Note the following:
n
With hardware handshake: Use a straight-through and not a null modem
cable for connecting a thermostat to the PC. The RS 232
‑
interface can
be connected directly with the PC using a straight-through cable.
n
Without hardware handshake: Set the corresponding operating mode on
the PC. Use shielded connection cables. Connect shield to connector
case. The cables must be galvanically isolated from the rest of the elec-
tronics. Do not connect unassigned pins.
n
The RS 232
‑
interface can be easily checked on a connected PC with
the Microsoft Windows operating system.
For Windows
®
3.11 using the "Terminal" program.
For Windows
®
95/98/NT/XP using the "HyperTerminal" program.
"HyperTerminal" is no longer part of the operating system for the Windows
Vista, Windows 7 and Windows 8 operating systems.
n
The RS 232
‑
interface can be addressed using the LAUDA Win-
therm Plus control and programming software (catalogue number
LDSM2002).
n
Freeware terminal programs can be found on the World Wide Web.
These programs provide similar functions to those of "HyperTerminal"
(for example PuTTY). Search request "serial port terminal program".
4.4 Alarm output 12N
Function
Description
Alarm output
--
Alarm and standby
for on-site return flow protection
n
maximum 30 V DC; 0.2 A
Fig. 11: Flange connector (front) in idle state
1 Normally open contact
2 Centre
3 Normally closed contact
Front view of the flange connector or of the coupling socket on the solder
side
Available functions
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Summary of Contents for MC 250
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