AND Weighing Indicator AD-4407 Instruction Manual page 58

Connection Connection Connection Connection
The polarity of signal A and B may vary with different computers.
It is not necessary to ground the SG terminal when using a computer without a signal
ground terminal.
Host computer
AD-4407 #1
Address f06 1
AD-4407 #2
Address f06 2
AD-4407 #32
Address f06 32
14. RS-422/485, Relay Output (OP-03)
RS-422
RDA
RDB
SDA
SDB
SDA
SDB
RDA
RDB
TRM
SDA
SDB
RDA
RDB
TRM
SDA
SDB
RDA
RDB
TRM
Some computers have
terminators inside.
AD-4407 #1
Address f06 1
AD-4407 #2
Address f06 2
AD-4407 #32
Address f06 32
Connect a terminator to the
end connection.
Internal termination resister
is effective when the TRM
terminal is connected to the
RDB terminal.
Page 56
RS-485
Host computer
SDA
SDB
RDA
RDB
TRM
SDA
SDB
RDA
RDB
TRM
SDA
SDB
RDA
RDB
TRM
AD-4407 Weighing Indicator
A
B