Siemens 6ES7 241-1AA22-0XA0 Programmable Logic Controller Module

Siemens 6ES7 241-1AA22-0XA0 is the EM 241 Modem Module for the SIMATIC S7-200 family, sold as an external modem extension for S7-200 PLCs (often listed under the BIN643 catalog code). It measures 71.2 mm wide, 80 mm high and 62 mm deep, and weighs about 190 g. The module requires an external 24 V DC power supply and provides an internal 5 V rail for its electronics, with typical power consumption around 2.1 W (approximately 70–80 mA depending on supply). This EM 241 modem module adds serial communication capability to a S7-200 installation, enabling the PLC to interface with external devices or networks through its modem interface.