
Seedburo 1200D
®
Digital Moisture Tester Manual
10
3.4 SERIAL COMMUNICATION
An input/output Serial Port (Standard 9DB Pin RS 232) is located on the
back panel of the unit. It can be used to connect the
Seedburo Model
1200D
to a RS232 compatible printer or to the serial port of a computer.
The electrical signal assignment for the RS-232 9 pin connector is here
given.
Pin
Label
Signal
1
DCD
+ RLSD
2
TXD
Transmit Data
3
RXD
Receive Data
4
DTR
Data Terminal Ready
5
GND
Signal Ground
6
DSR
Data Set Ready
7
RTS
Request To Send
8
CTS
Clear To Send
9
RI
Ring Indicate
The electrical wiring diagram for the 9 pin to a 25 or 9 pin connector
is here given.
DB9
DB25 or DB9
4 - DTR
20
4
6 - DSR
6
6
7 - RTS
4
7
8 - CTS
5
8
1 - DCD
8
1
2 - TXD
3
2
3 - RXD
2
3
5 - GND
7
5
9 - RI
22
9
The
1200D
can be configured for 300, 600, 1200, 2400 or 9600 baud
serial communications with 1 stop bit, 8 data bits and no parity.