| Product Type | S7-1200 Communication Module |
| Product Model | 6ES7241-1CH32-0XB0 |
| Input current | Current consumption, maximum value 220 mA; backplane bus, DC 5 V |
| Product Dimensions | 30 MM × 100 MM × 75 MM |
| Power Supply Voltage | Rated value (DC) 24 V Allowable range, lower limit (DC) 20.4 V Allowable range, upper limit (DC) 28.8 V |
| Weight | 155 g |
Supports Modbus RTU Master/Slave Communication:The module can be configured as a Modbus RTU Master or Slave, enabling seamless communication with Modbus-enabled devices such as drives, meters, sensors, and HMIs.
RS-485 Physical Interface (9-pin Sub-D):Equipped with a standard RS-485 interface (2-wire or 4-wire mode selectable), supporting long-distance transmission (up to 1200 meters) with strong noise immunity—ideal for harsh industrial environments.
Dedicated Serial Port, No CPU Port Occupied:As an expansion module, it does not use the CPU’s integrated PROFINET or programming port, allowing parallel communication and enhanced system flexibility.
Plug-and-Play with Auto-Recognition:Simply install the module to the right of the S7-1200 CPU; it is automatically detected by the system upon power-up—no external power or jumper settings required.
Fully Integrated in TIA Portal Engineering Environment:Configurable in STEP 7 Basic/Professional (TIA Portal V13 and higher) using built-in Modbus instruction blocks (e.g., MB_COMM_LOAD, MB_MASTER, MB_SLAVE) for fast and efficient programming.
Configurable Baud Rates and Communication Parameters:Supports baud rates from 1200 to 115200 bps, with selectable data bits, stop bits, and parity (even, odd, none), ensuring compatibility with most serial devices.
