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PLC SIMATIC S7-1200 CM1241 Communication Module 6ES7 241 6ES7241-1CH32-0XB0 6ES72411CH320XB0 - AliExpress
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Siemens S7-1200 RS232 serial communication using the CM1241 module with the SEND_PTP Function Block - YouTube
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6ES7972-0MS00-0XA0 | Siemens SIMATIC S7-1200 RS232 Teleservice Module | Distrelec International | Electronic Components Distributor
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6ES72411AH320XB0Siemens SIMATIC S7-1200, Communication module CM 1241, RS232, 9-pole D-sub (pin), supports Freeport .
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SIMATIC S7-1200, Digital input SM 1221, 16 DI, 24 V DC, Sink/Source 6ES7221-1BH32-0XB0 – airportcomponents.com
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