37
Reference Manual
00809-0200-4420, Rev HC
Section 5: Operation and Maintenance
July 2015
Operation and Maintenance
RS-485 (serial)
An RS-485 connection supports Modbus RTU protocol. Using this connection type, the Gateway
is wired to an RS-485 bus which typically leads to a serial I/O card or Modbus I/O card (see
Figure 5-3). Up to 31 Gateways can be connected to a single I/O card in this manner.
Figure 5-3. RS-485 LAN Architecture
A. Engineering Station
B. Primary Control Network
C. Secondary Control Network
D.Controller and I/O
E Serial I/O Card
F. RS485 Bus
G. Smart Wireless Gateway
To Next Page
Loading...
