# Siemens CM 1243-5 PROFIBUS Master Communication Module for SIMATIC S7-1200

**URL:** https://aio.lv/en/product--siemens-6gk7243-5dx30-0xe0--1778322
**Data updated:** 2026-05-18 02:52 (EEST)
**Category:** Server Parts & Components
**Manufacturer:** Siemens
**Manufacturer code:** 6GK7243-5DX30-0XE0
**EAN:** 4019169211215
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 838.49 €
**Prices and availability valid until:** 2026-08-17 23:59
**Price without VAT (21%):** 692.97 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-6gk7243-5dx30-0xe0--1778322

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.08.2026 | free |
| Pickup points | 06.08.2026 | 1.79 EUR |
| Courier delivery to door | 06.08.2026 | 4.99 EUR |

## Summary description

The Siemens CM 1243-5 (6GK7243-5DX30-0XE0) is a high-performance communication module designed to connect the SIMATIC S7-1200 controller to a PROFIBUS network. Operating as a PROFIBUS DP Master, this module enables seamless integration and data exchange in industrial automation systems. It is a reliable solution for expanding the communication capabilities of S7-1200 systems, ensuring efficient fieldbus connectivity and robust performance in demanding industrial environments.

## Long description

The Siemens CM 1243-5 is a specialized communication module engineered to integrate the SIMATIC S7-1200 controller into a PROFIBUS network. By functioning as a PROFIBUS DP Master, this module allows the S7-1200 system to manage and communicate with various field devices, ensuring reliable data exchange within complex industrial automation architectures. It is designed to provide high-performance connectivity, making it an essential component for expanding the networking capabilities of your automation infrastructure.
Advantages
This communication module offers seamless integration with the existing SIMATIC S7-1200 platform, allowing for straightforward configuration and deployment. Its robust design ensures consistent performance in demanding industrial environments, minimizing downtime and maintaining high data integrity. By acting as a master, it simplifies the management of distributed I/O and other fieldbus devices, providing a scalable solution for growing automation requirements.
Suitable for
Connecting SIMATIC S7-1200 controllers to PROFIBUS DP networks
Managing distributed I/O systems in industrial automation
Integrating legacy field devices into modern control systems
Expanding communication capabilities in manufacturing and process automation
This module is not suitable for applications requiring PROFINET connectivity, as it is specifically designed for the PROFIBUS standard. It is also not intended for use with controllers outside the SIMATIC S7-1200 series.
Key specifications
Interface: PROFIBUS DP Master
Compatibility: SIMATIC S7-1200 series
Communication protocol: PROFIBUS
Mounting: Direct integration into the S7-1200 system
To use the module, install it directly into the designated slot on the SIMATIC S7-1200 controller. Once physically installed, configure the module using the appropriate engineering software, such as TIA Portal, to define the PROFIBUS network parameters and establish communication with the connected field devices. Ensure that the network is properly terminated at both ends to maintain signal integrity.
What to consider before purchase
Verify compatibility with your specific S7-1200 CPU firmware version
Ensure the PROFIBUS network topology meets your distance and device count requirements
Confirm that the engineering software version supports the configuration of this module
Usage recommendations: Always ensure that the PROFIBUS cable is shielded and correctly grounded to prevent electromagnetic interference. Regularly check the diagnostic status via the engineering software to monitor network health and device connectivity.

## FAQ

### How much does the Siemens CM 1243-5 PROFIBUS Master Module for SIMATIC S7-1200 cost, and is it available for purchase?

The price is 838.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 2 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 03.08.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment, Leasing for legal entities. All transactions are 100% secure and encrypted.

### Can Siemens CM 1243-5 PROFIBUS Master Module for SIMATIC S7-1200 be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Siemens products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Siemens service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/1778322/47503684_large.webp