A&D Weighing AD-1690 - Manual (Page 23)

21
11. RS-232C INTERFACE
(1) Interface specification
The Leak Tester can output the data to an AD-8121B (compact printer: sold
separately), AD-1688 (weighing data logger) or a personal computer. etc.
This model is a DCE device. Connect the Leak Tester to a personal computer (DTE),
using a straight through cable.
Transmission system : EIA RS-232C (Connector type: D-Sub9 pin (male))
Transmission form
: Asynchronous, bi-directional, half duplex
Data format : Baud rate : 2400 bps
Data bits : 7 bits
Parity : Even(Data bits 7 bits)
Stop bit : 1 bit
Code : ASCII
Example: Connected to an AD-8121B
AD-8121B AD-1690
* Set the mode of the AD8121B to “MODE 3”.
The AD8121B can print the example of “(2) Output format” (next page).
Pin connections
Pin No.
Signal
name
Direction Description
1
2
3
4
5
6
7
8
9 －
TXD
RXD
－
SG
DSR
RTS
CTS
－
－
Output
Input
－
－
Output
Input
Output
－
Internally used
Transmit data
Receive data
Internally used
Signal ground
Data set ready
Request to send
Permission to send
Internally used
The names are the DTE side other than the TXD and RXD.
9 8 7 6
5 4 3 2 1
Screw: inch #4-40