AIAS RC Techsheet IMO

AIAS Room controller - installation and operation instruction | 19 / 26
Actuators
Regio can be used with four types of actuators:
• Analogue 0...10 V actuators
• Thermal actuators
• 3-point actuators (Increase/Decrease actuators)
• On/Off spring return actuators
On units without display, it is possible to select if thermal or
analogue actuators will be used via the DIP switches. For other
actuators and Regio models, the actuator type is set via Regio
tool© or, for controllers with a display, in the parameter menu.
Analogue actuators
The following output signals can be set for analogue actuators:
• 0...10 V (FS)
• 2...10 V
• 10...2 V
• 10...0 V
Thermal actuators
When thermal actuator control has been selected, it is controlled
digitally with time proportional pulses via output UO1 and UO2.
By pulsing, the opening degree of the actuator (and its valve) is
varied. The period time (in seconds) is the sum of the on and off
output times on the output. The period time is FS=60s. The con-
troller varies the on and off output times proportionally depen-
ding on the output signal demand to the actuator.
3-point actuators
For 3-point actuators (increase/decrease actuators, -T-models),
two digital outputs are used for controlling one actuator, one
output to open the actuator and one to close it. You can congu-
re the run time (in seconds) for the different actuators (FS=120
s). The program calculates the position of the actuator (0...100
%) and sends an increase or decrease signal when the controller
output signal deviates more than the set neutral zone (FS=2 %)
from the calculated position.
On/Off spring return actuators
When On/Off spring return actuator has been selected, the func-
tionality is similar to a thermostat function. This will be relevant
only in control modes Heating, Heating/Cooling via change-over,
Heating/Cooling and Cooling. Selecting this function will not be
possible if any other control mode has been selected.
A hysteresis is used when the outputs are On or Off.
In heating mode, the temperature will be permitted to fall below
the setpoint, minus the hysteresis, before the actuator opens.
The actuator will then remain open until the temperature rises
above the setpoint.
Actuator exercise
All actuators are exercised. The exercise takes place at set inter-
vals in hours (FS=23 hours interval). An opening signal is sent
to the actuator for as long as the congured run time. Then a
closing signal corresponding to the length of the run time is sent
and the exercise is nished.
On units with a display, the exercise can be inactivated by setting
parameters 36 and 37 to zero (0).