Specifications

Page 52 MultiWeigher 3000 Operations Manual
8.1.2. Serial Interface RS485/RS422 – A&D 4404
 The RS-422/485 interface can use commands to control the indicator. The
interface can read weighing data or parameters or store parameters to the
indicator.
 The interface can connect a maximum of 32 units and a personal computer.
 The unit can be specified by an address appended to the command.
 RS-485 can use 2-wire or 4-wire.
Specifications
Transmission system EIA RS-422 / 485,
Asynchronous, bi-directional, half-duplex
Data length 7 bits or 8 bits
Start bit 1 bit
Parity bit Odd, Even, not used
Stop bits 1 bit, 2 bits
Baud rate 600 bps, 1200 bps, 2400 bps, 4800 bps, 9600 bps, 19200
Line RS-422: 4 wires
RS-485: 2 wires or 4 wires
Connection Max. 32 units
Character code ASCII code
Terminator CR, CR LF
Connection
SD
A
Terminator switch
SDB
RD
A
RDB
SG
FG
Fix screw
INSIDE INDICATOR
DE/RE
422/485
FG
TERMINATOR
100
Ω
SD
RD
3 RD
A
4 RDB
5 SG
1 SD
A
2 SDB
6 FG