3
This manual applies to the following hardware versions:
STDC Version 1
3 temperature sensor inputs
1 relay output 230 AC (on/off)
STDC Version 2
3 temperature sensor inputs
1 electronic relay output 230 AC (for speed control of standard pumps)
STDC Version 3
3 temperature sensor inputs
1 relay output 230 AC (on/off)
1 PWM/0-10V output (for speed control of high effi ciency pumps)
STDC Version 4
3 temperature sensor inputs
1 electronic relay output 230 AC (for speed control of standard pumps)
1 PWM/0-10V output (for speed control of high effi ciency pumps)
When you are unsure which version you have, check the type label on the side
of the controller.
If the version is not readable here, open the controller’s “Service values” menu.
The version is shown in the fi rst line of the service values.
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