domat UX0 Series User manual

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UX0…
Communicative room units
with sunblind control
Summary
The UX... room unit range is a family of universal communicative human-machine
interface for control of HVAC units and plants, IRC controllers, and blinds. The
units communicate over Modbus RTU / RS485 and they can be used as open
system components with majority of building control system and controllers.
Application
▪rooms with heating / air conditioning and sunblinds.
▪systems with fancoils, convectors, floor and radiator heating, AHUs, air
conditioning units.
▪control of boilers, DHW, heating circuits, building controls in general
▪monitoring of room temperature and humidity
▪with a SCADA system: temperature, humidity and status recording,
remote control.
Function
The units acquire temperature and optionally relative humidity in room, temperature
correction (left / right button), sunblind correction (up / down button) and required
operation status (central button or in the menu). In the configurable menu following
values can be set and displayed:
–temperature, actual temperature correction
–humidity (actual value only at room units containing the humidity sensor)
–time (only display at room units with RTC)
–basic setpoint - day
–basic setpoint - night
–outside temperature for heating enable
–DHW temperature
–heating curve type (1...4)
–operation mode (Residential with Day, Night, Time schedule, Off, or Hotel /
Office with Comfort, Standby, Party, Off)
–fan stage (Auto, Off, St.1, St. 2, St. 3)

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–A/C mode (Auto, Heating, Cooling, Off, Fan only)
–weekly scheduler: 7 days, up to 6 events per day
–another 5 variables (air quality, fan speed etc.) –each has a profile where max.
and min. values, step, number of decimals, and symbol set are defined.
It is also possible to set / reset any of the LCD symbols on the display over Modbus.
•The multifunction button set has three basic functions:
•instant edit (left / right button) –settings of one predefined analogue value,
usually room temperature correction
•sunblind up / down (up / down button) –control of two digital outputs with
sunblind control functionality (slat angle, up / down, move to end positions)
•quick edit (short push of the central button) –change of predefined state, e.g.
Presence (Comfort / Standby / Off), Air condition (Auto / Heating / Cooling /
Fan only / Off) etc.
•long push of the central button –jump to menu where values are listed by left
/ right buttons, short push selects the value to be edited, and the value is
changed by left / right buttons followed by short push for confirmation.
After definable inactivity time, the display goes back to its basic state with rolling
display of selected values (e.g. actual temperature and humidity).
The unit Modbus address and functionality is defined over the RS485 interface with
service software ModComTool which is free for download at http://domat-
int.com/en/downloads/software. To interface the room unit to the computer use the
USB/485 converter M080, RS232/RS485 converter R012, or any suitable RS485
converter.
____________________________________________________________________
Technical data
Power supply
24 V AC +/- 10%
Consumption
1,5 W
Temperature measuring range
-20 ÷ 70 °C, accuracy according to DIN IEC 751,
Class B
Humidity measuring range (selected types only,
see table below)
10 ÷ 90 %rH (30-70% +/- 3.5%, 10-90 +/- 4.5%)
Protection
IP20
Inputs
1x for dry contacts, 24 V AC, 5 mA
Outputs
3x solid state relay, zero switching, AC load, 24 V
AC, maximum switched current 0,4 A
Use ME200 relay module for power switching
of the sunblind motors.
Communication
RS485 - Modbus RTU, slave, selectable speed
1200 ... 115200 bps, N,8,1
The interface is optically separated.
Display
LCD 60 x 60 mm, symbol set see above
Terminals
screw terminals for wires 0,14 –1,5 mm2

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Cover
ABS, RAL9010, other colours
Weight
0,13 kg
Dimensions
see below
DIP switches
Back of the PCB
BUS END: if ON, the bus is terminated (if
last device on the line)
USR: not used, reserved for future
applications
INIT: sets the controller into default
state and sets bus address to 1, baud rate
to 9600. To init, proceed as follows:
- connect the device over RS485 to a PC
with domat.exe config tool
- set INIT to ON
- apply power (use only the connector
without bottom)
- find the controller in the tool (Scan)
- set INIT to OFF
- in the ModComTool tool, open the
controller window
- click the Init button in the tool
- remove and apply power.
Terminals
1
2
3
4
5
6
7
8
9
UX0...: 1 binary input, 3 binary SSR
outputs
1: DI1 input 1
2: DO1 output 1, 24 V AC against G0
3: DO2 output 2, 24 V AC against G0 –
sunblind up
4: DO3 output 3, 24 V AC against G0 –
sunblind down
5: G0 power, outputs, input –common
point
6: G0 power, outputs, input –common
point
7: G power
8: K- communication RS485 -
9: K+ communication RS485 +

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Type table
Type
LCD
5 buttons
DI
DO
t
rH
RTC
UX011
✓
✓
1
3
✓
UX015
✓
✓
1
3
✓
✓
UX041
✓
✓
1
3
✓
✓
UX045
✓
✓
1
3
✓
✓
✓
RTC... real time clock
Process control algorithms (evaluation of the temperature sensor and digital input DI1,
activating of the DO1 output by increased / decreased temperature, humidity etc.) and
central sunblind override must be implemented in the master controller.
Dimensions
All dimensions in mm.
Installation
Units are intended for operating in a normal and chemically non-aggressive
environment. They do not need any servicing or maintenance. Install them in a vertical
position at places where they can be operated easily and measure correct values of
temperature and humidity, i.e. in the height of about 150 cm, with no direct sunlight or
other heat / cool source (AHU outlets, refridgerator, electrical appliances). The device
consists of two parts: bottom with screw terminal block and cover containing PCB,
display, and the knob. The bottom part is fixed by 2 or 4 screws to any flat surface or a
flush-mounting box Ø 50 mm. At the back of the bottom there is an aperture for cabling.
The bottom should be installed and cabling connected first,and the upper part inserted
after the construction works have been finished to prevent damage to the unit.

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Seal the conduits to avoid influencing the sensor by draught. Use insulating pad when
installing the sensor on cold walls. Avoid sensor exposition to sunlight or other heat
sources.
Opening the
cover
When removing the display part, proceed as follows:
-press gently the side parts of the unit and pull the right of the display part by
several millimeters
-pull the left of the display part
-pull the display part and remove it from the bottom.
Do not bend the display part too much, the connector pins could be damaged. The
locks are only at the sides of the display part, not at the top nor bottom.
Display
Over Modbus, it is possible to set / reset the complete symbol set except for the 7
segment digits, „Error“ and „Setting“ texts, and symbols of °C, °F, %, and rH. Those are
part of the configurable menu profiles. The register description is available in a separate
document Room units UI... –Communication description.
The integrated temperature sensor range is -20 to +70 °C. Read and entered values are
available at the RS485 bus where a controller or SCADA reads them. The supervising
system can also write values to the unit (operation mode, fan stage, etc.), which are
displayed on a large LCD display. Models with digital inputs and outputs also have those
data available. It is possible to control the sunblind operation as central building
function, such as „fully closed“ at night time, „fully open“ at strong wind, etc. Those
commands must be programmed in the BMS and communicated over the RS485 bus to
the room unit. A control algorithm must be implemented in the master; for
independent communicative control use the UC..., FC... controllers.
RoHS notice
The device contains a non-rechargeable battery which backups the real-time clock and
part of the memory. After the device is not operable, please return it to the
manufacturer or dispose of it in compliance with local regulations.

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Changes in
versions
09/2016 —Changed the format and reference to the configuration software.
03/2017 —Added picture and description of the installation. Add link on the
datasheet with other colours.
05/2018 –Change technical data.