A&D Weighing AD-4407 - Manual (Page 58)

Page 56 AD-4407 Weighing Indicator
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.
RS-422 RS-485
14. RS-422/485, Relay Output (OP-03)
RDA
RDB
SDA
SDB
SDA
SDB
RDA
RDB
TRM
SDA
SDB
RDA
RDB
TRM
SDA
SDB
RDA
RDB
TRM
SDA
SDB
RDA
RDB
TRM
SDA
SDB
RDA
RDB
TRM
A
B
Some computers have
terminators inside.
Connect a terminator to the
end connection.
Internal termination resister
is effective when the TRM
terminal is connected to the
RDB terminal.
SDA
SDB
RDA
RDB
TRM
AD-4407 #32
Address
f06 32
AD-4407 #32
Address
f06 32
AD-4407 #2
Address
f06 2
AD-4407 #2
Address
f06 2
AD-4407 #1
Address
f06 1
AD-4407 #1
Address
f06 1
Host computer Host computer