Specifications

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 Installation is similar to the OP-03. See “2-1. Installation”.
 Set the function parameters F04, F05, F06, F18, F19 and F20 according your
application.
 The function setting F19-1 must be set for RS-422 and F19-2 must be RS-485. To
connect more than one scale with a computer, set a different address to each scale
by F18-##.
3-2. OP-04 Specifications
RS-422/485 Specifications
Transmission form Asynchronous, bi-directional, half-duplex
Data format Baud rate: 2400, 4800, 9600 bps
Data: 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
LSB
0 1 2 3 4 5
MSB
6
Circuit diagram
Solid sate relay
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)
1 Relay output HI
2 Relay output LO
3 Relay output OK
4 Relay common COM
5 Shield SHLD
6 Frame ground FG
FS-
i
inside
Sto
p
bit
A-B
1 (-2V~-5V)
0 (2V~15V)
Start bit
Data bit
Parity bit