Sentera Controls STVS1 Series Service manual

STVS1 230 VAC TRANSFORMER
CONTROLLER WITH
ANALOGUE INPUT
Mounting and operating instructions

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STVS1 230 VAC TRANSFORMER CONTROLLER WITH
ANALOGUE INPUT
Table of contents
SAFETY AND PRECAUTIONS 3
PRODUCT DESCRIPTION 4
ARTICLE CODES 4
INTENDED AREA OF USE 4
TECHNICAL DATA 4
STANDARDS 4
OPERATIONAL DIAGRAM 5
WIRING AND CONNECTIONS 5
MOUNTING INSTRUCTIONS IN STEPS 6
VERIFICATION OF INSTALLATION 8
TRANSPORT AND STORAGE 9
WARRANTY AND RESTRICTIONS 9
MAINTENANCE 9

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STVS1 230 VAC TRANSFORMER CONTROLLER WITH
ANALOGUE INPUT
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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STVS1 230 VAC TRANSFORMER CONTROLLER WITH
ANALOGUE INPUT
PRODUCT DESCRIPTION
e STVS1 series of transformer fan speed controllers regulate the speed of
single-phase voltage controllable motors in five steps by varying the output
voltage according to an 0—10 VDC analogue input signal. ey are equipped with
autotransformer(s) and feature TK monitoring for thermal motor protection. e
controllers up to 7,5 A are available in plastic enclosure, while the models above 7,5
A are available in a metal enclosure.
ARTICLE CODES
Article code Rated max. current [A] Fuse [A]
STVS1-15L22 1,5 (5*20 mm) T-2,5 A-H
STVS1-25L22 2,5 (5*20 mm) T-4,0 A-H
STVS1-35L22 3,5 (5*20 mm) T-5,0 A-H
STVS1-50L22 5,0 (5*20 mm) T-8,0 A-H
STVS1-75L22 7,5 (6*32 mm) T-12,5 A-H
STVS1100L22 10,0 (6*32 mm) T-16,0 A-H
STVS1130L22 13,0 (6*32 mm) T-20,0 A-H
INTENDED AREA OF USE
■Fan speed control of voltage controllable motors (pumps and fans) in ventilation
systems
■For indoor use only
TECHNICAL DATA
■Supply voltage: 230 VAC / 50—60 Hz
■Maximum motor current (Imax): 13 A
■Unregulated output: 230 VAC (Imax. 2 A)
■TK monitoring for thermal motor protection
■12 VDC to supply an external device (e.g. potentiometer)
■5 switching levels according to the input signal
■LED status indication
■Enclosure: plastic (R-ABS, UL94-V0, grey RAL 7035) or sheet steel (RAL 7035,
polyester powder coating), depending on the product version
■Protection standard: IP54 (according to EN 60529)
■Operating ambient conditions:
►Temperature: -20—35 °C
►Rel. humidity: 5—95 % rH (non-condensing)
STANDARDS
■Low Voltage Directive 2014/35/EC
■EMC Directive 2014/30/EC: EN 61326
■WEEE Directive 2012/19/EC
■RoHs Directive 2011/65/EC

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STVS1 230 VAC TRANSFORMER CONTROLLER WITH
ANALOGUE INPUT
OPERATIONAL DIAGRAM
L22 series
Analogue input /
Control signal
U (VAC)/
Speed
04689,5
110
0
140
170
190
230
2
Switching levels Up 2; 4; 6; 8; 9,5 VDC
Down Up level — 0,2 VDC
WIRING AND CONNECTIONS
Wiring and connections
LPower supply, phase (230 VAC / 50—60 Hz)
NPower supply, neutral
Pe Earth terminal
Pe Earth terminal
L1 Unregulated output, line
N1 Unregulated output, neutral
N1 Regulated output to motor, neutral
URegulated output to motor, line
TK Input - TK monitoring for thermal motor protection
TK
0V Ground
+12V Output 12 VDC / Imax 50 mA
+V* Digital output 12 VDC / Imax 50 mA (0 VDC = TK fault; 12 VDC =
normal operation)
V/C Input U: 0—10 VDC
ATTENTION e total output current for both outputs (+12V and +V) must not exceed
100 mA!

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STVS1 230 VAC TRANSFORMER CONTROLLER WITH
ANALOGUE INPUT
MOUNTING INSTRUCTIONS IN STEPS
Before you start mounting the STVS1, 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 wires that connect the
front cover 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.
3.3 If maximum ambient temperature cannot be adhered to, please provide
extra forced ventilation / cooling.
Not respecting the abovelisted rules can reduce service life and relieves the
manufacturer of any responsibilities.
For metal enclosures (above 7.5 A)
4. Once secured in position, the mounting screws or bolts should be sealed to
maintain the IP rating of the enclosure.
5. Because the controller enclosure is made of metal, it must be earthed and bonded
Fig. 1 Mounting dimensions Fig. 2 Mounting position
A
C
B
A
C
B
E
D
Article code A
[mm] B [mm] C [mm] D [mm] E [mm]
STVS1-15L22 200 305 140 183 236
STVS1-25L22 200 305 140 183 236
STVS1-35L22 200 305 140 183 236
STVS1-50L22 200 305 140 183 236
STVS1-75L22 200 305 140 183 236
STVS1100L22 300 325 170 255 255
STVS1130L22 300 325 170 255 255
Correct Incorrect
50 mm50 mm
75 mm
50 mm
Wall
6. 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.
6.1 Connect the power supply line (terminals L, N and Pe);
6.2 Connect the motor(s) (terminals U, N and Pe);
6.3 Connect the 0-10 Volt control signal input (terminals 0V and V/C).

