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6ES7241-1CH32-0XB0 SIEMENS SIMATIC S7-1200, Communication Module cm 1241: Amazon.com: Industrial & Scientific
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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 SIMATIC S7-1200 CM 1241, RS232, 24VDC, side view | SIMATIC S7-1200 PLC COMM Modules - Layout
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