
Siemens 6ES7241-1CH30-1XB0 CB 1241 RS485 Communication Board
This communication board facilitates RS485 connectivity for SIMATIC S7-1200 controllers. It supports Freeport mode via a terminal block interface for flexible integration.
Quick Facts
- Part number
- 6ES7241-1CH30-1XB0
- Brand
- Siemens
- Category
- Communication & Networking
- Product type
- CB 1241 RS485 communication board
- Lifecycle
- Active Product
- Dimensions
- 8.00 x 5.00 x 2.7 cm
- Net weight
- 0.031 Kg
- Source category
- CB 1241 RS485 communication board
Product Overview
The Siemens 6ES7241-1CH30-1XB0 is a communication board designed for the SIMATIC S7-1200 series. It provides essential RS485 connectivity options for industrial automation projects requiring serial data exchange. Review Siemens 6ES7241-1CH30-1XB0 as CB 1241 RS485 communication board with source category CB 1241 RS485 communication board, recorded lifecycle Active Product, and submitted model identity.
This module enables Freeport mode operation, allowing custom protocol implementation beyond standard MPI or PROFIBUS DP. Engineers can utilize this flexibility for specialized device integration and legacy system connections.
Technical Review Notes
- Interface Type: RS485 serial communication standard for reliable data transmission over longer distances in industrial environments. Keep dimensions 8.00 x 5.00 x 2.7 cm and net weight 0.031 Kg unchanged while comparing project documents and product image evidence.
- Connection Method: Terminal block connector design ensures secure wiring and easy maintenance during installation processes.
- Protocol Support: Freeport mode capability allows users to define custom communication protocols for specific application needs.
- Controller application context: Designed specifically for mounting on SIMATIC S7-1200 CPU modules to expand communication capabilities.
- Physical Dimensions: Compact form factor measuring 8.00 x 5.00 x 2.7 cm fits within standard control cabinet spaces.
- Net Weight: Lightweight construction at 0.031 Kg minimizes additional load on the controller housing structure.
Model Identification
- Brand Identification: Manufactured by Siemens, a leading provider of industrial automation and digitalization technologies worldwide.
- Product Line: Part of the SIMATIC S7-1200 family, known for modular scalability and performance efficiency.
- Component Type: Classified as a Communication Board (CB), distinct from CPU modules or signal boards.
- Model Specifics: The CB 1241 designation indicates the specific RS485 variant within the broader communication portfolio.
Technical Parameters
| Product type | CB 1241 RS485 communication board |
|---|---|
| Lifecycle | Active Product |
| Dimensions | 8.00 x 5.00 x 2.7 cm |
| Net weight | 0.031 Kg |
| Source category | CB 1241 RS485 communication board |
Parameters are factual source fields retained for model review.
Parameter Review
- Recorded Dimensions: The physical size is listed as 8.00 x 5.00 x 2.7 cm for spatial planning.
- Weight Specification: Net weight is documented as 0.031 Kg, aiding in logistics and handling assessments.
- Lifecycle Status: Current lifecycle status is recorded as Active Product, indicating ongoing production or support review details.
- Product Class: Categorized as A: Standard product, which may be subject to specific review guidelines if applicable.
- Interface Standard: RS485 interface supports differential signaling for noise immunity in electrically noisy industrial settings.
Catalog Classification
Image & Label Review
- Visual Inspection: Verify the terminal block orientation and labeling matches the technical documentation provided by the manufacturer.
- Connector Details: Check that the RS485 connector pins are intact and free from visible physical damage or corrosion.
- Label Clarity: Ensure the part number label 6ES7241-1CH30-1XB0 is clearly legible and correctly printed on the unit.
- Mounting Slots: Confirm that the mounting slots align with the SIMATIC S7-1200 CPU module attachment points.
Product Image Gallery

Inquiry Preparation
- Project Requirements: Define the specific serial communication protocols needed for your target devices before submitting the inquiry.
- Technical Specifications: Review the Freeport mode parameters to ensure they meet your custom communication needs.
- Quantity Needs: Determine the exact quantity of boards required for your current automation project scope.
- Documentation Request: Ask for updated datasheets or manual excerpts if specific installation details are unclear.
Category Context
Sector Placement: This component falls under Automation technology, specifically within the communication subsystems category.
Function Role: It serves as a critical interface element for expanding network connectivity in PLC-based systems.
Review Notes
- Source Verification: Cross-reference the part number with documented Siemens catalogs to confirm current technical specifications.
- Parameter Accuracy: Validate dimensions and weight against recent engineering drawings for precise mechanical integration planning.
- Lifecycle Check: Monitor lifecycle announcements to anticipate future supply chain considerations for long-term projects.
- Inquiry Focus: Emphasize technical application context and project-specific requirements when contacting inquiry team for accurate responses.



