Sentera Controls DCVCX-R Service manual

DCVCX-R INTELLIGENT AIR QUALITY
DUCT SENSOR
Mounting and operating instructions

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DCVCX-R
INTELLIGENT AIR QUALITY
DUCT SENSOR
Table of contents
SAFETY AND PRECAUTIONS 3
PRODUCT DESCRIPTION 4
ARTICLE CODE 4
INTENDED AREA OF USE 4
TECHNICAL DATA 4
STANDARDS 4
OPERATIONAL DIAGRAMS 5
WIRING AND CONNECTIONS 5
MOUNTING & OPERATING INSTRUCTIONS IN STEPS 6
OPERATING INSTRUCTIONS 9
VERIFICATION OF INSTALLATION 9
TRANSPORT AND STORAGE 9
WARRANTY AND RESTRICTIONS 9
MAINTENANCE 9

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DCVCX-R
INTELLIGENT AIR QUALITY
DUCT SENSOR
SAFETY AND PRECAUTIONS
Read all the information, the datasheet, Modbus map, mounting and operating
instructions and study the wiring and connection diagram before working with
the product. For personal and equipment safety, and for optimum product
performance, make sure you entirely understand the contents before installing,
using or maintaining this product.
For safety and licensing (CE) reasons, unauthorised conversion and/ or modifications
of the product are inadmissible.
e product should not be exposed to abnormal conditions, such as extreme
temperatures, direct sunlight or vibrations. Long-term exposure to chemical
vapours in high concentration can affect the product performance. Make sure the
work environment is as dry as possible; avoid condensation.
All installations shall comply with local health and safety regulations and local
electrical standards and approved codes. is product can only be installed by
an engineer or a technician who has expert knowledge of the product and safety
precautions.
Avoid contacts with energised electrical parts. Always disconnect the power
supply before connecting, servicing or repairing the product.
Always verify that you apply appropriate power supply to the product and use
appropriate wire size and characteristics. Make sure that all the screws and nuts
are well tightened and fuses (if any) are fitted well.
Recycling of equipment and packaging should be taken into consideration and these
should be disposed of in accordance with local and national legislation/regulations.
In case there are any questions that are not answered, please contact your
technical support or consult a professional.

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DCVCX-R
INTELLIGENT AIR QUALITY
DUCT SENSOR
PRODUCT DESCRIPTION
e DCVCX-R are intelligent duct sensors featuring adjustable temperature, relative
humidity and TVOC ranges. e used algorithm controls a single analogue/modulating
output based on the measured temperature, relative humidity and air quality values,
which can be used to directly control an EC fan, an AC fan speed controller or an
actuator powered damper. All parameters are accessible via Modbus RTU.
ARTICLE CODE
Article code Supply Imax
DCVCG-R 18—34 VDC 45 mA
15—24 VAC ±10% 50 mA
DCVCF-R 18—34 VDC 45 mA
INTENDED AREA OF USE
■Demand controlled ventilation based on temperature, relative humidity and TVOC
■Suitable for mounting in air ducts
TECHNICAL DATA
■Analogue / modulating output type:
►0—10 VDC mode: RL≥ 50 kΩ
►0—20 mA mode: RL≤ 500 Ω)
►PWM (open-collector type) mode: PWM Frequency: 1 kHz, RL≥ 50 kΩ; PWM
voltage level 3,3 VDC or 12 VDC
■Replaceable TVOC sensor module
■Selectable temperature range: -30—70 °C
■Selectable relative humidity range: 0—100 % rH
■Selectable ТVOC range: 0—60.000 ppb
■Warm-up time: 15 minutes
■Accuracy: ±0,4 °C (-30—70 °C); ±3 % rH (0—100 % rH); ±15% TVOC (0—60.000 ppb)
■Minimum airflow velocity required: 1 m/s
■Enclosure and probe material:
►ASA, grey (RAL9002)
■Protection standard: enclosure: IP54, probe: IP20
■Operating ambient conditions:
►temperature: -30—70 °C
►rel. humidity: 0—100 % rH, (non-condensing)
■Storage temperature: -10—60 °C
STANDARDS
■Low Voltage Directive 2014/35/EC
►EN 60529:1991 Degrees of protection provided by enclosures
(IP Code) Amendment AC:1993 to EN 60529
►EN 60730-1:2011 Automatic electrical controls for household and similar use -
Part 1: General requirements
■EMC Directive 2014/30/EC
►EN 60730-1:2011 Automatic electrical controls for household and similar use -
Part 1: General requirements
►EN 61000-6-1:2007 Electromagnetic compatibility (EMC) - Part 6-1: Generic
standards - Immunity for residential, commercial and light-industrial environments
►EN 61000-6-3:2007 Electromagnetic compatibility (EMC) - Part 6-3: Generic
standards - Emission standard for residential, commercial and light-industrial
environments Amendments A1:2011 and AC:2012 to EN 61000-6-3

