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Port-powered RS-232 4-channel isolator

The TCC-82 provides full electrical isolation for bi-directional serial communication between two RS-232 devices in a compact, industrial grade package. Both sides of an RS-232 connection are isolated optically to provide perfect protection against lightning surges, accidental high voltage shorts, and ground loops. The built-in, wide range isolators are tested to ensure that they can withstand more than 4 KV rms input to output for 1 minute.
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Our Price: $141.78
Moxa RS232 4 channel isolator, DB9F to DB9M w/4KV isolation & 15KV surge