Tripp Lite Keyspan High Speed USB to Serial Adapter - serial adapter - USB - RS-232 - USA-19HS - USB Adapters - CDW.com
Single Port USB 2.0 to RS-422 / RS-485 DB-9 Serial Adapter - Coolgear
Ativa USB 2.0 to Serial Adapter 1 RS 232 DB9 Black 26847 - Office Depot
USB to RS485-RS422 converter with FTDI Chip and USB Cable
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