# Siemens CM 1242-5 PROFIBUS Slave Communication Module for SIMATIC S7-1200

**URL:** https://aio.lv/en/product--siemens-6gk7242-5dx30-0xe0--1779160
**Data updated:** 2026-05-18 02:40 (EEST)
**Category:** Server Parts & Components
**Manufacturer:** Siemens
**Manufacturer code:** 6GK7242-5DX30-0XE0
**EAN:** 4019169211222
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 524.99 €
**Prices and availability valid until:** 2026-08-21 23:59
**Price without VAT (21%):** 433.88 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--siemens-6gk7242-5dx30-0xe0--1779160

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 05.08.2026 | free |
| Pickup points | 10.08.2026 | 1.79 EUR |
| Courier delivery to door | 10.08.2026 | 4.99 EUR |

## Summary description

The Siemens CM 1242-5 is a high-performance communication module designed to connect the SIMATIC S7-1200 controller as a PROFIBUS DP slave device. It enables seamless integration into industrial automation networks, supporting reliable data exchange and efficient process control. This module is essential for expanding the connectivity of S7-1200 systems in complex manufacturing environments, ensuring robust communication and compatibility with standard PROFIBUS fieldbus systems.

## Long description

The Siemens CM 1242-5 is a specialized communication module engineered to integrate the SIMATIC S7-1200 controller into PROFIBUS DP networks as a slave device. This module serves as a critical interface for industrial automation, allowing the S7-1200 system to communicate reliably with higher-level controllers or other fieldbus components. By facilitating standardized data exchange, it ensures that your automation infrastructure remains efficient and scalable within complex manufacturing environments.
Advantages
This communication module offers seamless integration with the existing SIMATIC S7-1200 hardware architecture, requiring minimal configuration to establish a stable PROFIBUS connection. It provides high-speed data transmission and robust performance, which are essential for maintaining real-time process control in demanding industrial settings. The compact design allows for easy installation directly onto the controller, saving valuable space in control cabinets while maintaining high standards of communication reliability.
Suitable for
Connecting SIMATIC S7-1200 controllers to PROFIBUS DP networks
Industrial automation systems requiring slave-to-master communication
Expanding existing fieldbus networks in manufacturing plants
Process control applications where reliable data exchange is critical
When it may not be suitable
This module is specifically designed for PROFIBUS DP slave functionality and will not act as a PROFIBUS master. It is not compatible with controllers outside the SIMATIC S7-1200 series or for protocols other than PROFIBUS.
Key specifications
Interface: PROFIBUS DP slave
Compatibility: SIMATIC S7-1200 series
Communication standard: PROFIBUS fieldbus
Mounting: Integrated S7-1200 system mounting
How to use
To install the module, ensure the S7-1200 controller is powered down. Attach the module to the designated communication port on the side of the CPU. Once physically connected, configure the module within the TIA Portal engineering software by adding it to the hardware configuration. Define the PROFIBUS address and communication parameters to match your network requirements. After downloading the configuration to the CPU, the module will begin exchanging data with the PROFIBUS master.
What to consider before purchase
Verify that your existing network architecture utilizes PROFIBUS DP
Ensure your S7-1200 firmware version supports the module
Confirm that the module is intended for use as a slave device
Check available space in your control cabinet for module installation
Usage recommendations
Always ensure that the PROFIBUS network is properly terminated at both ends to prevent signal reflections and communication errors. Regularly check the diagnostic LEDs on the module to monitor network status and identify potential connection issues during operation.

## FAQ

### How much does the Siemens CM 1242-5 PROFIBUS Slave Module for SIMATIC S7-1200 cost, and is it available for purchase?

The price is 524.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 1 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 05.08.2026 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. All transactions are 100% secure and encrypted.

### Can Siemens CM 1242-5 PROFIBUS Slave 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

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