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Amazon.com: Siemens 6ES7 241-1AH32-0XB0 SIMATIC S7-1200, Communication Module cm 1241, RS232, 9 PIN SUB D (Male), Supports Message Based Freeport : Electronics
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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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Siemens - 6ES72411AH320XB0 - PLC Expansion Module, Communication, RS232, CM 1241, SIMATIC S7-1200 Series - RS
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6ES7241-1CH32-0XB0 SIEMENS SIMATIC S7-1200, Communication Module cm 1241: Amazon.com: Industrial & Scientific
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