220mA Simatic S7 1200 Cpu PLC 6ES7241-1CH32-0XB0 CM 1241 RS422/485

SIMATIC S7-1200 PLC 6ES7241-1CH32-0XB0 CM 1241 RS422/485

I. Product Description:

The SIMATIC 6ES7241-1CH32-0XB0 is a communication module in the SIMATIC SIMATIC S7-1200 series; its full model number is CM 1241 RS422/485. It is used to expand the S7-1200 PLC with an independent RS422/RS485 serial communication interface, enabling it to exchange data with field devices that support serial protocols, such as variable-frequency drives, instruments, and barcode scanners.

Interface Type RS422 or RS485 (9-pin Sub-D female connector)

Supported Protocols: Freeport (Freeport/ASCII), Modbus RTU (Master/Slave), USS

Transmission Distance: Up to 1,000 meters

Power Supply: Powered by the S7-1200 CPU via the backplane bus

Current Consumption (5 V DC): 220 mA

II. Product Specifications:

SIMATIC 6ES7241-1CH32-0XB0｜SIMATIC S7-1200 CM 1241 RS485 Communication Module 

Communication Standard: RS485;
Transmission Rate: 300 bit/s to 38.4 kbit/s;
Communication Modes: Freeport, ASCII, USS, and Modbus RTU;
USS Communication: Supported;
Modbus RTU Master: Supported;
Modbus RTU Slave: Supported;
Freeport Communication: Supported;
ASCII Communication: Supported;
Data Bits: 7 or 8;
Stop Bits: 1 or 2;
Parity: None, even, or odd;
Communication Distance: Up to 1,000 m, depending on transmission rate, cable type, and installation conditions;
Point-to-Point Communication: Supported;
Serial Communication Connections: Supports RS485 point-to-point communication;
Hardware Handshake: Not required for standard RS485 communication;
Isolation: RS485 interface electrically isolated from the backplane bus;
Connector Type: 9-pin D-sub connector;
Power Supply: Supplied through the S7-1200 backplane bus;
Backplane Bus Current Consumption: Approximately 30 mA at 5 V DC;
Typical Power Loss: Approximately 1.5 W;
Diagnostic Functions: Module and communication diagnostics supported;
Status Indication: LED status indication for module and communication status;
Engineering Software: STEP 7 / TIA Portal;
Configuration: Parameterizable through the TIA Portal engineering environment;
Programming Interface: Configured and controlled through the S7-1200 CPU user program;
System Compatibility: SIMATIC S7-1200 automation systems;
Mounting: Direct mounting to the right side of a compatible S7-1200 CPU or signal module;
Protection Rating: IP20;
Operating Temperature: -20 to 60 °C;
Storage / Transport Temperature: -40 to 70 °C;
Maximum Relative Humidity: 95% at 25 °C, non-condensing;
Dimensions (W × H × D): Approximately 30 × 100 × 75 mm;
Net Weight: Approximately 150 g;
Typical Applications: RS485 serial communication, Modbus RTU networks, USS drive communication, ASCII device communication, barcode scanners, weighing systems, serial sensors, motor drives, and industrial automation systems based on the SIMATIC S7-1200 platform

III. Technical Parameters:

SIMATIC S7-1200, Communication module CM 1241, RS422/485, 9-pole D-sub (socket) supports Freeport

IV. Industries Served:

SIMATIC 6ES7241-1CH32-0XB0 Industry Applications of the CM 1241 Communication Module

Most typical applications. In industries such as chemicals, pharmaceutical, and water treatment, it is used to connect various types of smart instruments, such as flow meters, temperature controllers (e.g., Fuji thermometers), and pressure transmitters. It collects data via the Modbus RTU protocol to enable precise process monitoring

In large e-commerce distribution centers or automated high-bay warehouses, this module can be used to connect devices such as barcode scanners, RFID readers, and conveyor line PLCs. By reading barcode or label information via the Freeport or ASCII protocols, it enables goods tracking and automated sorting

V. Why choose us?

We source directly from China’s Tier 1 channels, eliminating all middleman markups. This means you get competitive prices close to factory cost, and we pass those savings on to you as profit or budget flexibility for your projects.

Don’t let stockouts slow down your project schedule. For popular models like the S7-1500 and G120, which are frequently purchased, we always maintain high levels of in-stock inventory. The moment you place your order, the goods are already ready in our warehouse. Within 1–3 business days, you’ll receive the tracking number for your international express shipment. Whether your factory is in the Middle East, Southeast Asia, or across Europe and the Americas, our global logistics network helps you reclaim valuable time.

From precision manufacturing in Europe to oil and gas fields in the Middle East, and electronics assembly lines in Southeast Asia, our products and solutions have withstood the test of demanding operating conditions around the world. We deeply understand the unique characteristics of each market, and this global experience is the guarantee of your project’s successful implementation.

We don’t just sell products—we provide the technical support that keeps your equipment running smoothly. Whether you’re facing challenges with product selection, encountering commissioning errors, or dealing with unexpected failures, our technical team is always on standby to ensure your production line issues receive a professional response—not just a voicemail.

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