COMBINED TEMPERATURE
AND RELATIVE HUMIDITY DUCT
DSTHX-2
Mounting and operating instructions
TRANSMITTER
COMBINED T AND rH DUCT
DSTHX-2
TRANSMITTER
Table of contents
SAFETY AND PRECAUTIONS 3
PRODUCT DESCRIPTION 4
ARTICLE CODES 4
INTENDED AREA OF USE 4
TECHNICAL DATA 4
STANDARDS 4
OPERATIONAL DIAGRAMS 5
WIRING AND CONNECTIONS 5
MOUNTING & OPERATING INSTRUCTIONS IN STEPS 5
OPERATING INSTRUCTIONS 8
MODBUS REGISTER MAPS 9
VERIFICATION OF INSTALLATION INSTRUCTIONS 10
TRANSPORT AND STORAGE 10
WARRANTY AND RESTRICTIONS 10
MAINTENANCE 10
MIW-DSTHX-2-EN-000 - 23 / 07 / 2019 2 - 10
www.sentera.eu
COMBINED T AND rH DUCT
DSTHX-2
TRANSMITTER
SAFETY AND PRECAUTIONS
Read all the information, the datasheet, 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 saf ety and li censing (CE ) reasons , unauthor ised conver sion and/ or modifi cations
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 treat the product as if it is
live. 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.
MIW-DSTHX-2-EN-000 - 23 / 07 / 2019 3 - 10
www.sentera.eu
back to the table of contents
COMBINED T AND rH DUCT
DSTHX-2
TRANSMITTER
PRODUCT DESCRIPTION
ARTICLE CODES
e DSTHX-2 series are dual duct transmitters which measure temperature and
relative humidity. ey feature a wide range of low voltage power supply and two
analogue / modulating outputs. All parameters are accessible via Modbus RTU.
INTENDED AREA OF USE
TECHNICAL DATA
Article code Supply
DSTHG-2
DSTHF-2
Monitoring duct temperature and relative humidity in HVAC applications
■
Selectable temperature range: -30—70 °C
■
Selectable relative humidity range: 0—100 %
■
Accurac y: ±0,4 °C (0—50 ° C); ±3 % rH (5—85 % rH), depending on the selected parameter
■
Modbus RTU communication
■
Bootloader for updating the firmware via Modbus RTU communication
■
Minimum airflow velocity required: 1 m/s
■
Enclosure and probe material:
►
ASA, grey (RAL9002)
■
Protection standard: Enclosure: IP54, probe: IP20
■
Operating ambient conditions:
►
temperature: 0—50 °C
►
rel. humidity: 5—85 % rH, (non-condensing)
■
Storage temperature: -10—60 °C
18—34 VDC 1,6 8 W 1,2 6 W 70 mA
15—24 VAC ±10% 1,8 W 1, 35 W 75 mA
18—34 VDC 1,6 8 W 1,2 6 W 70 mA
Maximum power
consumption
Nominal power
consumption
Imax
STANDARDS
■
EMC Directive 2014/30/EC:
►
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
■
WEE E Di rective 2012/19/EC
■
RoHs Directive 2011/65/EC
MIW-DSTHX-2-EN-000 - 23 / 07 / 2019 4 - 10
back to the table of contents
www.sentera.eu
COMBINED T AND rH DUCT
DSTHX-2
TRANSMITTER
OPERATIONAL DIAGRAMS
Analogue
output 1 [%]
100
-30
Min
range
Max
range
70 T [°C]
Analogue
output 2 [%]
100
0 Min
range
Max
range
100 rH [%]
WIRING AND CONNECTIONS
Article type DSTHF-2 DSTHG-2
VIN 18—34 VDC 18—34 VDC 15—24 VAC ±10%
GND Ground Common ground AC ~
A Modbus RTU (RS485), signal A Modbus RTU (RS485), signal A
/B Modbus RTU (RS485), signal /B Modbus RTU (RS485), signal /B
Analogue / modulating output 1 for
AO1
GND Ground AO1 Common ground
AO2
GND Ground AO2 Common ground
Connections Spring contact terminal blocks, cable cross section: 1,5 mm
temperature measurement (0—10 VDC /
0—20 mA / PWM)
Analogue / modulating output 2 for relative
humidity measurement (0—10 VDC /
0—20 mA / PWM)
Analogue / modulating output 1 for temperature
measurement (0—10 VDC / 0—20 mA / PWM)
Analogue / modulating output 2 for relative humidity
measurement (0—10 VDC / 0—20 mA / PWM)
2
CAUTION
MIW-DSTHX-2-EN-000 - 23 / 07 / 2019 5 - 10
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.
www.sentera.eu
back to the table of contents
Ø 12
18,5
42,3
50
4
70
66
COMBINED T AND rH DUCT
DSTHX-2
TRANSMITTER
MOUNTING & OPERATING INSTRUCTIONS IN STEPS
Before you start mounting the DSTHX-2 duct transmitter, read carefully “Safety
and Precautions”.
