Lindab UltraLink FTCU Manual

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Technical information
LindabUltraLink®Controller
FTCU

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Introduction
UltraLink®FTCU is a highly accurate flow controller, which measures the flow with
an angled ultrasonic beam which can be calculated and compensated to a very high
accuracy over the whole flow range. The method is very stable over time due to that
it is not sensitive to dirt and the design minimizes the dust accumulation on the flow
sensors.
An increased focus on energy saving has led to ventilation systems requiring low min-
imum flows. The low flows are a problem since they are very difficult to measure and it
is makes it difficult to control the ventilation system.
The new technology of UltraLink®makes it possible to measure lower air flows com-
pared to today’s products while maintaining measurement accuracy. This offers great
advantages for the user in terms of comfort and savings in energy consumption, which
is of great interest.
Content
Introduction .................................................................................................... 2
Overview ........................................................................................................ 3
Description .....................................................................................................3
Planning..........................................................................................................4
Mounting ........................................................................................................6
Connections ................................................................................................... 6
Power supply.................................................................................................. 8
Display............................................................................................................ 9
PIN-code ........................................................................................................ 9
Settings ........................................................................................................ 10
ID-numbers .................................................................................................. 14
Troubleshooting ........................................................................................... 14
Maintenance................................................................................................. 14
Technical data .............................................................................................. 15
Airflows......................................................................................................... 15
Appendix A – Modbus register .................................................................... 16

3
IP42
Status Airflow
m³/h l/s m/s °C % -Actual value
m³/h l/s m/sSetpoint - -
Lindab UltraLink
Controller FTCU
Airflow
IP42
Patented
Status
m³/h
l/s m/s
°C
Mode
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Description
Application
The Controller is suitable for measuring and controlling
air flow and measuring temperature. Communication is
established with analog or digital signals using Modbus.
Design
The Controller consists of a sensor body attached to a
damper body with Lindab Safe gaskets. You are not
allowed to make any changes or adjustment to the
motor or its end-stops!
Two flow sensors are mounted on the sensor body and
connected to a display unit. The display unit is mounted
on top of a shelf on the damper body. The sensor and
damper bodies can rotate relative to each other. This
means that the sensors can be optimally positioned
independently of the desired position of the display and
damper body. Positioning the sensor body correctly after
a disturbance is crucial for the measurement accuracy,
see page 4 for directions on how to mount the Controller
for optimal performance.
For FTCU in dimensions 400 — 630, a flange holds the
damper and sensor bodies together, the flange must be
loosened by unscrewing a nut in order to rotate them. The
nut of the flange on the FTCU dimension 400 is 10 mm
and the nut on the FTCU dimension 500 — 630 is 13 mm.
Note! The flow sensors are placed at a fixed distance
to each other and they shall never be removed and
not used as handles when turning the sensor body.
Overview
Display unit
Status light
CE-mark
IP classification
Air flow direction
Mode button
Display parameters
Damper body
Display unit
Sensor body
Flow sensor
Air flow
direction
RTU
TCP/IP
Flange
Dimension 100 - 315 Dimension 400 - 630
Bluetooth®
logotype
QR code

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Planning
The longer distance to disturbance, i.e. the longer straight duct before the
Controller, the higher the measurement accuracy will be. However this is not
the only factor which affects the accuracy of the measurement. The rotation
of the sensor body and hence the positioning of the first flow sensor ( in the
direction of the air flow) has an impact on the uncertainty of the measure-
ment. It is not recommended to mount the Controller so that the first flow
sensor (*) is placed on an outer radius of a fitting, see table below.
For example: in the case of the bend in the table below, by rotating the
sensor body to position the first sensor according to the first picture (with
the first flow sensor on the inner radius of the bend), the Controller can
be placed at the distance of two duct diameters from the disturbance to
achieve 5 % uncertainty. Positioning the sensor body according to the
second picture (with the first sensor on the outer radius of the bend), the
Controller must be mounted five duct diameters from the disturbance to
achieve the same level of uncertainty.
Never use an UltraLink®on the outlet side of a duct fan. Place it on the inlet side or in worst case use a flow conditioner if
it must be placed on the outlet side.
Disturbance *Placement of first flow sensor
Measurement uncertainty
± % or X l/s depending wich
is the greatest of percentage
or the absolute value for the
specific product size, see
table “Technical data” on
page 15.
a
2-4·Ød >4-5·Ød >5·Ød
Bend
a
Ød
*
Inner radius 5 5 5
Bend
a
Ød
*
Outer radius
(Not recommended) 20 10 5
Bend
a
Ød
*
a
Ød
*
Side 10 5 5

5
We reserve the right to make changes without prior notice
Disturbance *Placement of first flow sensor
Measurement uncertainty
± % or X l/s depending wich
is the greatest of percentage
or the absolute value for the
specific product size, see
table “Technical data” on
page 15.
a
2-4·Ød >4-5·Ød >5·Ød
Reducer
a
Ød
*
Duct diameter
decrease 5 5 5
Reducer
a
Ød
*
Duct diameter increase 10 5 5
T-piece
a
Ød
*
Inner radius 10 5 5
T-piece
a
Ød
*
Outer radius
(Not recommended) 20 10 5
T-piece
a
Ød
*
Side 10 5 5
a
Ød
*