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STVS1 230 VAC TRANSFORMER CONTROLLER WITH
ANALOGUE INPUT
6.4 If applicable, connect the unregulated output (L1 and N). It can be used to
supply a 230 VAC valve, lamp, etc. when the knob is not at ‘0’ position (see
Table 1 below).
6.5 Connect the TK contacts for monitoring of the thermal motor protection
to the motor TK terminals. As standard, there is a bridge between the TK
terminals.
6.6 If applicable, connect the 12 VDC digital output (+V terminal) for fault
indication (0V = TK fault; 12 V = normal operation)
ATTENTION A safety isolator / disconnect switch should be installed on the mains electricity
side of all motor drives.
Fig. 3 Wiring and connections
STVS1xxxL22
Appplication example 1: STVS1 + potentiometer MTP-X10K-NA
IN
230 VAC
OUT
230 VAC
L NPEPEL1
N1 N1 U TK TK
0V +12V +V
V/C
MTP-X10K-NA
Application example 2: STVS1 + sensor (e.g. RCMFF-2R)
MTP-X10K-NA
M
M
M
M
M
M
MT
M
M
M
MT
M
M
M
MT
MT
MT
T
MT
T
MT
T
T
T
T
T
M
M
M
M
MT
M
MT
T
MT
M
M
M
M
M
MT
M
T
T
M
M
M
MT
MT
M
T
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
M
MT
M
MT
M
M
M
M
MT
M
M
M
M
M
T
M
M
M
M
M
M
T
T
T
M
M
M
M
M
M
T
MT
M
M
M
MT
MT
T
M
M
M
MT
T
MT
M
M
T
P
P
P-
P-
P-
P
P
P
P
P
P-
P-
P-
P-
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P
P-
P-
-
P-
P
X1
X1
X1
X1
X1
X1
X1
X1
X1
1
1
1
1
X1
X1
1
X1
1
1
1
X
1
1
1
1
1
1
1
X
X
X
X
X
X
X
1
1
X1
X
X
X
X1
X1
1
X1
X1
X1
X1
X1
1
1
X1
0
0K
0
0
0K
0K
0
0K
0K
0
0
0
K
K
K
K
K
K
K
K
K
K
K
K
K
0K
K
0K
0K
0
0
0
0K
K
K
K
K
K
K
K
K
K
0K
K
K
0K
0K
0
0
0
0
0K
K
K
K
K
K
K
K
K
0K
0
0
0
0
0
0
0K
K
K
K
K
K
K
K
K
0
0
0
0
0
0
0
K
K
K
K
K
K
0K
K
K
K
0K
0
0
0
0
0
0
0
0
0
K
K
K
K
0K
0K
0
0
0
0
0
0
0
0
0
0
0
0
0
K
K
K
K
K
0K
0K
0K
0
0
0
0
0
K
K
K
K
K
0
0
0
K
K
K
K
0K
0
0
K
K
0
0
0
0K
K
0
0K
0K
0K
0
K
0K
0K
0K
0K
0K
0K0K
K
N
N
-N
N
N
N
N
N
N
-N
N
N
N
-N
N
-N
-
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
N
-N
N
N
N
N
N
N
N
N
N
N
-N
N
-N
-
-
N
N
N
N
N
N
N
N
N
N
N
N
-
-
-
-
-
-
N
N
N
N
N
N
N
N
N
N
N
N
N
-
-N
N
N
N
N
N
N
N
N
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
IN
230 VAC
OUT
230 VAC
L NPEPEL1
N1 N1 U TK TK
0V +12V +V
V/C
Make sure the connections are correct before you power the unit.
ATTENTION
7. Close the cover and secure it with the screws.
8. Turn the knob at ‘0’.
9. Tighten the cable glands.
10. Switch on the mains supply.
11. e controller needs to be switched via the external device providing analogue
input signal
12. Make sure the transformer controller can operate normally (consider an isolating

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STVS1 230 VAC TRANSFORMER CONTROLLER WITH
ANALOGUE INPUT
switch).
13. Operate the controller via the external device output voltages.
Optional settings
e standard configuration of the output voltages is as indicated in Table 1 below.
However, because more than 5 output voltages are available, it is possible to adjust
the 5 steps by changing the internal wiring.
Voltage
0—10 VDC
or external
potentiometer
positions (MTV or
MTP)*
0 VDC - 2 VDC 4 VDC 6 VDC 8 VDC 9.5 VDC
Wires -
Regulated output [VAC]
Voltages*** 080** 110 140 170 190 230
Unregulated output [VAC]
L1 0230 230 230 230 230 230
*See also the operational diagram on page 5 for the corresponding voltages.
** Available but not connected.
If more than 5 output voltages are available, it is possible to adjust the 5 steps by changing the internal wiring .
VERIFICATION OF INSTALLATION
ATTENTION Use only tools and equipment with non-conducting handles when working on
electrical devices.
After connecting the unit to the mains supply, the green LED on its cover should light
up to indicate that the controller is supplied.
Safe operation depends on proper installation. Before start up, ensure the following:
■e mains supply is connected correctly.
■Protection is provided against electrical shock.
■e cables are the appropriate size and fuse-protected.
■ere is sufficient air flow around the unit.
e controller is equipped with TK terminals to connect to the thermal contact
integrated in the motor. When actuated (in case of an overheated motor), the
thermal contact cuts the voltage supply to the motor and switches on the red LED
to indicate that it does not work.
ATTENTION e unit is supplied with electrical energy at voltages high enough to inflict personal
injury or threat to health. Take the relevant safety measures.
ATTENTION Disconnect and confirm that there is no live current flowing to the unit before servicing.
ATTENTION Avoid exposing the controller to direct sunlight!

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STVS1 230 VAC TRANSFORMER CONTROLLER WITH
ANALOGUE INPUT
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.