Follow these steps:
1. When preparing to mount the DSTHX-2, bear in mind that the unit itself must be
installed onto the outer surface of the duct both via fixing the flexible flange or
direc tly the unit enclosure, while the probe must be inserted inside the duct, see
Fig. 1 and Fig. 2 below.
Fig. 1 Mounting dimensions
With flange Without flange
2x Ø 5
60
285
86,8
100
105
Fig. 2 Mounting position
80
4x Ø 4,
34,5
Correct Incorrect
AIR F LOW
MIW-DSTHX-2-EN-000 - 23 / 07 / 2019 6 - 10
www.sentera.eu
AI R F LOW
back to the table of contents
DSTHX-2
Fig. 3 Mounting requirements
COMBINED T AND rH DUCT
TRANSMITTER
2. Having selected the appropriate mounting location, proceed with the following steps:
2.1 Drill a Ø 13 mm hole into the duct and insert the probe. Apply an air-tight
sealing between probe and duct.
2.2 Fix the flange onto the duct outer surface using the self-drilling screws
delivered with the unit. If you do not intend to use the flange, insert the
tube and fix the enclosure onto the duct. Mind the airflow direction (see
Fig. 2 and Fig. 3).
7,5*D
(1)
3,5*D
ATTENTION
ATTENTION
ATTENTION
(1)
D = Duct diameter
Installation requirements: e DSTHX-2 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 duct diameters upstream from any turns or flow obstructions.
Installation of the unit near high EMI-emitting devices may lead to faulty
measurements. Use shielded wiring in areas with high EMI.
Keep at least 15 cm distance between the sensor lines and the 230 VAC power lines.
2.3 Install the tube 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 theunit.
2.5 Do the wiring according to the information in section “Wiring and
connections” adhering to Fig. 4 below.
MIW-DSTHX-2-EN-000 - 23 / 07 / 2019 7 - 10
back to the table of contents
www.sentera.eu
COMBINED T AND rH DUCT
DSTHX-2
Example 1 Example 2
TRANSMITTER
Fig. 4 Wiring and connections
3. Close the enclosure and fix the cover.
4. Switch on the power supply.
5. Customise the factory settings to the desired ones via the 3SModbus software
or Sensistant (if necessary). For the default factory setting see Tab le Modbus
register maps.
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).
Supply voltage
DSTHF-2: 18—34 VDC
DS THG -2: 18—34 V DC /
15—24 VAC ±10 %
Modbus
RTU
A
/B
Anal ogue / modulat ing output 2 - r H
(0—10 VDC/0—20 m A / PWM)
Analogue / modulating 1 - T
(0—10 VDC/0—20 m A / PWM)
Slave 1
NBT
NOTE
CAUTION
NBT
Slave 2
Master
On a Modbus RTU network, two bus terminators (NBTs) need to be activated.
Do not expose to direct sunlight!
OPERATING INSTRUCTIONS
Calibration procedure:
Both the relative humidity and temperature sensor elements are factory calibrated.
Recalibration is not necessary.
RX
ТX
NBT
Slave n
Master
NBT
Slave 1
Slave 2
RX
ТX
NBT
Slave n
Bootloader
anks to the bootloader functionality, the sensor firmware can be updated via
Modbus RTU communication. To enter “Boot mode”, put a jumper onto pins 3 and
4 of the P1 header and restart the power supply (see Fig. 5). Once ‘Boot mode’ is
activated, the firmware can be updated via SM Boot application (part of 3SModbus
software suite) or Sensistant.
