STIEBEL ELTRON SOM 8 PLUS - Outputs

74
16.3 Outputs
In this menu, the signal type and the minimum
speed can be adjusted for each individual relay of
the controller and the external modules.
Î In order to make adjustments for a relay, select
the corresponding menu item by pressing but-
ton
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 eected. 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 sepera-
te connection for the corresponding signal will have
to be made (see gure).
In order to reduce the number of switching pro-
cesses for high-eciency pumps, the controller is
equipped with a relay overrun function that auto-
matically comes into eect when the speed control
signal is not issued by the relay itself. The correspon-
ding relay will then remain switched on for an hour
after the switch-o conditions are fullled.
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 -
Prole 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).
295931-36390-8667 SOM 8 plus_en.indb 74 20.10.2011 13:14:59