Sales and repairs of SIEMENS SIMATIC S7-400 digital outputs
S7-400 digital outputs – new and refurbished parts and repairs
SIMATIC S7-400 digital outputs switch actuators, indicators and other devices according to the PLC program. We supply transistor and relay modules to suit the wiring and load.
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 digital outputs parts
SM 422 Digital Outputs
SM 422 digital output modules control valves, contactors, signaling devices, and other actuators. When selecting a replacement, the decision depends not only on the number of channels, but primarily on the voltage, current load, and specific output configuration.
To properly replace the digital output, we need to know what the module is controlling—for example, a valve, a contactor, or a signal. We’ll verify the voltage, current load, number of channels, and whether it’s a transistor-based or relay-based design. This will prevent damage to the connected device.
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, which allows us to 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
Verify the output type, voltage, current per channel, number of channels, and the requirements of the connected devices.
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, provide the full number from the label and the desired quantity; a photo of the label will also be helpful for replacements or repairs.
6ES7 422-1BL00-0AA0
6ES7422-1BL00-0AA0
6ES7422-1BH11-0AA0
6ES7422-1BH10-0AA0
6ES7422-7BL00-0AB0
6ES7422-1HH00-0AA0
6ES7422-1FH00-0AA0
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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