MIW-DSTHX-2-EN-000 - 23 / 07 / 2019 8 - 10
www.sentera.eu
back to the table of contents
COMBINED T AND rH DUCT
DSTHX-2
TRANSMITTER
Fig. 5 P1 header
123 45
123 45
Put a jumper onto pins 1 and 2 and wait
for at least 5 seconds to reset the Modbus
communication parameters
Put a jumper onto pins 3 and 4 and restart
the supply to enter bootloader mode
MODBUS REGISTER MAPS
INPUT REGISTERS
Input Registers Data type Description Data Values
MODBUS REGISTER MAP
1 Temperature reading si gned int Actual temperature level -300—700 500 = 50,0°C
2 Output v alue 1 (T) un signed int Output v alue 1 (T) 0—1.000
3 Temperatu re alert a g unsigned int
4 Temperatu re range limit ag unsigned int
5 Humidity, temperature sensor fault unsigned int
6—9 Reser ved, retur n 0
10 Relative humidity level uns igned int Actual r elative humi dity level 0—1.000 1.000 = 100,0 % rH
11 Output v alue 2 (rH) unsigned int Out put value 2 (rH) 0—1.000
12 Relative humi dity aler t ag unsigned int
13 Relative humi dity range l imit ag unsigned int
14 Humidity, temperature sensor fault unsigned int
15 Dew point leve l signed in t Calculated dew point -700—700 200 = 20,0°C
16—50 Reser ved, retur n 0
Flag indi cates that m easured Tempe rature is out side set alert v alues. Set to
'1' when the measured value is outside the Temperature alert values dened
by holding r egister s 13 and 14
Flag indi cates that m easured te mperatur e is outside s et range limit
values. S et to '1' when the meas ured tempe rature is ou tside limit r ange
values de ned by holdi ng registe rs 11 and 12
Flag that s hows if the com munication w ith temper ature & humidi ty sensor
is lost
Flag indi cates that m easured Rel ative humidit y is outsid e set alert
values. S et to '1' when the meas ured value is o utside the Re lative
humidit y alert val ues dened by h olding regi sters 21 and 22
Flag indi cates that m easured Rel ative humidit y is outsid e set range lim it
values. S et to '1' when the meas ured Relati ve humidity i s outside limi t
range val ues dened by h olding regi sters 19 and 20
Flag that s hows if the com municatio n with temper ature & humidi ty
senso r is lost
0—1
0—1
0—1
0—1
0—1
0—1
0 = Temperature measurement OK
1 = Temperatu re measure ment too low/
0 = Temperatu re range OK
1 = Temperatu re range too l ow/high
0 = Relative h umidity mea surement O K
1 = Relative h umidity mea surement t oo
0 = Relative h umidity ran ge OK
1 = Relative h umidity ran ge too low/high
0 = 0 %
1.000 = 100 %
0 = No
1 = Yes
0 = 0 %
1.000 = 100 %
low/hi gh
0 = No
1 = Yes
high
HOLDING REGISTERS
Holding Registers Data type Descrip tion Data Values
1 D evice slave ad dress unsigned int Modbus device address
2 M odbus baud rate unsigned int Modbus communication baud rate
3 Mo dbus parity unsigned int Parit y check mod e
4 D evice type unsigned int Device type. Read only
5 H W version unsigned int Hardwar e version of t he device. Rea d only XXXX 0x0100 = HW vers ion 1.0
6 F W versio n unsigned int Firmware v ersion of th e device. Read o nly XXXX 0x0200 = F W version 2.2
7 Re served, re turns 0
8 M odbus safe ty timeou t unsigned int
Modbus n etwork re sistor
9
termination (NBT)
10 Modbus r egister s reset unsigned int
11 Minimum temperature rang e unsigned int
12 Maximum temperature range unsigned int
13 Minimum temperature alert unsigned int Minimum temperature alarm value
14 Maximum temperature alert unsigned int Maximum temperature alarm value
15 —18 Reser ved, retur n 0
unsigned int
Afte r time with no Mo dbus communi cation,
output s are set to 0.
