Moxa Technologies NPort 6110 - Manual (Page 21)

3-3
Serial master devices talk to multiple
Ethernet slave devices
Link the Serial Master device with Ethernet Slave devices…
Many HMI (Human Machine Interface) systems use a serial interface and are
required to access a discrete DCS (Data Control System). These days however,
more and more DCSs support Ethernet and run under Modbus/TCP slave mode.
In this case, NPort 6110 Modbus Gateway is the ideal solution to link the HMI to
distributed DCSs over an Ethernet network. Up to 4 Modbus/TCP slave devices
are supported by each NPort 6110.
HMI
NPort 6110
DCS DCS
RS-232
Modbus/RTU
Master devices
Modbus/TCPSlave devices
(up to 4)
Ethernet