Sentera Controls RTVS8 Series Service manual

RTVS8 115—230 VAC TRANSFORMER
FAN SPEED CONTROLLER WITH
MODBUS RTU COMMUNICATION
Mounting and operating instructions

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RTVS8 115—230 VAC TRANSFORMER FAN SPEED
CONTROLLER WITH MODBUS RTU COMMUNICATION
Table of contents
SAFETY AND PRECAUTIONS 3
PRODUCT DESCRIPTION 4
ARTICLE CODES 4
INTENDED AREA OF USE 4
TECHNICAL DATA 4
STANDARDS 4
WIRING AND CONNECTIONS 5
MOUNTING INSTRUCTIONS IN STEPS 6
OPERATING INSTRUCTIONS 10
VERIFICATION OF INSTALLATION 12
TRANSPORT AND STORAGE 13
WARRANTY AND RESTRICTIONS 13
MAINTENANCE 13

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RTVS8 115—230 VAC TRANSFORMER FAN SPEED
CONTROLLER WITH MODBUS RTU COMMUNICATION
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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RTVS8 115—230 VAC TRANSFORMER FAN SPEED
CONTROLLER WITH MODBUS RTU COMMUNICATION
PRODUCT DESCRIPTION
e RTVS8 series of transformer fan speed controllers are intended for regulating the
speed of single-phase voltage controllable motors (115—230 VAC / 50—60 Hz) in five
steps by varying the output voltage. ey are equipped with auto-transformer(s) and
feature Modbus RTU communication and TK monitoring for thermal motor protection.
e unit can be controlled both in automatic mode or in manual mode. In manual mode,
the unit functions as a 5-step controller. In automatic mode, the unit can be connected
to a Sentera device allowing the unit to be used for demand-based ventilation.
ARTICLE CODES
Article code Supply voltage 115—230 VAC, Imax [A] Fuse (5*20 mm) [A]
RTVS8-15L22 1,5 T-2,5 A-H
RTVS8-25L22 2,5 T-4 A-H
RTVS8-35L22 3,5 T-5 A-H
RTVS8-50L22 5 T-8 A-H
RTVS8-75L22 7,5 T-10 A-H
INTENDED AREA OF USE
■Fan speed control of voltage controllable motors (pumps and fans) in ventilation
systems
■Demand based ventilation in greenhouses, sheds and stables.
■Ventilation based on temperature, relative humidity, carbon dioxide, air quality
(TVOC), carbon monoxide or nitrogen dioxide. Selection can be made via Modbus
holding register 18
■For indoor use, surface mounted
TECHNICAL DATA
■Supply voltage: 115—230 VAC / 50—60 Hz
■Modbus RTU communication
■TK monitoring function for thermal motor protection
■Controlled by analogue signal via DADCM
■Operating modes:
►Automatic (from low to high or from high to low): Fan speed based on input from
external Sentera sensor, DADCM 0-10 Volt module or digital potentiometer (SPV
series) connected to the RJ45 master socket
►Manual: Fan speed based on user input via Modbus Holding Register 12
■Selectable output update interval from 5 seconds to 10 minutes
■Autotransformer with voltage taps (0 / 80 / 110 / 140 / 170 / 190 / 230 VAC for
230 VAC supply and 0 / 40 / 55 / 70 / 85 / 95 / 115 VAC for 115 supply)
■LED status indication
■Modbus RTU communication via RJ45 connectors
■Unregulated ouput (relay output) 115 VAC or 230 VAC (Imax 16 A, resistive load)
■Bootloader for uploading new firmware via Modbus RTU
■Enclosure: plastic (R-ABS, UL94-V0, grey RAL 7035)
■Protection standard: IP54 (according to EN 60529)
■Operating ambient conditions:
►Temperature: -10—35 °C
►Rel. humidity: 5—85 % rH (non-condensing)
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

