Sentera Controls RSTHM-2 Service manual

Mounting and operating instructions
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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
MOUNTING & OPERATING INSTRUCTIONS IN STEPS 5
OPERATING INSTRUCTIONS 7
VERIFICATION OF INSTALLATION INSTRUCTIONS 8
MODBUS REGISTER MAPS 8
TRANSPORT AND STORAGE 10
WARRANTY AND RESTRICTIONS 10
MAINTENANCE 10
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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 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 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.
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PRODUCT DESCRIPTION
e RSTHM-2 series are combined room transmitters which measure
temperature, relative humidity and ambient light. ey are Power over
Modbus supplied and all the parameters are accessible via Modbus RTU.
ARTICLE CODES
Code Supply Connection
RSTHM-2 24 VDC, PoM RJ45
INTENDED AREA OF USE
■Monitoring indoor temperature and relative humidity in HVAC applications
■Suitable for residential and commercial buildings
■For indoor use only
TECHNICAL DATA
■Maximum power consumption: 0,0,312 W
■Nominal power consumption in normal operation: 0,0,234 W
■Imax: 13 mA
■Selectable temperature range: 0—50 °C
■Selectable relative humidity range: 5—85 %
■Ambient light sensor with adjustable ‘active’ and ‘standby’ level
■Bootloader for updating the firmware via Modbus RTU communication
■3 LEDs for status indication
■Accuracy: ±0,4 °C (0—50 °C); ±3 % rH (5—85 % rH), depending on the selected
parameter
■Enclosure:
►rear plate: plastic ABS, black (RAL 9004)
►front cover: ASA, ivory (RAL 9010)
■Protection standard: IP30 (according to EN 60529)
■Operating ambient conditions:
►temperature: 0—50 °C
►rel. humidity: 5—85 % rH, (non-condensing)
■Storage temperature: -10—60 °C
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STANDARDS
■Low Voltage Directive 2014/35/EC; EN 60529:1991; EN 60730-1:2011
■EMC Directive 2014/30/EC; EN 60730-1:2011, EN 61000-6-1:2007, EN 61000-6-
3:2007, EN 61326-1:2013, EN 61326-2-3:2013
■WEEE 2012/19/EC
■RoHs Directive 2011/65/EC
OPERATIONAL DIAGRAMS
10
20
30
40
50
60
70
80
90
100
Minimum
range
Minimum
alert
Maximum
alert
Input register 1
or 2 [%]
T [°C] / rH [%] *
Maximum
range
Out of
range
Within
range
Alert rangeAlert rangeOut of
range
* LED indications refer to T (default) or rH, depending on the selected parameter
MOUNTING & OPERATING INSTRUCTIONS IN STEPS
Before you start mounting the RSTHM-2 room transmitter, read carefully “Safety
and Precautions”. Choose a smooth surface for installation (a wall, panel and etc.).
Follow these steps:
1. Using a flat screwdriver, remove the front white cover by releasing the snap-fits
on its both sides (see Fig. 1 Snap-fits release).
2. Insert the crimped RJ45 cable through the opening on the rear plate and plug it
into the socket (see Fig. 2 Mounting dimensions).
3. Using suitable fastening materials (not supplied), position the room sensor at
least 1,5 m from the floor. When planning the installation, allow enough clearance
for maintenance and service. Mount the sensor in a well-ventilated area. Mind
the correct mounting position and unit dimensions. See Fig. 2 and Fig. 3.
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Fig. 1 Snap-fits release Fig. 2 Mounting dimension Fig. 3 Mounting position
2x Ø 6
59,8
9,8
74,5
104,5
20
104,5
25,6
70,5
Correct Incorrect
Position at min. 1,5 m
from the floor
4. Do the wiring according to the wiring diagram (see Fig.4).
Fig. 4 Wiring diagram
/B
A
GND
24 VDC
8 mm 8 mm 8 mm 8 mm
RJ45
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8
24 VDC GND A /B
Supply voltage
24 VDC Ground
Modbus RTU
communication,
signal A
Modbus RTU
communication,
signal /B
/B
A
GND
24 VDC
8 mm
8 mm
8 mm
8 mm
RJ45
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
5. Put back the cover and snap it in.
6. Switch on the mains supply.
5.
