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Siemens 6ES7 241-1CH30-1XB0 SIMATIC S7-1200, Communication Communication Board CB 1241, RS485, Screw Connector Supports Message Based Freeport: Amazon.com: Industrial & Scientific
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Siemens SIMATIC S7-1200 CB 1241, RS485, 50mA, front view | SIMATIC S7-1200 PLC COMM Modules - Layout
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Siemens - 6ES72411AH320XB0 - PLC Expansion Module, Communication, RS232, CM 1241, SIMATIC S7-1200 Series - RS
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