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RTVS8 115—230 VAC TRANSFORMER FAN SPEED
CONTROLLER WITH MODBUS RTU COMMUNICATION
■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
■WEEE Directive 2012/19/EC
■RoHs Directive 2011/65/EC
WIRING AND CONNECTIONS
Wiring and connections
Terminal block
N
MOTOR
Regulated output to motor, neutral
L Regulated output to motor, line
Pe Protective earth terminal
N
RELAY
Unregulated output that can be set manually (ON/OFF) or
automatically via Modbus Holding register 19 and 15
L
N
INPUT
Power supply, neutral
L Power supply, phase (230 VAC / 50—60 Hz)
TK Input - TK monitoring for thermal motor protection
TK
2 - RJ45 master socket - to connect a Sentera sensor-transmitter for demand
based control, or a digital potentiometer for manual control
Pin 1 24 VDC Supply voltage
Pin 2
Pin 3 AModbus RTU communication, signal A
Pin 4
Pin 5 /B Modbus RTU communication, signal /B
Pin 6
Pin 7 GND Ground, supply voltage
Pin 8
3 - RJ45 gateway - to connect a computer with 3SModbus software, Sentera
internet gateway or a BMS system
Pin 1 Do not connect to your computer
Pin 2
Pin 3 AModbus RTU communication, signal A
Pin 4
Pin 5 /B Modbus RTU communication, signal /B
Pin 6
Pin 7 Do not connect to your computer
Pin 8
/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
3
4
5
6
3
4

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RTVS8 115—230 VAC TRANSFORMER FAN SPEED
CONTROLLER WITH MODBUS RTU COMMUNICATION
ATTENTION Make sure you use cables with an appropriate diameter.
MOUNTING INSTRUCTIONS IN STEPS
Before you start mounting the unit, read carefully “Safety and Precautions”and
follow these steps. Choose a smooth solid surface for installation (a wall, panel,
etc.).
Follow these steps:
1. Unscrew the front cover and open the enclosure. Mind the flat cable that connects
the LEDs with the printed circuit board.
2. Fix the unit onto the wall or panel using the provided screws and dowels. Mind the
correct mounting position and unit mounting dimensions. (See Fig.1 Mounting
dimensions and Fig.2 Mounting position).
3. Pay attention to the following instructions in order to minimize the operating
temperature:
3.1 Respect the distances both between the wall / ceiling and the device
and between two devices as shown in Fig.2. In order to ensure sufficient
ventilation of the controller, clearance on every side has to be maintained.
3.2 When installing the device, please keep in mind that the higher you install
it, the warmer the device will get. For example, in a technical room the
correct installation height can be of great importance. Do not install the
controller above heating equipment or heat sources.
3.3 If maximum ambient temperature cannot be adhered to, please provide
extra forced ventilation / cooling.
Not respecting the above listed rules can reduce service life and relieves the
manufacturer of any responsibilities.
Fig. 1 Mounting dimensions Fig. 2 Mounting position
200
280 305
140
120
Correct Incorrect
50 mm
50 mm
50 mm
100 mm
75 mm

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RTVS8 115—230 VAC TRANSFORMER FAN SPEED
CONTROLLER WITH MODBUS RTU COMMUNICATION
4. Insert the cables through the cable glands and do the wiring according to the
wiring diagram (see Fig. 3) while adhering to the information from section
“Wiring and connections” above.
4.1 Connect the power supply line (terminals L, N marked as INPUT and Pe);
4.2 Connect the motor terminals (L and N marked as MOTOR and Pe);
4.3 If applicable, connect the unregulated output (L and N marked as RELAY).
e relay output contacts are Normal Open (NO) type - 16 A resistive with
115—230 VAC supply. e functionality of the unregulated output can
be selected via Modbus through Holding register 19. By default (factory
setting), the unregulated output indicates alarm conditions and can be
used for connecting an alarm indication device - e.g. a lamp, buzzer, etc.
4.4 Connect the TK contacts for monitoring of the thermal motor protection to
the motor TK terminals.
A safety isolator / disconnect switch should be installed on the mains electricity
side of all motor drives.
ATTENTION
Fig. 3 Wiring and connections
RJ45 master socket - to
connect Sentera HVAC
transmitter or potentiometer
RJ45 Gateway - to connect PC
with 3SModbus software
Regulated output to
motor
Relay output (unregulated output)
NO Contact, 115—230 VAC
Power supply
115—230VAC/50—60Hz
TK monitoring for thermal
motor protection
Make sure the connections are correct before you power the unit.
ATTENTION
5. Close the cover and secure it with the screws.
6. Tighten the cable glands.
7. Switch on the mains supply.
8. Customise the factory settings to the desired ones via the 3SModbus software
or Sensistant. For the default factory setting, see the Modbus register map.
e desired fan speed can be modfied via Modbus holding register 12, or set
automatically via Modbus holding register 18, according to connected sensor
output value.
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