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Optional settings
If your unit is the first or the last unit on the Modbus RTU network (see Example 1 and
Example2), enable the NBT resistor via 3SModbus or Sensistant (Holding Register 30).
If your device is not an end device, leave the NBT disabled (default Modbus setting).
Example 1 Example 2
RX
ТX
NBT
NBT
NBT
Slave 2
Master
Slave n
Slave 1
Slave 2
Slave 1
RX
ТX
NBT
NBT
Master
Slave n
ATTENTION
t
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.
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.
Fig. 5 P1 header
12345
Put a jumper onto pins 1 and 2
and wait for at least 5 seconds to
reset the Modbus communication
parameters
12345
Put a jumper onto pins 3 and 4
and restart the supply to enter
bootloader mode
LED indications
1. When the green LED is on, the measured value (temperature or relative humidity)
is between the minimum and maximum alert range values (Fig 6 - 1).
2. When the yellow LED is on, the measured value (temperature or relative humidity)
is in the alert range (Fig 6 - 2).
3. When the red LED is on, the measured value (temperature or relative humidity)
is below the minimum measurement range value or above the maximum value.
Blinking red LED indicates loss of communication with a sensor (Fig 6 - 3).
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Fig. 6 LED indications
3
2
1
NOTE By default, the LED indication refers to temperature measurements. is can be
changed to relative humidity values via Modbus Holding Register 26 (see Table
Holding registers below).
Ambient light sensor
It measures the ambient light levels in order to activate or deactivate Input Register 6.
ere are two Holding Registers for setting Active or Standby light level in luxes.
■If the measured light level is below the Standby level, Input Register 6 indicates “Standby”.
■If the measured ambient light level is above the Active level, Input Register 6
indicates “Active”.
■If the measured ambient light level is between the Active and Stand-by level, Input
Register 6 indicates “Low intensity”, therefore it is advisable to set Active and
Standby levels in Holding Registers 34 and 35 according to the ambient lighting.
VERIFICATION OF INSTALLATION INSTRUCTIONS
After switching on the power supply one of the LEDs light up according to the status
of the measured variable. If this is not the case, check the connections.
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MODBUS REGISTER MAPS
INPUT REGISTERS
Data type Description Data Values
1Temperature reading signed int. Actual temperature level -300—700 500 = 50,0 °C
2Relative humidity level unsigned int. Actual relative humidity level 0—1.000 1.000 = 100,0 % rH
3Dew point signed int. Calculated dew point -700—700 200 = 20,0 °C
4 Reserved, returns “0”.
5Ambient light intensity unsigned int. Measured light intensity 0—32.000 1.000 = 1.000 lx
6 Active / standby unsigned int.
Active or Standby indication according the Active /
Standby light level defined via holding registers 34
and 35. If the measured light level is between the
two levels the indication is 0 (Low intensity)
0—2
0 =
1 =
2 =
Low light intensity
Active
Standby
7—10 Reserved, return “0”.
11 Output value 1
(temperature) unsigned int. Analog output value for temperature (T) 0—1.000 0 = 1.000 =
0 %
100 %
12 Output value 2 (relative
humidity) unsigned int. Analog output value for relative humidity (rH) 0—1.000 0 = 1.000 =
0 %
100 %
13 Reserved, returns “0”.
14 Temperature alert flag unsigned int.
Flag indicates that measured temperature is outside
set alert values. Set to ‘1’ when the measured value
is outside the temperature alert values defined by
holding registers 20 and 21.
0—1 0 =
1 =
Measured temperature is OK
Measured temperature is too high/ low
15 Relative humidity alert flag unsigned int.
Flag indicates that measured relative humidity
is outside set alert values. Set to ‘1’ when the
measured value is outside the relative humidity alert
values defined by holding registers 22 and 23.
0—1 0 =
1 =
Measured rH is OK
Measured rH is too high/ low
16 Reserved, return “0”.
17 Temperature range limit flag unsigned int.
Flag indicates that measured temperature is outside
set range limit values. Set to ‘1’ when the measured
value is outside the temperature range limit values
defined by holding registers 14 and 15.
