ZKaccess F18, Руководство по установке

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PC RS485 Connection
17
RS485B
RS485A
GND
RS232
1. RS485 communication wires should be a shielded
or twisted pair cable. RS485 communication wires
should be connected in a bus cascade instead of a star
form, to achieve a better shielding effect by reducing
signal reflection during communications.

PC RS485 Connection

Important Notes

Do’s and Dont’s for RS485 connection
3. Adjust the communication speed as needed , The
signal quality vary depending on wiring conditions,
and it maybe necessary to lower the baudrates.
4. The GND Signal may be omitted if and only if the
GND potential difference is less than
±
5V