Sales and repair of SIMATIC S7-1200 communication modules

S7-1200 communication modules – new and refurbished parts and repairs

SIMATIC S7-1200 communication modules connect the PLC to other devices and industrial networks. We supply communication processors and modules for Ethernet, PROFIBUS and serial communication, depending on the type.

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 S7-1200 communication modules parts

S7-1200 Communication Modules for SIEMENS SIMATIC S7-1200

Communication modules expand the CPU's capabilities by adding the necessary interfaces and protocols. When selecting a module, it is important to determine the type of network and the support available in the CPU being used.

Typical Applications and Selection

Communication modules expand the S7-1200 with serial interfaces and other communication options for connecting peripherals, measuring devices, readers, and higher-level systems.

  • Required protocol and physical interface
  • Support for specific CPUs and firmware
  • number of communication ports
  • Configuring Communication and Diagnostics in TIA Portal

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 recommend also 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 inventory

For current S7-1200 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, which is why we can also verify the availability of remanufactured, 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 S7-1200 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
Diagnostics and repair of industrial electronics.
Details on the Repair of Industrial Equipment Electronics
Details of an electronics repair on industrial equipment.

Frequently Asked Questions

Can you help verify the module's compatibility with the CPU?

Yes. Please send us the order number for the CPU and the modules in the workstation; we will verify their compatibility and find a suitable replacement.

How quickly can you deliver the part?

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.

Is the order number enough for the inquiry?

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.

Sales, Repair, Purchase
6ES7241-1CH30-0XB0

6ES7241-1CH30-0XB0

In external stock
Code: 6ES7241-1CH30-0XB0
SIMATIC S7-1200, Communication module CM 1241, RS485, 9-pole D-sub (socket).
Sales, Repair, Purchase
6GK7277-1AA10-0AA0

6GK7277-1AA10-0AA0

In stock
Code: 6GK7277-1AA10-0AA0
Compact Switch Module CSM 1277 for connecting SIMATIC S7-1200 and additional nodes to Industrial Ethernet.
Sales, Repair, Purchase
6ES7241-1CA50-0XB0

6ES7241-1CA50-0XB0

In external stock
Code: 6ES7241-1CA50-0XB0
SIMATIC S7-1200 G2: CB 1241 Communication Board, interface: RS485, with push-in terminal block
Sales, Repair, Purchase
6ES7241-1EA50-0XB0

6ES7241-1EA50-0XB0

In external stock
Code: 6ES7241-1EA50-0XB0
SIMATIC S7-1200 G2: CM 1241 communication module; interfaces: RS232/422/485, with push-in terminal block
Sales, Repair, Purchase
6ES7241-1CH31-0XB0

6ES7241-1CH31-0XB0

In external stock
Code: 6ES7241-1CH31-0XB0
SIMATIC S7-1200, Communication module CM 1241, RS-422/485,9 POL Sub-D (socket) supports Freeport
Sales, Repair, Purchase
3RK7271-1AA30-0AA0

3RK7271-1AA30-0AA0

In external stock
Code: 3RK7271-1AA30-0AA0
SIMATIC S7-1200, DCM 1271 Data decoupling module for AS-i Master CM 1243-2 IN: 24 V / 30 V DC OUT: 1x AS-Interface, 4 A Integrated overload…
Sales, Repair, Purchase
6GT2002-0LA00

6GT2002-0LA00

In external stock
Code: 6GT2002-0LA00
RFID communication module RF120C for SIMATIC S7-1200; 1 reader connectable; RS-422
Sales, Repair, Purchase
6GK7243-8RX30-0XE0

6GK7243-8RX30-0XE0

In external stock
Code: 6GK7243-8RX30-0XE0
Communications processor CP 1243-8 IRC for operating a SIMATIC S7-1200 in the TeleControl system Professional; for SINAUT ST7; DNP3; IEC608…
Sales, Repair, Purchase
6GK7243-7KX30-0XE0

6GK7243-7KX30-0XE0

In external stock
Code: 6GK7243-7KX30-0XE0
Communications processor CP 1243-7 LTE EU for Connection of SIMATIC S7-1200 to LTE network in European Frequency range
Sales, Repair, Purchase
6GK7243-1BX30-0XE0

6GK7243-1BX30-0XE0

In stock
Code: 6GK7243-1BX30-0XE0
Communications processor CP 1243-1 for connection of SIMATIC S7-1200 as additional Ethernet interface and for Connection to control centers…
Sales, Repair, Purchase
6GK7242-7KX31-0XE0

6GK7242-7KX31-0XE0

In external stock
Code: 6GK7242-7KX31-0XE0
Communications processor CP 1242-7 V2 for connection of SIMATIC S7-1200 to GSM/GPRS network; Web server access to CPU, data point…
Sales, Repair, Purchase
6ES7241-1CH32-0XB0

6ES7241-1CH32-0XB0

In external stock
Code: 6ES7241-1CH32-0XB0
SIMATIC S7-1200, Communication module CM 1241, RS422/485, 9-pole D-sub (socket) supports Freeport
Sales, Repair, Purchase
6ES7241-1CH30-1XB0

6ES7241-1CH30-1XB0

In external stock
Code: 6ES7241-1CH30-1XB0
SIMATIC S7-1200, Communication Board CB 1241, RS485, terminal block, supports Freeport
Sales, Repair, Purchase
6ES7241-1AH32-0XB0

6ES7241-1AH32-0XB0

In stock
Code: 6ES7241-1AH32-0XB0
SIMATIC S7-1200, Communication module CM 1241, RS232, 9-pole D-sub (pin), supports Freeport
Sales, Repair, Purchase
6GK7243-5DX30-0XE0

6GK7243-5DX30-0XE0

In external stock
Code: 6GK7243-5DX30-0XE0
SIEMENS communication module CM 1243-5 for SIMATIC S7-1200 to PROFIBUS connection.
Sales, Repair, Purchase
6GK7242-5DX30-0XE0

6GK7242-5DX30-0XE0

In stock
Code: 6GK7242-5DX30-0XE0
SIEMENS communication module CM 1242-5 for connecting SIMATIC S7-1200 to PROFIBUS as DP Slave.
Sales, Repair, Purchase
6GK7243-7SX30-0XE0

6GK7243-7SX30-0XE0

Inquire product
Code: 6GK7243-7SX30-0XE0
Communications processor CP 1243-7 LTE US for Connection of SIMATIC S7-1200 to LTE network in American frequency band
Sales, Repair, Purchase
3RK7243-2AA30-0XB0

3RK7243-2AA30-0XB0

Inquire product
Code: 3RK7243-2AA30-0XB0
SIMATIC S7-1200, CM 1243-2 communication module AS-Interface master according to AS-i specification V3.0
Sales, Repair, Purchase
6GK7243-1JX30-0XE0

6GK7243-1JX30-0XE0

Inquire product
Code: 6GK7243-1JX30-0XE0
Communications processor CP 1243-1 DNP3 for connection of SIMATIC S7-1200 to control center with DNP3 protocol
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.