A&D Digital Platform Scales HW-10KGV - Manual (Page 59)

HW-G Instruction Manual Page 57
HW-G OZIM v1a
17.2 RS-422 / RS-485 / Relay output (OP-04)
Replacing RS-232C interface with this option, the RS-422/ RS-485 interface can connect
up to 16 scales and control them from a computer.
The RS-422/ RS-485 interface has the following two modes.
Stream mode Outputs data countinuouslly.
Command mode Controls the scale using commands from a computer.
It is necessary to set the parameters of the “Baud rate (
f4
)”, “
Output mode (
f5
)”, “ Format (
f15
)” in the function table in advance.
Transmission systemEIA RS-422/ RS-485
Transmission
Asynchronous, bi-directional, half-duplex
Data format Baud rate: 2400, 4800, 9600 bps
Data:
7 bits
Parity: 1 bit, Even
Start bit 1 bit
Stop bit 1 bit
Code ASCII
Terminator CR LF (CR: 0D[H], LF: 0A[H])
Address 01 ~ 99 Address parameter (
f10
) of function table.
Relay Solid-state-relay
Maximum voltage
DC50V
Maximum current DC100mA
Maximum resistance 8
Ω
Mating connector TM:BLA9 (of accessory pack)
Pin connections
Pin No. Signal name Direction Description
1 SDA Output RS-422 transmission A terminal
2 SDB Output RS-422 transmission B terminal
3 RDA Input RS-422 receive A terminal
Input / Output RS-485 transmission/ receive A
terminal
4 RDB Input RS-422 receive B terminal
Input / Output RS-485 transmission/ receive B
terminal
5 TRM - 120
Ω
terminator
6 HI Output Relay output of HI
7 OK Output Relay output of OK
8 LO Output Relay output of LO
9 COM - Relay common terminal