Bedienungsanleitung Steuerung S4_2006_09_25-neu.doc
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© wodtke GmbH Tübingen. All rights reserved. Subject to change without notice.
Month of issue xx/2007
Art. No. 950 281
5.12.4
Modulation heating programme via external controller (continuous
controller)
= display shows HE for continuous output modulation via external controller
= display shows flashing dot for feed screw operation
= display shows thermal output in kW
The Modulation input permits infinite adjustment of thermal output. For this purpose an external
controller (such as a heating controller) with a signal output of 0-10 V or 4-20 mA must be
used.
The signal voltage or current corresponds to the thermal output
shown on the display. The appliance will deliver thermal output as
required by the external controller.
In the case of external modulation the external controller will usually have two outputs, of which
one switches the device “ON” and “OFF” via the “ON/OFF” input, while the other controls the
stove’s thermal output via the “MODULATION” input.
Note:
Only use potential-free controllers for the “ON/OFF” input.
The “MODULATION” input requires a controller with a signal output of 0-10 V or 4-20 mA.
It first has to be activated and adapted to the controller’s signalling mode (0-10V voltage
or 4-20 mA current) (see assembly instructions). A 0V or 4 mA signal at the “MODULATION”
input means minimum thermal output, while a 10V or 20 mA signal means maximum thermal
output.
With the +/- keys you can change the previously set output level in 0.5 kW steps at any time.
However, manual changes in thermal output only become effective when the “MODULATION”
input has been deactivated again.
Display indicates external modulation (continuous)
H
E
4.5
