domat UC220
03/2017 Subject to technical changes.
1
UC220
Communicative heating and
cooling controller, 0..10 V output
Summary
UC220 is a communicative room heating controller with two binary inputs and two
0...10 V DC outputs for control of a radiator or electrical heater and a cooling valve
(cooling panels, chilled ceilings). It can work autonomously, or in connection to a
primary controller (MiniPLC or SoftPLC), or building management system (RcWare
Vision or any SCADA).
Application
Systems with radiators, electric heaters, or floor heating, and chilled
ceilings or panels – control and measuring of room temperature
monitoring and communication of room temperatures
Function
The controller reads actual room temperature, setpoint shift by a knob, and set
operation status which is set by short push of the knob. The room temperature is
measured in the range of -20 to +70 °C. Measured and set values are processed in a PI
algorithm, which is brought to sequence block and two 0..10 V DC outputs. All values
are displayed on a large LCD display.
The functionality and control parameters, i.e. P and I constants, and hysteresis, can be
set with ModComTool, the configuration software, which is free to download at
http://domat-int.com/en/downloads/software
The controller contains real time clock with a weekly scheduler (6 events per day). It
changes between three operation modes: Day, Night, and Off. A short push in the Night
mode switches to Party mode – Comfort extension by 2 hours.
The digital inputs read signals from a window contact and presence sensors. They can
be used optionally.
The communication bus is Modbus RTU over RS485, therefore the controllers are easily
to integrate into any SCADA or BMS system. Protocol description is available in a
separate document.
