SIMATIC S7-400 PLC CPUs, I/O and Function Modules
Rack mounted PLC CPUs, I/O and function modules. Explore Siemens S7-400, including standard, fail safe and redundant CPUs and phase out announced models.
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The SIMATIC S7-400 Series
What is the product family?
The Siemens SIMATIC S7-400 series includes rack mounted PLC components designed for production lines and process plants. The range features standard CPUs, fail safe F-CPUs, H-CPUs for redundant systems and signal and function modules.
Where is it used?
The SIMATIC S7-400 is commonly used in production lines and process plants, where H-CPUs run in linked pairs and the plant cannot stop.
Models, compatibility and lifecycle
Models within the range differ in CPU type, performance and redundancy. Siemens announced the phase out of the 414-3, 416-2, 416-3 and 416F-3 PN/DP CPUs. Match the full order number and firmware when replacing a module.
Browse S7-400 Models
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Products 1-24 of 35
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Siemens
CPU 414-4H for S7-400H/F/FH, 2.8 MB, MPI/DP, DP and 2 sync interfaces
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Siemens
SM 421 digital input, 16 DI, 24 to 60 V AC/DC, interrupt and diagnostics
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Frequently asked questions
Questions buyers often ask about Siemens S7-400 products. Not answered here? Contact us.
Which order number should I send for Siemens SIMATIC S7-400 PLC CPUs, I/O and Function Modules parts?
The complete order number from the label of the existing unit, including every suffix, with the hardware revision and firmware version where shown. Parts in the same family can look alike and still differ.
How quickly do Siemens SIMATIC S7-400 PLC CPUs, I/O and Function Modules parts ship?
Usually ships within 3 to 7 working days of order confirmation. The exact lead time depends on the part and is stated on your quote.
What condition are Siemens SIMATIC S7-400 PLC CPUs, I/O and Function Modules parts supplied in?
New, factory sealed. The condition is also stated on your quote.
Do Siemens SIMATIC S7-400 PLC CPUs, I/O and Function Modules parts come with a warranty and testing?
Every product comes with a written warranty. The period depends on the model and its condition, and is stated on your quote before you order. Testing depends on the product, ranging from visual inspection to full functional testing, and is confirmed on your quote.
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