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Siemens 6ES7241-1CH30-1XB0 SIMATIC S7-1200 Communication Board
The Siemens 6ES7241-1CH30-1XB0 is a SIMATIC S7-1200 Communication Board CB 1241, a compact add-on that plugs directly onto the front of an S7-1200 CPU to add RS485 serial communication. It doesn’t take up any extra panel space since it mounts on the CPU itself rather than the DIN rail. It supports several serial protocols, including Freeport, ASCII, and Modbus RTU, making it a flexible option for connecting to third-party devices, drives, and sensors.
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Categories: PLC Communication Modules
Description
The Siemens SIMATIC S7-1200 Communication Board CB 1241 provides an RS485 interface with a terminal block connection, supporting point-to-point serial communication over cable runs of up to 1,000 meters. It draws very little power from the CPU’s backplane bus, making it an efficient add-on that doesn’t strain the system’s power budget. The board supports several integrated protocol drivers, including Freeport for custom message-based communication, ASCII, Modbus RTU as both master and slave, and USS for communicating with variable frequency drives.
This board is a simple plug-on accessory for the S7-1200 CPU, requiring no separate power supply or mounting hardware of its own. It includes built-in diagnostic functions to help identify communication issues, and it’s rated for a wide operating temperature range, making it suitable for both indoor panel installations and harsher industrial environments.
QTech Safety is a leading supplier of Siemens 6ES7241-1CH30-1XB0 SIMATIC S7-1200 Communication Board in Ireland, offering competitive prices and fast worldwide shipping across United Kingdom (UK), Germany, France, Italy, Spain, United States USA, Canada, Mexico, and Western Australia (Perth). Buy Siemens PLC Communication Modules from one of Ireland’s most trusted industrial safety equipment suppliers.
Features of Siemens 6ES7241-1CH30-1XB0 SIMATIC S7-1200 Communication Board
- Compact communication board that plugs directly onto the S7-1200 CPU
- No extra panel or DIN rail space required
- RS485 interface with terminal block connection
- Supports point-to-point cable runs up to 1,000 meters
- Integrated Freeport protocol driver for custom message-based communication
- Integrated ASCII protocol support (via library function)
- Integrated Modbus RTU master and slave support
- Integrated USS protocol support for variable frequency drives (via library function)
- Built-in diagnostic function for communication troubleshooting
- Very low power draw from the CPU backplane bus
- Wide operating temperature range for flexible installation
- Compact, lightweight design at just 40 g
Technical Specifications of Siemens 6ES7241-1CH30-1XB0
- Product type: CB 1241 RS 485
- Interface type: RS485, terminal block connection
- Input current: 50 mA typical, from backplane bus (5V DC)
- Power loss: 1.5 W typical
- Max cable length: 1,000 m (point-to-point connection)
- Freeport protocol: Supported, max telegram length 1 KB
- ASCII protocol: Supported, via library function
- Modbus RTU master: Supported, up to 247 slave devices (max 32 per segment)
- Modbus RTU slave: Supported
- USS protocol: Supported, via library function
- 3964(R) protocol: Supported, max telegram length 1 KB
- Bits per character: 7 or 8
- Stop bits: 1 (standard) or 2
- Parity options: None, even, odd, mark, or space
- Diagnostics function: Yes
- Degree of protection: IP20
- Approvals: CE, CSA, UL, cULus, FM, RCM, KC, Marine approval
- Operating temperature: -20°C to 60°C (horizontal), -20°C to 50°C (vertical)
- Storage temperature: -40°C to 70°C
- Humidity: Up to 95% at 25°C, non-condensing
- Dimensions (W x H x D): 38 x 62 x 21 mm
- Weight: 40 g approx.
Applications
The Siemens 6ES7241-1CH30-1XB0 SIMATIC S7-1200 Communication Board is commonly used in:
- Connecting variable frequency drives via USS protocol
- Serial communication with third-party devices
- Modbus RTU-based sensor and device networks
- Compact panel designs with limited rail space
- Point-to-point serial links over long cable distances
- Retrofit projects adding serial communication to existing S7-1200 CPUs
Why Choose QTech Safety?
At QTech Safety, we’re more than just a safety supplier we’re your trusted partner in workplace protection and compliance.
Here’s why companies across UK and Ireland (EU) choose us for safety products and training:
- Comprehensive Range of Safety Equipment:
From gas detection and PPE to industrial safety tools, we offer one of the widest selections of trusted brands all at competitive Irish market prices. - Test & Measurement Instruments You Can Trust:
We supply a wide range of test and measurement instruments from the most leading and trusted brands, including industrial sensors, multimeters, oscilloscopes, accelerometers, proximity sensors, and other advanced measurement tools to support accurate diagnostics, condition monitoring, calibration, and maintenance applications. - Expert Health & Safety Training:
We provide professional health and safety training programmes designed to help your workforce stay compliant and confident on the job. - Fast, Reliable Delivery Worldwide:
Whether you’re in Texas United States or Perth Western Australia, our fast delivery service ensures you get your safety equipment quickly and efficiently. - Trusted by European Businesses:
We’re proud to support industries across Europe (UK) with certified safety solutions, expert advice, and responsive customer service.
We Ship Worldwide
At QTech Safety, we supply industrial sensors and instrumentation across Ireland, offering fast and reliable worldwide delivery. Through strong global logistics partnerships, we ensure efficient shipping and professional support for customers in Europe, North America, and Australia.
🡆 Europe (United Kingdom, Ireland, Germany, France, Italy, Spain, and the rest of European Union)
🡆 Australia (Western Australia WA, Queensland QLD, and New South Wales NSW)
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