6ES7241-1CH32-0XB0 Siemens CB 1241 RS485 Communication Board | Original Spare Parts

6ES7241-1CH32-0XB0 — Siemens SIMATIC S7-1200 CB 1241 RS485 Communication Board | 100% Original Spare Parts

As a procurement manager sourcing critical industrial automation components, you need absolute confidence in both product authenticity and delivery reliability. The 6ES7241-1CH32-0XB0 is a factory-sealed, 100% Brand New and Factory Sealed communication board engineered by Siemens for the SIMATIC S7-1200 PLC System. It adds a dedicated RS485 serial port directly to the CPU’s left-side communication slot, enabling robust point-to-point, Modbus RTU, USS, and Freeport protocol communication without consuming a signal board slot.

Designed to address the persistent challenge of legacy serial device integration in modern PLC System architectures, the 6ES7241-1CH32-0XB0 bridges the gap between contemporary S7-1200 controllers and field devices such as variable frequency drives, barcode readers, and SCADA terminals. Whether you are managing a brownfield retrofit in Oil & Gas or commissioning a new Power Plant control loop, this Original New Control Module delivers the galvanic isolation and protocol flexibility your application demands.

Backed by Siemens’ engineering heritage and available as a verified Original New Spare Part, this board is the definitive choice for engineers who cannot afford downtime. Contact us today for pricing and lead time — fast global shipping is available.

Typical Application Scenarios

• Oil & Gas: Integrates S7-1200 PLCs with Modbus RTU field instruments (flow meters, pressure transmitters) over long-distance RS485 runs up to 1,000 m, eliminating costly signal converters.
• Power Plants & Utilities: Enables USS protocol communication between S7-1200 Control Modules and Siemens SINAMICS/MICROMASTER drives for precision motor speed regulation.
• Water & Wastewater Treatment: Supports Freeport ASCII communication with HMI panels and barcode scanners in environments where Ethernet infrastructure is unavailable or cost-prohibitive.
• Automotive Manufacturing: Facilitates point-to-point serial links between S7-1200 PLC Systems and legacy production line equipment during phased modernization projects.
• Building Automation & HVAC: Connects S7-1200 controllers to BACnet MS/TP or proprietary RS485 HVAC controllers, extending the life of existing building management systems.

Core Features & Technical Advantages

1. Robust Galvanic Isolation (500 V AC): Port-to-backplane isolation protects the CPU from ground loops and transient surges common in heavy-duty industrial environments.
2. Precision Multi-Protocol Support: Natively handles Modbus RTU (Master/Slave), USS, Freeport (ASCII), and Point-to-Point — all configurable via TIA Portal without additional software licenses.
3. Wide Baud Rate Range: Supports 300 bps to 187,500 bps, ensuring compatibility with both legacy slow-speed devices and modern high-throughput serial peripherals.
4. Built-in Switchable Termination & Bias: Integrated 390 Ω termination and bias resistors eliminate the need for external network termination components, simplifying panel wiring.
5. Compact CPU-Slot Integration: Mounts directly into the S7-1200 CPU communication board slot — no DIN rail space consumed, no additional power supply required.
6. Real-Time Tx/Rx LED Diagnostics: Dedicated green Tx and Rx indicators provide instant visual confirmation of serial communication activity, accelerating fault isolation on the plant floor.

Technical Specifications & Selection Guide

Selection Tip: If your application requires RS232 instead of RS485, consider the CB 1241 RS232 variant (6ES7241-1AH32-0XB0). For applications requiring two independent serial ports, pair this board with a CM 1241 communication module.

Logistics & Professional Service

• ✅ Condition: 100% Original and Brand New — every unit is factory sealed and traceable to Siemens’ authorized supply chain.
• ✅ Shipping: 2-Day Express Shipping available to major global destinations; standard air freight typically delivers within 5-7 business days worldwide.
• ✅ Warranty: 1-Year Replacement Warranty against manufacturing defects — no questions asked.
• ✅ EOL & Legacy System Support: We specialize in sourcing discontinued and hard-to-find Siemens Industrial Automation Spare Parts, including end-of-life S7-200 and S7-300 series components.
• ✅ Documentation: Datasheet, wiring diagrams, and TIA Portal configuration guides available upon request.
• ✅ Global Reach: Export documentation, country-of-origin certificates, and customs support provided for all international shipments.

FAQ — Frequently Asked Questions

Q1: What is the price of the 6ES7241-1CH32-0XB0?
Pricing for the 6ES7241-1CH32-0XB0 varies based on order quantity and current market availability. As an authorized distributor of Siemens Industrial Automation Spare Parts, we offer competitive pricing with volume discounts. Please contact our sales team at sale@ninermas.com or submit an inquiry through our website for a formal quotation within 24 hours.

Q2: What is the lead time for the 6ES7241-1CH32-0XB0?
For in-stock units, we offer 2-Day Express Shipping. Standard international delivery is 5-7 business days. For large-volume orders or special configurations, lead time is typically 7-14 business days. Contact us to confirm real-time stock availability.

Q3: Can you provide a Datasheet or technical documentation for the 6ES7241-1CH32-0XB0?
Yes. The official Siemens datasheet, SIMATIC S7-1200 system manual, and TIA Portal configuration guide are available upon request. Email sale@ninermas.com with your inquiry and we will respond within one business day.

Q4: Is the 6ES7241-1CH32-0XB0 compatible with all S7-1200 CPU models?
This Communication Board is compatible with all SIMATIC S7-1200 CPU models except the CPU 1211C, which does not have a communication board slot. It is fully supported under TIA Portal V13 SP1 and later firmware versions.

Q5: Can you provide a Certificate of Origin or authenticity documentation?
Absolutely. We provide full traceability documentation including Certificate of Origin, packing lists, and Siemens-branded packaging photos upon request. All units are 100% Original and Brand New sourced through verified supply channels.

Q6: Does the 6ES7241-1CH32-0XB0 support Modbus TCP or only Modbus RTU?
The CB 1241 RS485 supports Modbus RTU (serial) only. For Modbus TCP over Ethernet, the S7-1200 CPU’s built-in PROFINET port should be used in conjunction with the appropriate Modbus TCP library in TIA Portal.

© 2026 NINERMAS COMPANY LIMITED. All rights reserved. Original Source: https://ninermas.com | Contact: sale@ninermas.com | +0086 187 5021 5667