User’s Manual Smart Digital Power Meter
Instruments.uni-trend.com
34
/
40
8.2.2 PC connect to a single via RS485
· The number in block diagram represents the pin number of DB9 interface.
·
Use direct serial port line to connect PC and the RS232 to RS485 convertor.
·
This connecting method is only support Modbus instruction.
As shown in the following figure.
8.2.2 PC connect to multiple via RS485
· The number in block diagram represents the pin number of DB9 interface.
· Use direct serial port line to connect PC and the RS232 to RS485 convertor.
· A , B port of the RS232 to RS485 convertor parallel connect to A , B port of multiple .
· This connecting method is only support Modbus instruction. The baud rate of the PC must be the same as
that of each , and the IP address of each must be different.
As shown in the following figure.