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DCVCX-R
INTELLIGENT AIR QUALITY
DUCT SENSOR
►EN 61326-1:2013 Electrical equipment for measurement, control and laboratory
use - EMC requirements - Part 1: General requirements
►EN 61326-2-3:2013 Electrical equipment for measurement, control and
laboratory use - EMC requirements - Part 2-3: Particular requirements - Test
configuration, operational conditions and performance criteria for transducers
with integrated or remote signal conditioning
■WEEE Direc tive 2012/19/ EC
■RoHs Directive 2011/65/EC
OPERATIONAL DIAGRAMS
Max
range
Min
range
60
40
100
0
rH Min range
-30
0
0TVOC Min range TVOC Max range
Max
Min
T Min range T Max range
rH Max range
AO1 [%]
70
100
60.000
rH
[%]
T
[°C]
TVOC
[ppb]
e output changes automatically depending on the highest of the T, rH or TVOC
values, i.e. the highest of the three output values controls the output. See the
green line in the operational diagram above. One or multiple sensors can be
deactivated. E.g. it is also possible to control the output based on the measured
TVOC value only.
NOTE
WIRING AND CONNECTIONS
Article type DCVCF-R DCVCG-R
VIN 18—34 VDC 18—34 VDC 15—24 VAC ±10%
GND Ground Common ground AC ~
AModbus RTU (RS485), signal A Modbus RTU (RS485), signal A
/B Modbus RTU (RS485), signal /B Modbus RTU (RS485), signal /B
AO1 Analogue / modulating output (0—10 VDC / 0—20 mA / PWM)
GND Ground AO Common ground
Connections Spring contact terminal blocks, cable cross section: 1,5 mm2

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DCVCX-R
INTELLIGENT AIR QUALITY
DUCT SENSOR
e -F version of the product is not suited for 3-wire connection. It has separate
grounds for power supply and analogue output. Connecting both grounds together
might result in incorrect measurements. Minimum 4 wires are required to connect
-F type sensors.
e -G version is intended for 3-wire connection and features a ‘common ground’.
is means that the ground of the analogue output is internally connected with
the ground of the power supply. For this reason, -G and -F types cannot be
used together on the same network. Never connect the common ground of -G
type articles to other devices powered by a DC voltage. Doing so might cause
permanent damage to the connected devices.
ATTENTION
MOUNTING & OPERATING INSTRUCTIONS IN STEPS
Before you start mounting the unit, read carefully “Safety and Precautions”.
e sensor is not designed, manufactured or intended for control or monitoring
equipment in environments requiring life safety performance, in which the failure
of the sensor could lead directly to death, personal injury or severe physical or
environmental damage.
NOTE
e compounds released from plastics may influence the sensor readings. Please
allow several days for the sensor to stabilize before you obtain the accurate
values.
NOTE
Follow these steps:
1. When preparing to mount the unit, bear in mind that the probe opening must be
positioned in the centre of the duct. Always use the flange to install the sensor on
round ducts. It is possible to install the sensor without the flange on rectangular
ducts (if necessary), see Fig. 1 and Fig. 2 below.

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DCVCX-R
INTELLIGENT AIR QUALITY
DUCT SENSOR
Fig. 1 Mounting dimensions
With flange Without flange
60
Ø 12
2x Ø 5
86,8
18,5
42,3
50
285
Probe opening
243
34,5
4x
Ø 4,4
70
66
100
105
80
Fig. 2 Mounting position
Correct Incorrect
AIR FLOW AIR FLOW
2. Having selected the appropriate mounting location, proceed with the following steps:
2.1 Drill an airtight sealing Ø 13 mm hole into the duct.
2.2 Fix the flange onto the outer surface of the duct, using the self-drilling
screws delivered with the unit. If you do not intend to use the flange, insert
the probe and fix the enclosure onto the duct. Mind the airflow direction
(see Fig. 2 and Fig. 3).

