unitronics m90-19-r4 rs485 rs 422 rs232 converter for plc

Unitronics M90-19-R4 Isolated Universal Converter 24 VDC USED.

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UNITRONICS M90-19-R4 ISOLATED CONVERTER 24VDC

UNITRONICS M90-19-R4 Universal RS232 to RS422/RS485 Convector

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