A&D Weighing AD-4407 User Manual
Page 57
AD-4407 Weighing Indicator
Page
55
14.
14.
14.
14. RS
RS
RS
RS-
-
-
-422/RS
422/RS
422/RS
422/RS-
-
-
-48
48
48
485, Relay Output(OP
5, Relay Output(OP
5, Relay Output(OP
5, Relay Output(OP-
-
-
-03)
03)
03)
03)
Replacing the RS-232C interface with this option, the RS-422/RS-485 interface can
connect up to 32 indicators and control them from a computer or a PLC.
The functions of RS-422/RS-485 interface are common to RS-232C except for the
signal system.
The relays output the result of comparison.
Solid-state-relay
Maximum voltage
DC50V
Maximum current
DC100mA
Maximum resistance 8
Pin connections and Circuits
Pin connections and Circuits
Pin connections and Circuits
Pin connections and Circuits
Function Pin No. Signal name
Direction
Description
1
SDA
Output
Transmission A terminal
2
SDB
Output
Transmission B terminal
3
RDA
Input
Receive A terminal
4
RDB
Input
Receive B terminal
RS-422
RS-485
5 TRM
-
Terminator
resistance(100 )
6
HI
Output
Relay output HI
7
OK
Output
Relay output OK
8
LO
Output
Relay output LO
Relay
output
9
COM
-
Relay output common
Adaptable connector
TM-BLA9 (of accessory)
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 (SW1) on the
OP-03 board.
14. RS-422/485, Relay Output (OP-03)
*+ 1- .1 %1/
Relay Output Terminals
RS-422 Output
RS-485 Output
RS-422 Input
RS-485 Input
5 5&$ 4 4&$ 64/
RS-422/RS-485 Terminals
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