Product specifications

Page 76 AD-4402
8.2.
8.2.8.2.
8.2. Built
BuiltBuilt
Built-
--
-in RS
in RSin RS
in RS-
--
-485 Interface
485 Interface485 Interface
485 Interface
The RS-485 interface can use commands to control the indicator. The interface can
read weighing data or parameters and store parameters in the indicator.
The interface can connect a maximum of 32 units and a personal computer using a
communication cable.
Each unit is specified by an address appended to the command.
Transmission system EIA RS-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
bps, 38400 bps
Line 2 wires (2-balanced wires)
Connection Max. 32 units
Character code ASCII code
Terminator CR, CR LF
The way of Use and Notes
When useing terminator, connect it between the SDA and SDB terminals using the
accessory resistor.
If there is no signal ground at the host computer, it is not necessry to use the SG
terminal.
If the shield cable is used, connect the FG teminal to the shield line.
When connecting to RS-232C, Use AD-7491 or a converter of RS-232C/ RS-485 on a
market.
Use a multi-drop connection for command mode.
Do not use a multi-drop connection in stream mode or jet stream mode.
8.2.1.
8.2.1.8.2.1.
8.2.1. Connection
ConnectionConnection
Connection
Terminals Interface Circuit
SDA
RS-485
A
B
SG
C.LOOP
FG
SDB
SG
Shield
A
D-4402 Inside
A
B
SG
RE/DE