User's Manual

Table Of Contents

A9240-A-004-485 User Manual

3.3 RS-485 Cable Interface

A typical RS-485 network is formed by two wires. A9240-A-004-485 RFID reader’s

RS-485 interface uses RJ-45 type connector. Proper wire connections should be made

before inserting the cable into the RS-45 connector. It is recommended that signal wire be

twisted with ground wire as shown in the diagram below to minimize noise and interference.

Pin 8 (B) of the RJ-45 connector should be used for the non-inverting RS-485 data signal.

Pin 2 (O) of the RJ-45 connector should be used for the inverting RS-485 data signal.

Ground should be connected to Pin 7 (BW) and Pin 1 (OW) of the RJ-45 connector.