A&D AD-4405 Manual De Usuario
AD-4405 Weighing Indicator
Page
67
Switching Between RS
Switching Between RS
Switching Between RS
Switching Between RS-
-
-
-422/RS
422/RS
422/RS
422/RS-
-
-
-485
485
485
485
Switching between RS-422/RS-485 is made with the slide switch (S1) on the OP-03
board.
Connection
Connection
Connection
Connection
The polarity of signals 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
17. RS-422/RS-485, Relay Output(OP-03)
RDA
RDB
RDB
SDA
SDB
SDA
SDB
SDB
RDA
RDB
RDB
TRM
SDA
SDB
SDB
RDA
RDB
RDB
TRM
SDA
SDB
SDB
RDA
RDB
RDB
TRM
SDA
SDB
SDB
RDA
RDB
RDB
TRM
SDA
SDB
SDB
RDA
RDB
RDB
TRM
A
B
Some computers have
terminators inside.
terminators inside.
SDA
SDB
SDB
RDA
RDB
RDB
TRM
AD-4405 #32
Address F06=32
Address F06=32
AD-4405 #32
Address F06=32
Address F06=32
AD-4405 #2
Address F06=2
Address F06=2
AD-4405 #2
Address F06=2
Address F06=2
AD-4405 #1
Address F06=1
Address F06=1
AD-4405 #1
Address F06=1
Address F06=1
Host computer
Host computer
Connect a terminator to the
end connection.
Internal termination resister
is effective when the TRM
terminal is connected to the
RDB terminal.
end connection.
Internal termination resister
is effective when the TRM
terminal is connected to the
RDB terminal.