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RS232 Serial Interface
The TU-20D and TU-20HT may send data logging information to a compatible computer by connecting the unit and
the PC via an RS232 cable and installing the TechneWorks PC Software (available to download free of charge from
http://www.techne.com/Software.asp).
The RS232 cable must be fitted to both the unit and the PC before either unit is powered up, otherwise data
integrity cannot be guaranteed. Once the cable is fitted, it does not matter which unit is powered up first.
The following tables indicate the cable specifications for a 9-way PC serial port:
Thermoregulator
PC
9-way female D type
9-way female D
type
Pin
signal
pin
Case
F.GND
Case
3
TxD
3
2
RxD
2
7
RTS
7
8
CTS
8
6
DSR
6
1
CD
1
4
DTR
4
5
S.GND
5
For further information, please refer to the TechneWorks PC Software Instruction Manual.
RS232 Connection
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