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RS-232C
Transmission system
Transmission form
Data format
Circuit
SG
AD-8922A interior
5
9
To a weighing instrument
Connection to the weighing instrument
D-Sub 9-pin (BALANCE/SCALE)
Pin
Signal
Direction
No.
name
⎯
1
2
RXD
3
TXD
Output
⎯
4
5
SG
6
DSR
7
RTS
Output
⎯
8
⎯
9
(AD-8922A is a DTE. Connects to a DCE
such as a weighing instrument using a
straight through cable.)
:
EIA RS-232C
:
Asynchronous, bi-directional, half duplex
:
Baud rate
Data bits
Parity bit
Stop bits
Code
Terminator
HI
OK
LO
4
3
2
1
Inch screw thread
8
7
6
(#4-40UNC)
Description
⎯
N.C.
Input
Receive data
Transmit data
⎯
N.C.
⎯
Signal ground
Input
Data set ready
Request to send
⎯
N.C.
⎯
N.C.
:
600, 1200, 2400, 4800, 9600, 19200 bps
:
7 bits or 8 bits
:
EVEN, ODD
NONE
(Data bits 8 bits)
:
1 bit or 2 bits
:
ASCII
:
<CR> or <CR><LF>
COM
HI
OK
SG
2
4
5
LO
1
8
7
6
To an external device such as
a personal computer or a printer
Connection to an external device
DIN 8-pin (COMP.OUT)
Pin
Signal
No.
name
1
HI
HI contact-output
2
COM
COM contact-output
3
TXD
Transmit data (RS-232C output)
4
LO
LO contact-output
5
SG
Signal ground
6
OK
OK contact-output
7
DSR
Data set ready (RS-232C output)
8
RXD
Receive data (RS-232C output)
26
(Data bits 7 bits)
DSR
AD-8922 A interior
3
Description
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