6
24V +B
-A SH
GND
GND
GND
AO1
AO2
AIN MO1
MO2
1234 5 678910 11 12
SCL SDA GND 3V3
1615
14
13
We reserve the right to make changes without prior notice We reserve the right to make changes without prior notice
Mounting
Mount the Controller into the air duct system according to
the mounting instructions for Lindab Safe. Do not use the
flow sensors as handles when you mount the Control-
ler since this may cause damaged and changes in their
positions might influence the measurement accuracy.
Make sure the airflow arrow is pointing in the direction
of the airflow.
Position the damper body so that the display is visible from
some direction. For future connections it is important that
the screws on the lid of the display can be removed.
Note the ID-number of the Controller. The ID can be found
on the label of the box it was delivered in or on the label on
the Controller itself and are the three last numbers of the
serial no.
Rotate the senor body to the correct position according to
the chapter “Planning”, when it is positioned accurately it
should be fixed with screws to the damper body in the same
way as when you connect ducts and fittings. Controllers of
sizes 400 — 630 has a flange which needs to be loosened
by unscrewing a nut. This nut is 10 mm for dimension 400
Connections
Connect the Controller to a remote terminal unit using RS485 or analog terminals. Connections are made in the terminal
board which can be accessed when the lid of the display unit is removed. In the back of the lid there is a picture with a list
of the terminals.
1. 24V, power supply (AC G, DC +) *
2. GND, power supply (AC G0, DC -) *
3. +B, connection for Modbus via RS485
4. -A, connection for Modbus via RS485
5. SH, shield
6. GND, ground (system neutral)
7. AO1, analog output
8. AO2, analog output
9. AIN, analog input
10. MO1, connection for motor
11. MO2, connection for motor
12. GND, ground (system neutral)
13. SCL, not used
14. SDA, not used
15. GND, ground (system neutral)
16. 3V3, not used (in case of biasing)
*) When using AC terminal 1 (G) should have system potential and terminal 2 (G0) should be system neutral.
Recommendations for wiring:
Function Cable type
24 V Supply 2-wire, thickness depending on length and load, max. 1,5 mm²
RS485 2-wire shielded twisted pair, min. 0,1 mm² (LIYCY cable)
Supply the Controller with power from a transformer.
and 13 mm for 500 — 630. By loosening the nut the sensor body can be turned into the desired position. Once this is
achieved, the flange must be fastened by tightening the nut.
To be able to connect cords to the terminal board the rubber cable grommet on the backside of the display unit must be
punctured, preferably using an awl or something pointy to ensure tightness to the environment. When the cords have
been connected they must be strain relieved. The cords can be attached to the shelf by using cable ties that are attached
around cut outs in the shelf.
The display unit and actuator is mounted to enable the Controller to be insulated up to 50 mm.
You must under no circumstances make any holes or connect anything with screws to the sensor body since this will
have an impact on measurement accuracy!

7
BA
+B -A +B -A +B -A
+B
-A
SH SH SH SH
GND
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Digital connection
Connect A on the RTU to -A on the display unit and B to +B. When connecting more than one Controller in series it is
important to keep connecting -A to -A and +B to +B since crossing them will stop Modbus from working. The shield in the
RS485 cable should be connected to ground at the transformer and then continuously connect to ”SH” on all the UltraL-
inks that are powered from that transformer. If more than one transformer is used on the bus, the shield is broken at each
transformer so ”SH” on every product only has connection to ground at the transformer from which its power is supplied.
It is recommended to use RS485 cables with twisted pairs and shield, do not supply power in the same cable unless the
cable is produced for that purpose.
Analog connection
When connecting the Controller using analog signals, it is important to connect the analog out signals on the Controller
(AO1, AO2) to the analog in terminals on the RTU and the analog in signal (AIN) is connected to the analog out terminal on
the RTU. Also make sure to connect the cables to the same analog ground.
Bluetooth®connection
If the product is equipped with Bluetooth (the Bluetooth logotype is printed on the display unit), wireless communication
with the UltraLink can be established. Using a smartphone or tablet with the Lindab UltraLink App, nearby UltraLinks
can be identified. It is then possible to connect to one unit and view information regarding that UltraLink, such as active
measurements and settings.
Mobile app
The app “UltraLink” is available on both Android and iOS, it’s free to download
from Google Play or App store. Like the PC configuration tool, all settings can
be changed via the app. This means all settings can be individually chosen for
the specific building, it is therefore necessary to protect the unit with the PIN
code in the UltraLink menu. For a discription on how this is done, see page 9.
Repeater
If the bus is longer than 300 meters or if there are more than 30 devices, the
system might need an RS485 repeater (FDS-R, see picture to the right) to be
able to communicate in an efficient way.
Biasing
The master on the bus must have biasing on -A and +B. This is more or less standard on BMS-controllers, but if commu-
nication should be established with a conventional computer using a RS485-USB converter, then it is important to make
sure that the converter has a bias circuit. If communication fails and you are uncertain about existance of biasing, you can
add biasing resistors in the screw terminal on one of the UltraLinks to see if this is the cause of the communication failure.
Use 500 - 1000 Ω resistors and connect one resis-
tor from -A to GND and one from +B to the 3V3
terminal. It is also recommendedto add a 120 Ω
termination resistor between -A and +B on the last
UltraLink on the bus to avoid signal reflections.

