User Manual

NPort W2250/2150 Plus User’s Manual Choosing the Proper Operation Mode
4-5
Pair Connection Mode
In Pair Connection mode, two NPort
W2250/2150 Plus servers work together to
remove the 15-meter distance limitation
imposed by the RS-232 interface. One
server is arbitrarily designated the “master”
and the other as the “slave”—it does not
matter which is which as long as there is
one of each. One server is connected from
its RS-232 port to the COM port of a PC or
another type of computer, such as a
hand-held PDA that has a serial port; the
other server is connected to the serial
device through its RS-232 port.
The two servers are then connected to each
other over the network.
TCP/IP
Ethernet
Pair Connection Mode
RS-232/422/485
Device
RS-232/422/485
Device
NPort 6000
Series “Slave”
NPort 6000
Series “Master”
Ethernet Modem Mode
Ethernet Modem mode is designed for use with legacy
operating systems, such as MS-DOS, that do not
support TCP/IP Ethernet. By connecting the properly
configured NPort W2250/2150 Plus serial port to the
MS-DOS computer’s serial port, it is possible to use
legacy software to transmit data over the Ethernet when
the software was originally designed to transmit data
over a modem.
TCP/IP
Ethernet
Ethernet Modem Mode
RS-232