Dorset identification b.v. Reserves the rights to change
specifications without prior notice
12
5. How to setup the decoders
This chapter describes how the decoders can be connected to the PC. This can be done via a direct
connection via RS232 communication or by using the RS485 network interface.
5.1 Direct communication via 3-wire RS232 interface
The LID665A proximity decoders and the LID650A handsfree decoders can communicate via a direct
3-wire RS232 connection.
NOTES:
•
Use a 4-wire double twisted pair cable. Put the Txd and Rxd in 2 separate twisted pairs, where the
other wire of each twisted pairs will be Gnd. This results in 1 twisted pair with Txd and Gnd and 1
twisted pair of Rxd and Gnd.
•
Don’t exceed cable lengths of 14 meters (46ft). Use repeaters when distances are bigger.
The table below shows the RS232 connection to the general used SUBD-9 and SUBD-25 PC plugs
Function
SUBD-9 pinning SUBD-25 pinning
Txd, Transmit RS232
2
3
Rxd, Receive RS232
3
2
Gnd, Ground RS232
5
7
Unit 2
LID650A
ANT610
Unit 1
LID665A
ANT614
Unit 3
LID665A
ANT614
