STIEBEL ELTRON SOM 10 - Manual (Page 74)

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74
16.3 Outputs
In this menu, the signal type and the minimum speed
can be adjusted for each individual relay of the cont-
roller and the external modules.
Î In order to make adjustments for a relay, select the
corresponding menu item by pressing button
5 .
For each relay, the signal type and the minimum pump
speed can be adjusted.
The signal type determines the way speed control of
a connected pump is effected. The following modes
are available:
Adapter = speed control signal via a VBus
® / PWM
interface adapter
0-10 V = speed control via a 0-10 V signal
PWM = speed control via a PWM signal
Standard = pulse packet speed control
(factory setting)
With the signal types Adapter, 0-10 V and PWM, the
relay itself is not involved in speed control. A seperate
connection for the corresponding signal will have to
be made (see figure).
In order to reduce the number of switching processes
for high-efficiency pumps, the controller is equipped
with a relay overrun function that automatically co-
mes into effect when the speed control signal is not
issued by the relay itself. The corresponding relay will
then remain switched on for an hour after the switch-
off conditions are fulfilled.
R1
S2
S1
Example of the electrical connection of a high-efficiency pump
Adjustment channel Description Adjustment range / selection Factory setting
R1 ... R13 Relay output selection - -
Signal Signal type Adapter, 0-10 V, PWM, Standard Standard
Output PWM output selection 17,18,19,20 -
Profile PWM characteristic curve A,B,C,D,E,F A
Min speed Minimum speed 30 ... 100 % 30 %
In- / Outputs / Outputs
If PWM is selected, the channels Output and
Profile appear. In the Output channel, one of the 4
PWM outputs can be selected. In the Profile channel,
a PWM characteristic curve corresponding with the
pump in use can be selected (see page 75).