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DCVCX-R
INTELLIGENT AIR QUALITY
DUCT SENSOR
Fig. 3 Mounting requirements
7,5*D(1)3,5*D
(1)D = Duct diameter
Installation requirements: e unit must not be installed in turbulent air zones.
Ensure sufficiently long settling zones upstream and downstream of the tapping
point. A settling zone consists of a straight section of pipe or duct with no
obstructions. Avoid installation near filters, cooling coils, fans, etc. e sensor
will achieve the optimal result when the measurement is taken at least 7,5 duct
diameters downstream and at least 3,5 duct diameters upstream from any turns
or flow obstructions.
ATTENTION
ATTENTION Installation of the unit near high EMI-emitting devices may lead to faulty
measurements. Use shielded wiring in areas with high EMI.
ATTENTION Keep at least 15 cm distance between the sensor lines and the 230 VAC power lines.
2.3 Install the probe at the desired depth, and in case you use the flange, fix it
via the plastic white screw in the flexible flange.
2.4 Unscrew the cover of the unit to remove it and insert the connecting cables
through the cable gland of theunit.
2.5 Do the wiring according to the wiring diagram (see Fig.4) adhering to the
information from section “Wiring and connections”.
Fig. 4 Wiring and connections
Modbus
RTU
A
/B
Analogue / modulating
output 1 - Т, rH or TVOC
(0—10 VDC/0—20 mA / PWM)
Supply voltage
DCVCF-R: 18—34 VDC
DCVCG-R: 18—34 VDC /
15—24 VAC ±10 %
3. Close the enclosure and secure it with the screws. Tighten the cable gland to
retain the IP rating of the enclosure.
4. Switch on the power supply.

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DCVCX-R
INTELLIGENT AIR QUALITY
DUCT SENSOR
5. Customise the factory settings to the desired ones via the 3SModbus software
or Sensistant (if necessary). For the default factory settings see the Modbus
register map of the product.
For the complete Modbus register data, see the Modbus Register Map of the
product. is is a separate document linked to the article code on the website
containing the list of registers. Products with earlier firmware versions may not
be compatible with this list.
NOTE
Optional settings
To assure correct communication, the NBT needs to be activated in only two devices
on the Modbus RTU network. If necessary, enable the NBT resistor via 3SModbus or
Sensistant (Holding register 9).
Example 1 Example 2
RX
ТX
NBT
NBT
Slave 2
Master
Slave n
Slave 1
Slave 2
Slave 1
RX
ТX
NBT
NBT
Master
Slave n
On a Modbus RTU network, two bus terminators (NBTs) need to be activated.
NOTE
Do not expose to direct sunlight!
CAUTION
OPERATING INSTRUCTIONS
NOTE e warm-up time for the sensor to attain its highest accuracy and performance
level once the voltage supply has been applied is 15 minutes. During the warm-up
time TVOC measurements will return 0 ppb.
Calibration procedure:
Sensor calibration is not necessary. All sensor elements are calibrated and tested in
our factory.
In the unlikely event of TVOC sensor element failure, this component can be replaced.
Firmware update
New functionalities and bug fixes are made available via a firmware update. In
case your device does not have the latest firmware installed, it can be updated.
SenteraWeb is the easiest way to update the firmware of the unit. In case you do not
have an internet gateway available, the firmware can be updated via the 3SM boot
application (part of the Sentera 3SMcenter software suite).
NOTE Make sure the power supply does not get interrupted during “bootload” procedure.

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DCVCX-R
INTELLIGENT AIR QUALITY
DUCT SENSOR
VERIFICATION OF INSTALLATION
If your unit does not function as expected, please check the connections.
TRANSPORT AND STORAGE
Avoid shocks and extreme conditions; stock in original packing.
WARRANTY AND RESTRICTIONS
Two years from the delivery date against defects in manufacturing. Any modifications
or alterations to the product after the date of publication relieve the manufacturer
of any responsibilities. e manufacturer bears no responsibility for any misprints or
mistakes in this data.
MAINTENANCE
In normal conditions this product is maintenance-free. If soiled, clean with a dry or
damp cloth. In case of heavy pollution, clean with a non-aggressive product. In these
circumstances the unit should be disconnected from the supply. Pay attention that
no fluids enter the unit. Only reconnect it to the supply when it is completely dry.