A&D Super Wash Down Scales SW-150KL - Manual (Page 37)

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‰ The installation procedure is the same as for OP-03. Refer to “13.2.1. Installing OP-03”.
‰ Set the function settings “ bp5 ”, “ btpr ”, “ prt ”, “ 5if ”, “ adr ” and “ aCk ” as
necessary.
‰ Before using OP-04, the function setting “
5if
” must be set to specify whether RS-
422 or RS-485 is used.
To connect more than one scale to a computer, set a different address to each
scale using the function setting “
adr ”.
13.3.2. OP-04 Specifications
RS-422/485 Specifications
Transmission system EIA RS-422 / 485
Transmission form
Asynchronous, bi-directional, half-duplex
Data format Baud rate: 2400, 4800, 9600 bps
Data bits: 7 bits + parity 1bit (EVEN / ODD)
or 8 bits (non parity)
Start bit: 1 bit
Stop bit: 1 bit
Code: ASCII
Terminator: C
R
L
F
(C
R
:0Dh, L
F
:0Ah)
LSB
0 1 2 3 4 5
MSB
6
Circuit diagram
Stop bit
A-B
1 (-2V~-5V)
0 (2V~15V)
Start bit Data bits Parity bit
1 SDA (RS-422 Out)
2 SDB (RS-422 Out)
3 RDA (RS-422 In / RS-485 In-Out)
4 RDB (RS-422 In / RS-485 In-Out)
5 TRM (Termination)
6 SG (Signal ground)
7 SHLD (Shield)
100Ω
1 SDA (RS-422 Out)
2 SDB (RS-422 Out)
3 RDA (RS-422 In / RS-485 In-Out)
4 RDB (RS-422 In / RS-485 In-Out)
5 TRM (Termination)
6 SG (Signal ground)
7 SHLD (Shield)