Tripp Lite Keyspan USA-19HS USB to RS-232 Adapter

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Tripp Lite USA-19HS (stock photo)

Overview

USB to RS-232 adapter with a male DE9 jack and standard DTE RS-232 pinout, meant to connect to a DCE.

Wiring Diagram

DE9 Pin Function Direction
1 DCD PC ← device
2 RXD PC ← device
3 TXD PC → device
4 DTR PC → device
5 GND PC ↔ device
6 DSR PC ← device
7 RTS PC → device
8 CTS PC ← device
9 RI PC ← device
(shield) shield PC ↔ device

Online Resources

Keyspan RS232 to USB-A Adapter, DB9, 3-ft Cable | Eaton

Buy RS232 USB to RS232C Serial Port Adapter - CNC Specialty Store