Sales and repairs of SIEMENS SIMATIC S7-300 analog inputs / outputs

S7-300 analog inputs and outputs – new and refurbished parts and repairs

SIMATIC S7-300 analog I/O modules connect the PLC to sensors and actuators. We supply input and output modules for processing and transmitting analog signals.

FOXON ships parts worldwide and accepts faulty parts for repair
Enquire about purchase or repair

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 S7-300 analog inputs and outputs parts

S7-300 Analog Inputs and Outputs for SIEMENS SIMATIC S7-300

Combined AI/AQ modules integrate analog signal measurement and continuous actuator control into a single device.

Typical Uses and Proper Selection

Combined analog modules integrate measurement and output control into a single unit. When selecting a module, we compare the types of input and output signals, the number of channels, the measurement ranges, the resolution, and compatibility with the S7-300 configuration.

Please send us the full order number, a photo of the label, and, if possible, information about the wiring or project. Based on this information, we will verify compatibility, the availability of a new or refurbished part, the possibility of repair, and a suitable replacement.

How do you choose the right model?

The most reliable method is to select the part based on the complete SIEMENS part number. When replacing a part, we also recommend verifying the hardware and firmware versions, the part's function, the station configuration, and compatibility in TIA Portal.

  • the complete order number and the quantity requested,
  • the function and technical specifications of the original part,
  • compatibility with the CPU, expansion modules, and the project in question.

New and refurbished parts from our warehouses

For current S7-300 parts, we primarily 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 verify the availability of refurbished, discontinued, and hard-to-find variants.

Spare Parts Warehouse for Industrial Automation
Spare Parts Warehouse for Industrial Automation.
Warehouse for Industrial Parts and Automation Components
Warehouse for industrial parts and automation components.

Repairs of SIEMENS SIMATIC S7-300 Parts

You can send the defective part to FOXON for diagnosis and repair. We perform repairs at specialized repair centers in Europe, and after repair, the parts are functionally tested under load.

Specialized Repair Center for Industrial Electronics
A specialized repair center for industrial electronics.
Diagnosis and Repair of Industrial Electronics
Diagnosis and repair of industrial electronics.
Details of Electronics Repairs for Industrial Equipment
Details of an electronics repair on industrial equipment.

Frequently Asked Questions

What is the difference between AI, AQ, and AI/AQ?

AI is an analog input, AQ is an analog output, and AI/AQ combines both functions in a single module.

How quickly can you deliver the part?

Delivery times depend on the specific part and warehouse. Thanks to our access to numerous warehouses, we 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.

Is the order number enough for the inquiry?

Yes. Ideally, provide the full number from the label and the requested quantity; a photo of the label will also be helpful for replacements or repairs.

Sales, Repair, Purchase
6ES7335-7HG02-0AB0

6ES7335-7HG02-0AB0

In external stock
Code: 6ES7335-7HG02-0AB0
SIMATIC S7-300, ANALOG MODULE SM 335, OPTICALLY ISOLATED U/I; DIAGNOSTICS; INTERRUPT, 4 AI 14 BIT RESOL., 4 AO 11/12 BIT 1 X 20-PINS
Sales, Repair, Purchase
6ES7334-0KE00-0AB0

6ES7334-0KE00-0AB0

In stock
Code: 6ES7334-0KE00-0AB0
SIMATIC S7-300, Analog module SM 334, isolated, 4 AI/2 AO, 12 bit, 0-10 V f. Pt100 (climatic range -120-155 degrees) and 10 kOhm measuring…
Sales, Repair, Purchase
6ES7334-0CE01-0AA0

6ES7334-0CE01-0AA0

In external stock
Code: 6ES7334-0CE01-0AA0
SIMATIC S7-300, Analog module SM 334, Non-isolated 4 AI/2 AO, 1x 20-pole, Removing and inserting possible with active backplane bus
How to capture sporadic faults on Siemens S7 PLCs

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.