Siemens 6ES7241-1AH32-0XB0 CM 1241 RS232 Communication Module 24V DC

9-pin RS232 communication module for SIMATIC S7-1200 systems with Freeport and Modbus RTU support.

The Siemens 6ES7241-1AH32-0XB0 is a CM 1241 point-to-point communication module designed for the SIMATIC S7-1200 series. It provides an RS232 interface (V.24) for serial communication with third-party devices such as barcode scanners, drives, printers, and legacy instrumentation. The module supports versatile protocols including Freeport (user-defined), ASCII, Modbus RTU (master and slave), 3964(R), and USS drive protocol, enabling reliable data exchange in industrial automation.

Applications

• Legacy system integration with RS232 devices and instrumentation

• Data exchange between S7-1200 controllers and serial equipment

• Communication with barcode scanners, RFID readers, and printers

• SCADA system connectivity and data collection from remote devices

• Process control and factory automation serial networking

Key Features

• Single-channel RS232 interface (V.24) with 9-pin D-sub male connector

• Supports Freeport (user‑defined), ASCII, Modbus RTU (master/slave), 3964(R), and USS drive protocols

• Configurable communication parameters: baud rates, data bits (7/8), parity (none, even, odd, mark, space), stop bits (1/2)

• Maximum 1 kbyte telegram length and 10 m cable length for point‑to‑point connections

• LED indicators for power, transmission, and receive activity

• TIA Portal integration with STEP 7 Basic for simple hardware configuration and pre‑built function libraries

Technical Specifications

• Supply voltage: 24V DC rated (20.4–28.8V DC)

• Current consumption: max. 200 mA

• Power loss: typ. 1.1 W

• Cable length: max. 10 m point‑to‑point

• Operating temperature: -20°C to +60°C (horizontal), -20°C to +50°C (vertical)

• Protection rating: IP20

• Dimensions (W x H x D): 30 × 100 × 75 mm

• Net weight: 0.152 kg (152 g)

System Integration

• PLC Compatibility: All SIMATIC S7-1200 series CPUs (1211C, 1212C, 1214C, 1215C, 1217C)

• Mounting: Plugs directly into S7-1200 left‑side communication slot (no additional base required)

• Configuration: TIA Portal (STEP 7 Basic V10.5 or higher)

• Function Libraries: Pre‑built communication function blocks available in TIA Portal

Related Products

• *S7-1200 CPU*: Siemens 6ES7215-1AG40-0XB0 CPU 1215C – system core

• RS485 Version: Siemens 6ES7241-1CH30-0XB0 CM 1241 RS485 – alternative interface

• Serial Cable: Siemens 6XV1440-2KH32 – shielded RS232 connection cable

• Panel HMI: Siemens 6AV2123-2GB03-0AX0 KTP700 Basic – operator interface

PLC ERA is an independent industrial automation distributor. Products are sourced from established supply channels and inspected before shipment. International shipping available.