Walther 979429.02 Operating Manual - page 8
Rev. 1.2
Operating Manual 979429.02
Page 8 of 13
Walther Systemtechnik GmbH
– D 76726 Germersheim
Telefon: +49 (0)7274-7022-0 Telefax: +49 (0)7274-7022-91
http://www.walther-2000.de
– info@walther-2000.de
4.3 Interfaces
General Information:
Model 979429.02 is intended for resistance sensors Pt100; furthermore for thermo elements of type T, R, J,
B, S, K, E and Wre-Wre25. For use with platinum sensors (PT100) the degree display is within 1/10 degree
of accuracy. For use with thermo elements the measuring display has an accuracy of the measuring
temperatures in the four-digit range (max. 2300 degrees).
The 979429.02 possesses a reduction switch necessary for the connection of PT100 sensors in three wire
connection for compensating the cable resistance. Cable lengths of up to 50 meters measuring lead can be
realized without intermediate transmitter
(min. 3x0.22mm²)
.
Inlets:
Control Voltage:
The supply voltage for the controller is 230V AC 50Hz (see also connection diagram).
4.4 Wiring Diagram
Warning
Working with electricity can be very dangerous! Imitating the illustrated examples can
cause accidents and must be performed by qualified experts only!
Check whether the voltage information on the control corresponds with these
instructions!
(No warranty with wrong connection!)
Hysteresis:
Temperature value or time value necessary only in the ON/OFF operating mode, which
passes by between the automatic switch-off when the set value is reached and the
automatic restart. This value can basically be indicated in degrees C or as time value. The
hysteresis is necessary in order to avoid the so-called
“flickering” of the relay, when the
temperature value reaches the set value.