0—1 0 =
1 =
Temperature range is OK
Temperature range is too high/ low
18 Relative humidity range
limit flag unsigned int.
Flag indicates that measured relative humidity is
outside set range limit values. Set to ‘1’ when the
measured value is outside the relative humidity limit
range values defined by holding registers 16 and 17.
0—1 0 =
1 =
rH range is OK
rH range is too high/ low
19 Reserved, returns “0”.
20 Humidity / temperature
sensor fault unsigned int. Flag indicates if the communication with the temperature and humidity sensor is lost. 0—1 0 = 1 =
No
Yes
21 Reserved, returns “0”.
22 Ambient light sensor fault unsigned int. Flag that shows if the communication with the
ambient light sensor is lost. 0—1 0 = 1 =
No
Yes
HOLDING REGISTERS
Data type Description Data Default Values
1Device slave address unsigned int. Modbus device address 1—247 1 
2Modbus baud rate unsigned int. Modbus communication baud rate 0—6 2
0 =
1 =
2 =
3 =
4 =
5 =
6 = 
4.800
9.600
19.200
38.400
57.6 00
115.200
230.400
3Modbus parity mode unsigned int. Parity check mode 0—2 1
0 =
1 =
2 =
8N1
8E1
8O1
4Device type unsigned int. Device type (Read only) RSTHM-2 = 1094 
5HW version unsigned int. Hardware version of the device (Read only) XXXX 0x0100 = HW version 1.00
6FW version unsigned int. Firmware version of the device (Read only) XXXX 0x0100 = FW version 1.00
7—13 Reserved, return “0”.
14 Minimum temperature
range unsigned int.
Minimum value of the temperature
range; cannot be set higher than max.
temperature range minus 5ºC
0 — (Max. range — 50) 0100 = 10,0 °C
15 Maximum temperature
range unsigned int.
Maximum value of temperature
range; cannot be set lower than min.
temperature rang e plus 5ºC
(Min. range + 50) – 500 500 500 = 50,0 °C
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HOLDING REGISTERS
16 Minimum relative
humidity range unsigned int. Minimum value of the rH range; cannot be set higher than max. rH range minus 5 % 50 — (Max. range — 50) 50 200 = 20,0 % rH
17 Maximum relative
humidity range unsigned int. Maximum value of rH range; cannot be set lower than min. rH range plus 5% (Min. range + 50) – 850 850 850= 85,0 % rH
18—19 Reserved, return “0”.
20 Minimum temperature
alert unsigned int. Minimum temperature alarm value Min. temperature range — Max. temperature alarm 0100 = 10,0 ºC
21 Maximum
temperature alert unsigned int. Maximum temperature alarm value Min. temperature alarm — Max. temperature range 500 500 = 50,0 ºC
22 Minimum relative
humidity alert unsigned int. Minimum relative humidity alarm value Min. relative humidity range — Max. relative humidity alarm 50 200 = 20,0 % rH
23 Maximum relative
humidity alert unsigned int. Maximum relative humidity alarm value. Min. relative humidity alarm — Max. relative humidity range 850 850 = 85,0 % rH
24—25 Reserved, return “0”.
26 LED indication unsigned int. LED indication related to one of the
parameters 1—2 11 = 2 =
Temperature
rH
27—29 Reserved, return “0”.
30
Modbus network
resistor termination
(NBT)
unsigned int. Sets device as ending the line or not by
connecting NBT 0—1 00 = 1 =
NBT disconnected
NBT connected
31—33 Reserved, return “0”.
34 Active light level unsigned int. e ambient light level above which
‘Active’ is indicated in input register 6 0—32.000 100 100= 100 l x
35 Standby light level unsigned int. e ambient light level below which
‘Standby’ is indicated in input register 6 0—32.000 10 10 = 10 lx
36 Modbus registers
reset unsigned int.
Resets Modbus Holding registers to
default values. When finished this register
is automatically reset to ‘0’
0—1 00 =
1 =
Idle
Reset Modbus registers
37—40 Reserved, return “0”
If you want to find out more about Modbus over serial line, please visit: http://www.modbus.org/docs/Modbus_over_serial_line_V1_02.pdf
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.
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