3onedata USB485 Series Manual de instruções - Página 8
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(2) In theory, RS-485 bus of USB485× at most can be connected with 32 standard 485
devices, but affected by load and communication distance, actual number of at most connecting
with devices may not reach the numerical value (generally more than 20).
V. Definition of Serial Port Pin
USB232:USB to RS-232 converter
USB485B:USB to RS-485 converter
USB485C: USB to RS-485/422 converter
RS-232：
1 :DCD 2: RXD 3 :TXD 4 :DTR 5: GND
6 :DSR 7 :RTS 8: CTS 9 :RI
RS-485：
1 :D-(B) 2 :D+(A) 5: GND
RS-422：
1: T- 2: T+ 3 :R+ 4: R- 5: GND
VI. Installation of Driver Program
Method I: (Recommended)
Enter CD catalog-Setup file folder and execute USB_drv.exe automatic installation wizard
program, and click Next.
USB485× driver program will be installed automatically in your system.
DB9M (male connector, needle type)