Sales and repairs of SIEMENS SIMATIC S7-400 FM modules
S7-400 function modules – new and refurbished parts and repairs
SIMATIC S7-400 function modules add specialised tasks to the PLC, such as counting, positioning and closed-loop control. We supply FM modules to suit the required function and system configuration.
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 S7-400 function modules parts
Function Modules FM 450 through FM 455
S7-400 function modules handle specialized tasks beyond standard I/O: high-speed counting, positioning, cam control, and regulation. Siemens offers, for example, the FM 450-1, FM 451, FM 452, FM 453, and FM 455.
For functional modules, the part number alone is not enough. We need to know the specific task—such as counting, positioning, or control—and the type of encoders, sensors, or actuators connected. We then verify the parameter settings, functional blocks, and integration with the PLC program.
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 Parts
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
Yes. Please send us the order number for the CPU and the modules in the workstation; we will verify compatibility and find a suitable replacement.
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 hours. For urgent requests, call us immediately—we can arrange express delivery of selected parts day or night.
Yes. Ideally, you should provide the entire 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.
Question or Inquiry
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