Quatech USB to RS-232/422/485 Isolated Converter SSU2-400I - Manual (Page 23)

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A A p p p p e e n n d d i i x x A A
Pin outs and Connector
□ □ □
USB Layout Diagram
Type A USB Connector
Type B USB Connector
□ □ □ RS-232 Pin Assignment
The pin assignment scheme for a 9-pin male connector is given below.
PIN 1 : DCD PIN 2 : RXD PIN 3 : TXD PIN 4 : DTR
PIN 5 : GND PIN 6 : DSR
PIN 7 : RTS PIN 8 : CTS
PIN 9 : X
□ □ □ RS-232 Wiring Diagram