MATRIX Control Panel OP71 Operating MATRIX control panel OP71
PR-2009-0021-GB • Subject to modifications • R5-04/2016 77
The specifications of the sensor values are given in the technical documentation on the
air handling unit or sensor, or on the sensor itself.
Example range start/
range end:
The supply-air fan speed and supply-air volume can be changed using an external 0-
10V signal. The following settings are selected:
– Use: Speed setpoint over 0-10V [speed setpoint]
– Range start: 30%
– Range end 150%
Since the input type for the use "Speed reference value" is automatically set to 0-10V,
it does not need to be specified.
On the one hand, this setting results in the minimum air volume (0% of maximum fan
speed) conveyed at input signal as high as 30V. On the other hand, with the configured
range end of 150%,
the maximum fan speed is already achieved with an input signal of 5.83°V = (10°V /
(range end [%] - range start [%]) ) * (100°% range start [%]). This can be used in
combination with a CO2 sensor in order to operate the air handling unit at full capacity
starting from a certain CO2 indoor concentration and using the output sensor signal
below 10 V.
Sensor inputs ➜ Filter constant
If one of the following points is selected in the "Use" submenu
– Measuring duct pressure
– Measuring volume flow
– Volume flow measuring via pressure sensor
the needed filter time constant can be selected for the PT1 filter of the sensor input in
the "filter constant" submenu. The submenu "filter constant" is not displayed for other
uses.
Value
range:
Speed setpoint range 0-10V 0 to 200%
Adjustable steps: 1%
Factory setting: 0 to 0%
Measuring duct pressure 0 to 5.000 Pa
adjustable steps: 5 Pa
Factory setting: 0 to 0 Pa
Measuring volume flow 0 to 65,000 m3/h
adjustable steps: 10 m
3
/h
Factory setting: 0 to 0 m
3
/h
Volume flow measurement
with pressure sensor
0 to 5.000 Pa
adjustable steps: 5 Pa
Factory setting: 0 to 0 Pa
NOTICE!
When measuring volume flow with a pressure sensor, unlike direct measuring of
volume flow, the volume flow is calculated using the fan differential pressure. For this
purpose the differential pressure measured by the sensor input is converted into
volume flow by using the so-called K-factor (refer to sensor inputs ➜ K-factor)
Value range: 10 to 150 seconds
Adjustable steps: 0.1 seconds
Factory setting: 25 seconds
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