A&D FS-03i, Instruction Manual

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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

Stop bit 

   A-B 

1 (-2V~-5V) 

0 (2V~15V) 

Start bit

Data bit

Parity bit