Table of contents
1 Introduction .................................................................................................................. 4
1.1 Intended audience ................................................................................................. 4
1.2 Before you start ..................................................................................................... 4
2 Overview ....................................................................................................................... 5
2.2 The Modbus adapter ............................................................................................. 5
2.3 Compatibility .......................................................................................................... 5
3.1 Communication mode ............................................................................................ 6
3.3 RS-232 interface .................................................................................................... 6
3.4 RS-422 interface .................................................................................................... 7
3.5 RS-485 interface .................................................................................................... 7
3.6 Bias resistors ......................................................................................................... 7
3.9 Cable requirements ............................................................................................... 8
3.10 Network topology ................................................................................................... 8
4 RS485 Modbus adapter ............................................................................................. 10
4.1 Main features ....................................................................................................... 10
4.2 Physical dimensions ............................................................................................ 10
4.3 Mounting .............................................................................................................. 11
4.4 Technical data ..................................................................................................... 11
5.1 Overview .............................................................................................................. 14
6 Data access ................................................................................................................ 16
6.1 Access levels ....................................................................................................... 16
6.3 Modbus Data table .............................................................................................. 16
7 Troubleshooting ......................................................................................................... 17
8 Appendix ..................................................................................................................... 20
2 - Table of contents RS-485