User's Manual

Lyngsoe Systems RFID Reader and Exciter PRX23
950409 Page 4 of 8
Figure 3- PRX23 with the connector cover removed
2.1.2. RS485 Connection
For the RS485 connection use a standard Cat5 Ethernet cable and RJ45 plug. Crimp the
connector using the recommended tool and the following color scheme: pin 1 - Wh/Or; pin
2 – Or; pin 3 – Wh/Gr; pin 4 – Bl; pin 5 – Wh/Bl; pin 6 – Gr; pin 7 – Wh /Br; pin 8 – Br.
PRX23 has a single RS485 port with two RG45 jacks connected in parallel for ease of
installation (when several PRX23 are attached to an RS485 network). Insert the RS485
connector into one of the RS485 Jacks. The default serial communications parameters
are:
• Bits per second: 19200
• Data bits: 8
• Parity: None
• Stop bits: 1
• Flow Control: None
Up to 99 PRX23s can be connected to an RS485 serial bus (Figure 4). Each reader has its
own serial address.
Figure 4 – PRX23 on RS485 network
Controller
PRX23
Address=1
PRX23
Address=n
(n<100)
RS485 bus
Power
In Jack
Ethernet
Port
RS485
Jacks
Aux. Power
Outputs
Data
LED
Power
LED
USB