Banner SureCross DX80 Wireless Networks - Manual (Page 7)

P/N 136689
7
Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
DX80
Reference Guide
Network Basics
The DX85 Expanded Remote I/O device and many other Modbus slave devices cannot be used on a network without a Modbus master,
so the DX80 Gateway includes Modbus master functionality. Because a Modbus network can only have one master, the network cannot
include the PLC if the Gateway must have direct control over DX85 devices (see Network 2) .
The Gateway is configured with a table of external connections that allow the DX85 Expanded I/O devices, as Modbus slaves, to
communicate with the wireless Nodes .
For examples of additional Modbus RTU configurations, please refer to Banner document p/n 133601, DX80 System Layouts .
Network 2: Gateway as Modbus Master
Wireless Network
Device 1
Wireless Master
Device (Device 0)
Modbus Network
Slave ID 2 Slave ID 3
Modbus
Master
RS 485
Cable
Device 2