A&D AD-4405 User Manual
Page
66
AD-4405 Weighing Indicator
17.
17.
17.
17. RS
RS
RS
RS-
-
-
-422/RS
422/RS
422/RS
422/RS-
-
-
-485, Relay Output(OP
485, Relay Output(OP
485, Relay Output(OP
485, 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 the RS-422/RS-485 interface are common to RS-232C except the
signal system.
The relays output the result of comparison.
Solid-state-relay
Maximum voltage
DC50V
Maximum current
DC100mA
Maximum resistance
8
Ω
Pin
connections
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
5
TRM
-
Terminator resistance (100
Ω
)
RS-422
RS-485
RS-485
6 SG -
Signal
ground
7 HI
Output
Relay
output
HI
8 OK
Output
Relay
output
OK
9 LO
Output
Relay
output
LO
Relay
output
output
10 COM
-
Relay
output
common
Adaptable connector
TM-BLA10 (an accessory)
An AC adapter (an accessory) must be connected to the option board when using the
RS-422 or RS-485 interface. If using relay output only, the AC adapter is not required.
Circuit
Circuit
Circuit
Circuit
17. RS-422/RS-485, Relay Output(OP-03)
Relay Output Terminals
RS-422 Output
RS-485 Output
RS-485 Output
RS-422 Input
RS-485 Input
RS-485 Input
RS-422/RS-485 Terminals
DC 7V - 10V
AC adapter Jack
(The AC adapter is an accessory of OP-03)
+
-
Note: Please confirm that the AC adapter type is correct
for your local voltage and receptacle type