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8.3
RS 232/485 Serial interface
RS 232/485 interface module (catalogue no. LRZ 913) with 9-pole SUB-D socket. Electrically isolated by opto-
coupler. With the LAUDA instruction set essentially compatible to the ECO, Ecoline, Integral XT and Integral T Se-
ries. The RS 232 interface can be connected directly to the PC with a 1:1 through-contact cable (catalogue no. EKS
037).
8.3.1 Connecting cables and interface test RS 232
Signal
R x D
T x D
DTR
Signal Ground
DSR
RTS
CTS
with hardware handshake: For connecting a thermostat to the PC use 1:1 cable and not a null-modem cable!
without hardware handshake: the computer / PC must be set to the operating mode "without hardware handshake".
When a PC is connected up the RS 232 interface can easily be tested using the Microsoft Windows
operating system.
On Windows
®
3.11 with the "Terminal" program, on Windows
"HyperTerminal" is no longer included in later Windows operating systems.
It is possible to communicate with the RS 232-interface using the LAUDA control and application software,
Wintherm Plus (catalog number LDSM2002).
Terminal programs are available on the Internet as freeware. These programs offer features similar to "Hyper-
Terminal" (for example PuTTY). Search query "serial port terminal program".
02/2022
Computer
9-pin sub-D-socket
2
2
3
3
4
5
5
6
7
8
Use screened connecting cable.
Connect screen to connector case.
The connections are galvanically isolated from the rest of the electronics.
Any pins not in use must not be connected!
Proline heating thermostat
25-pin sub-D-socket
3
3
2
2
20
7
7
6
4
5
®
95/ 98/ NT/ XP with the "Hyper Terminal" program.
Thermostat
9-pin sub-D-socket
2
2
3
3
4
5
5
6
7
8
Signal
T x D
R x D
DSR
Signal Ground
DTR
CTS
RTS
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