Set devic e as end devic e of the line / or not by
connecting NBT
Reset s Modbus Hold ing regist ers to defau lt
values. W hen finish ed this regi ster is
automatically reset to '0'
Minimum value of temperature range, cannot
be set hig her than maximu m temperat ure
range min us 5°C
Maximum value of temperature range, cannot
be set le ss than minimum t emperatur e range
plus 5°C
1—247
default: 1
0—6
default: 2
0— 2
default: 1
DSTHG -2 = 1.632
DSTHF-2 = 1.633
0—60
default: 0
0—1
default: 0
0—1
default: 0
-300 - (Max-50)
default: 0
(Min+50)—700
default: 5 00
Min. tempe rature ra nge —Max.
temperature alarm
default: 0
Min. tempe rature ala rm —Max.
temperature range
default: 5 00
0 = 4.800
1 = 9.600
2 = 19.200
3 = 38.400
4 = 57.600
5 = 115.200
6 = 230.400
0 = 8N1
1 = 8E1
2 = 8O1
60 = 60 minut es
0 = NBT disc onnecte d
1 = NBT conn ected
1 = Reset Mo dbus Regist ers
0 = Idle
100 = 10,0 °C
500 = 50,0°C
500 = 50,0°C
500 = 50,0°C
MIW-DSTHX-2-EN-000 - 23 / 07 / 2019 9 - 10
www.sentera.eu
back to the table of contents
COMBINED T AND rH DUCT
DSTHX-2
HOLDING REGISTERS
Holding Registers Data type Descrip tion Data Values
Minimum relative humidity
19
range
Maximum relative humidity
20
range
Minimum relative humidity
21
alert
Maximum relative humidity
22
alert
23—40 Reser ved, return 0
41 Out put 1 type (T ) unsigned int Selec t analogue / mo dulating out put 1 type
42 Output 1 ove rwrite ( T) unsigned int
43 Output 1 over write valu e (T) un signed int
Internal voltage source
44
selec tion Outpu t 1 (T)
45—50 Res erved, re turn 0
51 Output 2 t ype (rH) unsigned int Selec t analogue / mo dulating out put 2 type.
52 Output 2 over write (rH) unsigne d int
Output 2 ove rwrite va lue
53
(rH )
Internal voltage source
54
selec tion Outpu t 2 (rH)
55—80 Reser ved, retu rn 0
If you want to nd o ut more about M odbus over se rial line, ple ase visit: http://www.modbus.org/docs/Modbus_over_serial_line _V1_02.pdf
TRANSMITTER
unsigned int
unsigned int
unsigned int Minimum relative humidity alarm value
unsigned int Maximum relative humidity alarm value
unsigned int
unsigned int
unsigned int
Minimum val ue of relativ e humidity ra nge,
cannot b e set higher th an maximum rel ative
humidity range minus 5%
Maximum va lue of relati ve humidity r ange,
cannot b e set less tha n minimum rela tive
humidity range plus 5%
Enable s the direct c ontrol over t he tempera ture
output.
Overw rite value fo r output 1. Acti ve only if
Holding r egister 42 is s et to 1.
Selec tion of inter nal voltage s ource for P WM
output 1.
Enable s the direct c ontrol over t he relative
humidity output.
Overw rite value fo r output 2. Act ive only if
Holding r egister 52 i s set to 1.
Selec tion of inter nal voltage s ource for P WM
output 2.
0—( Max-5 0)
default: 0
(Min+50)—1.000
defau lt: 1.000
Min. rela tive humidit y range—Max.
relative humidity alarm
default: 0
Min. rela tive humidit y alarm —Max.
relative humidity range
defau lt: 1.000
1—3
default: 1
0—1
default: 0
0—1.000
default: 0
0—1
default: 0
1—3
default: 1
0—1
default: 0
0—1.000
default: 0
0—1
default: 0
200 = 20,0 % rH
850 = 85 % rH
200 = 20,0 % rH
850 = 85 % rH
1 = 0—10 VDC
2 = 0—20 mA
3 = PWM
0 = Disabl ed
1 = Enable d
0 = 0 %
1.000 = 100 %
0 = 3,3 VDC
1 = 12 VDC
1 = 0—10 VDC
2 = 0—20 mA
3 = PWM
0 = Disabl ed
1 = Enable d
0 = 0 %
1.000 = 100 %
0 = 3,3 VDC
1 = 12 VDC
VERIFICATION OF INSTALLATION INSTRUCTIONS
If your unit does not function as expected, please check the connections.
TRANSPORT AND STORAGE
Avoid shocks and extreme conditions; store in original packing.
WARRANTY AND RESTRICTIONS
Two years from the delivery date against defects in manufactur ing. 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 completelydry.
MIW-DSTHX-2-EN-000 - 23 / 07 / 2019 10 - 10
www.sentera.eu
back to the table of contents
Loading...