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RTVS8 115—230 VAC TRANSFORMER FAN SPEED
CONTROLLER WITH MODBUS RTU COMMUNICATION
Optional settings
1. In automatic mode, a Sentera potentiometer with Modbus RTU communication
can be connected to RTVS8. Via the optional DADCM analogue input module,
RTVS8 series can be controlled via an external 0-10 Volt signal. To obtain
demand based fan speed control, RTVS8 can be combined with a Sentera HVAC
sensor. e combination of RTVS8 with a Sentera HVAC transmitter allows
you to control fan speed in function of temperature, relative humidity, carbon
dioxide, air quality (TVOC), carbon monoxide or nitrogen dioxide. e controlled
parameter can be selected in RTVS8 Modbus holding register 18.
Crimp the RJ45 cable for the Modbus Master connector and plug it into the socket.
It is used to connect RTVS8 to a Sentera transmitter, intelligent sensor, sensor
controller or potentiometer. Consult our website for possible combinations.
2. Crimp the RJ45 cable for the Modbus Slave connector and plug it into the socket.
It is used to connect the unit to a PC or another master device for monitoring
or manual control via Modbus holding register 12. To do so, you will need
Sentera’s Modbus to USB converter CNVT-USB-RS485-V2. To modify or monitor
parameters of a Sentera device via Modbus RTU, we advise using the 3SModbus
software.
e 3SModbus software is free and can be downloaded via our website: https://
www.sentera.eu/en/3SMCenter and installed on your computer. e Modbus to
USB converter CNVT-USB-RS485-V2 allows you to connect a Sentera device to
the USB port of your computer and to monitor or adjust the different parameters.
See Application examples 1, 2, 3 and 4.
Application example 1: Manual mode - control via Modbus holding register 12
CNVT-USB-RS485-V2 Master
RTVS8
Application example 2: Automatic mode - demand based ventilation (i.e. control
via input from sensor)
RTVS8
Sentera HVAC
sensor
CO2
Application example 3: Automatic mode - control via analogue signal
RTVS8
0 - 10 V
DADCM

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RTVS8 115—230 VAC TRANSFORMER FAN SPEED
CONTROLLER WITH MODBUS RTU COMMUNICATION
Application example 4: Automatic mode - control via a digital potentiometer
RTVS8
SPV
series
3. 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
Voltage steps
e standard configuration of the output voltages is as indicated in Table 1 below.
Table 1 Voltage steps
Steps 0 — 1 2 3 4 5
Wires —
Regulated output [230 VAC]
Voltages** 080*110 140 170 190 230
Regulated output [115 VAC]
Voltages** 040*55 70 85 95 115
*Available but not connected.
**Because more than 5 output voltages are available, it is possible to adjust
the 5 steps by changing the internal wiring
Table 2 Voltage steps
Steps* 0 1 2 3 4 5
Auto forward
mode default
values
0 % 17 % 34 % 51 % 68 % 85 %
Auto reverse mode
default values - 0 % 75 % 50 % 25 % 1 %
* Each level can take a value from 0 to 100 %.

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RTVS8 115—230 VAC TRANSFORMER FAN SPEED
CONTROLLER WITH MODBUS RTU COMMUNICATION
Operational diagram
115 VAC / 50—60 Hz power supply
0
0
55
70
85
95
115
(40)
20 40 60 80 95
0
0
110
140
170
190
230
(80)
20 40 60 80 95
Digital Control signal
(dynamic percentage) [%]
Hysteresis
2—10 %
U (VAC)/
Speed
230 VAC / 50—60 Hz power supply
0
0
55
70
85
95
115
(40)
20 40 60 80 95
0
0
110
140
170
190
230
(80)
20 40 60 80 95 Digital Control signal (dynamic
percentage) [%]
U (VAC)/
Speed
Hysteresis
2—10 %
OPERATING INSTRUCTIONS
NOTE On start-up the green COM LED blinks fast for 15 seconds to indicate that the
device is initialising.
■Make sure the connections are correct before you power the unit.
■Make sure the mains supply voltage is within the admissible rated maximum
current of the product.
ATTENTION
1. Switch off the mains power supply before connecting any power cables.
2. Install the connected sensor in an appropriate zone in order to measure the
relevant ambient conditions.
3. Select the operating mode via Modbus Holding Register 11. e default mode is
Automatic forward mode.
3.1 Manual mode
e value is taken by Holding Register 12, where you can set the desired
output step (see the steps and corresponding voltages in Table 1 above.)
3.2 Automatic modes
When Auto mode has been selected, the controller changes the five speeds
automatically according to the values measured by the sensor connected to
the RJ45 master socket. ere are two automatic modes: