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Page 58 HV-WP/HW-WP Series
17.3. OP-04, Options
17.3.
17.3.17.3.
17.3. RS-422/ RS-485 / Relay output (OP-04)
RS-422/ RS-485 / Relay output (OP-04)RS-422/ RS-485 / Relay output (OP-04)
RS-422/ RS-485 / Relay output (OP-04)
Replacing the 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.
Steam mode Outputs data countinuouslly.
Command mode Controls the scale using commad from a computer.
Set the parameters for the "Baud rate ( f4 )", " Output mode ( f5 )" and " Format
( f15 )", in the function table, in advance.
Transmission system EIA 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: 0Dh, LF: 0Ah)
Address 01 ~ 99 Address parameter ( f11 ) of the function table.
Relay Solid-state-relay
Maximum voltage DC50V
Maximum current DC100mA
Maximum resistance 8 Ω
Adaptable connector TM:BLA9 (of accessory)
Pin connections
Pin No. Signal name Direction Description
A
1 SDA Output RS-422/485 transmission A terminal
A
2 SDB Output RS-422/485 transmission B terminal
A
3 RDA Input RS-422/485 receive A terminal
A
4 RDB Input RS-422/485 receive B terminal
A
5TRM -
120Ω terminator
A
6 HI Output Relay output of HI
A
7 OK Output Relay output of OK
A
8 LO Output Relay output of LO
A
9 COM - Relay common terminal
A