Appendix A - Pin Outs And Cable Wiring; Usb Layout Diagram; Rs-232 Pin Assignment - Quatech USB to RS-232/422/485 Isolated Converter SSU2-400I Operation Manual

USB Layout Diagram

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Type A USB Connector
Type B USB Connector
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□ RS-232 Pin Assignment

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The pin assignment scheme for a 9-pin male connector is given below.
PIN 1 : DCD
PIN 5 : GND
PIN 9 : X
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□ RS-232 Wiring Diagram
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Pin outs and Connector
PIN 2 : RXD
PIN 6 : DSR
22
A p p e n
A p p e n
PIN 3 : TXD
PIN 7 : RTS
d i x A
d i x A
PIN 4 : DTR
PIN 8 : CTS