Reserve critical S7-400 spare parts in advance to prevent downtime. System integrators: S7-400 migration service brings new business opportunities.

09 About the Company

Wuhan Hantuo Automation We supply genuine Siemens PLC, drive, servo, HMI and sensor products. We serve global OEMs, system integrators and end users. We provide fast quotation, global logistics and professional technical support. We help customers complete equipment upgrade, maintenance and spare part management at lower cost.

Contact: [email protected] | WhatsApp: +8615272221149