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Amazon.com: DTECH RS232 to RS485 / RS422 Serial Communication Data Converter Adapter Mini-Size : Electronics
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Industrial grade isolated RS232 TO RS485 converter, magnetical isolation, 600W lightning-proof & anti-surge
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RS232 To RS485 Converter (B), Active Digital Isolator, Rail-Mount support, 600W Lightningproof & Anti-Surge, Multi-isolation protection
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