Rs485 Connection (Multiple Units) - IDTECK Star LX505 User Manual

9.2.2 RS485 Connection (Multiple Units)

An RS485/RS232 converter is required to use RS485 communication between multiple
LX505 and a host PC. Please follow the instructions below.
First, connect all RS485 port of the LX505 units in parallel.
(max of 32 LX505 Units can be connected)
Connect RS485-RTX (+) (the Yellow wire) of one LX505 to RS485-RTX (+) (the
1.
Yellow wire) of another LX505.
Connect RS485-RTX (-) (the Gray wire) of one LX505 to RS485-RTX (-) (the Gray
2.
wire) of another LX505.
Set different COMM IDs for each LX505.
3.
Second, connect one of RS485 ports of the LX505 units to the
RS485/RS232 converter.
Connect RS485-RTX (+) (the Yellow wire) of one LX505 to RS485-A port of the
1.
converter.
Connect RS485-RTX (-) (the Gray wire) of one LX505 to RS485-B port of the
2.
converter.
Plug the RS232 (9-pin connector) of the converter into the COM1 or COM2 port of
3.
the host PC.
Install and run the LX505 application software.
4.
Figure: RS485 Communication between multiple LX505 units and a host PC
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