Sales and repairs of SIEMENS SIMATIC S7-400 CPU
SIMATIC S7-400 CPUs – new and refurbished parts and repairs
SIMATIC S7-400 CPUs execute the PLC program and control machines and industrial processes. We supply standard CPUs and processors for redundant S7-400H systems, depending on the version.
We will send a non-binding quote within 1 hour.
- Worldwide delivery
- Our own and partner parts stock
- Professional repairs
- Parts with warranty
More about selecting SIMATIC S7-400 CPUs parts
CPUs 412, 414, 416, and 417
The SIMATIC S7-400 CPU forms the control core of large-scale automation and process applications. Siemens distinguishes between the standard CPUs 412, 414, 416, and 417; the individual models differ in performance, memory, interfaces, and expansion options.
When replacing a CPU, please send us the complete order number and a photo of the label. For standard CPUs, we will verify the memory card, communication interface, frame configuration, and project version in STEP 7 or SIMATIC Manager. For S7-400H/FH redundant systems, it is necessary to evaluate both CPUs, their firmware, synchronization modules, and cables together.
New, refurbished, and discontinued parts from our warehouses
For current SIMATIC S7-400 parts, we first check the availability of new, genuine SIEMENS parts. We have access to an extensive network of industrial parts warehouses in Europe and around the world, so we can also check for refurbished, discontinued, and hard-to-find variants.
Diagnostics, Repairs, and Testing of S7-400 Components
You can send the defective part to FOXON for diagnosis. We perform repairs on CPUs, I/O modules, communication modules, functional modules, and power supplies at specialized repair centers; after repair, the parts are functionally tested under load. If repair is not feasible, we will check for an identical new or refurbished part or a compatible replacement.
Frequently Asked Questions
Often, yes, but you always need to verify the hardware/firmware version, configuration, license, and project compatibility in TIA Portal.
Delivery times depend on the specific part and warehouse. Thanks to our access to numerous warehouses, we can typically arrange delivery within a few days; for urgent needs, we can offer express delivery within a matter of hours. For urgent requests, call us immediately—we can arrange express delivery of selected parts day or night.
Yes. Ideally, please provide the full number from the label and the quantity you need; a photo of the label will also be helpful for replacements or repairs.
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How to capture sporadic faults on Siemens S7 PLCs
Sporadic faults on Siemens SIMATIC S7 PLCs are difficult to find using standard online diagnostics. In this article, we show how auto.spy analyzer helps capture signals, events and video on a single timeline and trace the root cause of the problem afterwards.
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