A&D AD-8922A Manual de instrucciones descargar pdf (Pagina 17)

７ RS-232C SERIAL INTERFACE

RS-232C

Transmission system : EIA RS-232C

Transmission form : Asynchronous, bi-directional, half duplex

Data format : Baud rate : 600, 1200, 2400, 4800, 9600, 19200 bps

Data bits : 7 bits or 8 bits

Parity bit : EVEN, ODD (Data bits 7 bits)

NONE (Data bits 8 bits)

Stop bits : 1 bit or 2 bits

Code : ASCII

Terminator : <CR> or <CR><LF>

Circuit

Connection to the weighing instrument Connection to an external device

D-Sub 9-pin DIN 8-pin

No.

Signal

name

Direction Description

No.

Signal

name

Direction Description

1 (Vs) ⎯ Used internally 1 FG ⎯ Frame ground

2 RXD Input Receive data 2 RXD Input Receive data

3 TXD Output Transmit data 3 TXD Output Transmit data

4 ⎯ ⎯ N.C. 4 RTS Input Request to send

5 SG ⎯ Signal ground 5 SG ⎯ Signal ground

6 DSR Input Data set ready 6 CTS Output Clear to send

7 RTS Output Request to send 7 DSR Output Data set ready

8 CTS Input Clear to send 8 ⎯ ⎯ N.C.

9 (Va) ⎯ Used internally

(The signal names except TXD and RXD

apply to the DTE such as a personal

computer.)

(AD-8922A is a DTE. Connects to a DCE

such as a weighing instrument using a

straight through cable.)

When making the cable yourself, do no

connect to the internally used terminals.

9876

CTS

RTS

DSR

TXD

RXD

AD-8922A interior

To a weighing instrument

To an external device such as

a personal computer or a printer

54321

TXD

RXD

AD-8922A interior

Inch screw thread

(#4-40UNC)

(Va)

(Vs)

1 2 ... 12 13 14 15 16 17 18 19 20 21 22 ... 41 42

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A&D AD-8922A Manual de instrucciones Pagina 17

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