8We reserve the right to make changes without prior notice We reserve the right to make changes without prior notice
0,7
0,6
0,8
0,9
1
1,1
1,2
1,3
1,4
1,5
Wire cross section Area [ mm2 ]
0
0,1
0,2
0,3
0,4
0,5
0,20
0,15
0,100,050
Copper Resistance [ Ω/m ]
Power supply
Transformer sizing
The needed size of 24 V AC transformer(s) can be defined
by adding up the dimensioning power consumption [VA]
of all the components. The transformer power must
exceed this. Use only safety isolating transformers. Cal-
culation of the current demand I:
I = (P1+P2+…+Pn) / U [A]
where:
Pnis the dimensioned power consumption for each com-
ponent [VA] U is the voltage (24) [V].
If the current demand I exceeds 6 A ( which corresponds
to approximately 150 VA for a 24 V AC transformer ), it is
necessary to use more transformers to prevent overheat-
ing.
Supply cable sizing
The wire size of the supply cable can be determined by
calculating the resistance per meter R. The calculation
presupposes that a voltage drop of e.g. 2 V is accepted in
the supply cable:
R(per m) = Udrop / (I × L) [Ω/m]
where:
Udrop is the accepted voltage drop (2 V) in the cable [V] I is
the current [A]
L is the longest distance of supply cables from trans-
former to a component [m]
Power consumption
The power consumption for dimensioning supply cables
for an UltraLink®Controller is dependant on the size of
the product. On page 15 in the table: “Technical data”, the
power consumptions of different products are listed.
It is not recommended to use a transformer with a
higher capacity than 150 VA!
Example:
Udrop = 2 V, I = 4 A, L = 20 m
R (per m) = 2V / (4A × 20 m) = 0,025 Ω/m
In the diagram a Wire cross section Area of 0,7 mm² can
be read.
Wire cross section area as a function of resistance per m for copper wire

9
IP42
Status Airflow
m³/h l/s m/s °C % -Actual value
m³/h l/s m/sSetpoint - -
Lindab UltraLink
Controller FTCU
We reserve the right to make changes without prior notice
Display
The display can show useful information both with the
diode flashing in green (status light) and with parameters
in the LCD. If the product is equipped with Bluetooth, then
the diode will also flash in blue every three seconds. If
a device has been connected to the UltraLink via Blue-
tooth, then the diode will flash in blue every other second.
By short pressing the mode button you can change the
displayed parameter. If the button is pressed for more
than 5 seconds (long press) then the configuration menu
will be visible. The arrow at the bottom of the display
indicates the current parameter type and unit.
For a detailed description on configurating the UltraLink
using the mode button on the display, see page 13.
Parameter structure
The information menu is visible in the display as soon as the device is powered and by default the air flow in m³/h is
shown.
You can toggle between the different parameters in the menu by short pressing the Mode button. The arrows at the
bottom of the menu indicates if the visible value is an actual reading or a set point and also what unit the current value
has (if any). The following list of parameters are available;
• Actual air flow (m³/h)
• Actual air flow (l/s)
• Actual air velocity (m/s)
• Actual Temperature (°C)
• Damper position (%, 100% = fully open)
• Current set point (m³/h)
• Current set point (l/s)
• Current set point (m/s)
• Controller’s ID number
• Flow rate set point max *)
• Flow rate set point min *)
*) Only visible if analog control (register 4×071=1) and if the control variable is flow rate (4×070=2). If max and min values
are the same the product is working as a constant flow regulator with set point according to that value.
Status light
The green status light indicates:
Mode Function
No light Controller is turned off
Slow flashing light Motor is regulating
Fast flashing light A problem has occurred, error code will be visible in display
Constant light Controller is turned on and functioning as normal
PIN code
UltraLink with Bluetooth must be protected againt unauthorized access by PIN-code, which has to be stated before
changes to the settings can be made. It is important to choose and change the code that the product is delivered with
(1111), to ensure that no unauthorized changes are made. The Bluetooth radio can be disabled by setting register 4×007
to 0.
The code can be changed in three ways:
• using the configuration menu in the display, see page 13 for instructions.
• connecting a PC via Modbus and using the “Configuration Tool” software.
• connect a Bluetooth device and use the “UltraLink” application.

10 We reserve the right to make changes without prior notice We reserve the right to make changes without prior notice
Settings
All available settings are presented in the appendix. The settings can be changed via the RS485 bus and can be done
from any device and configuration that can communicate using Modbus, but preferably the UltraLink®Configuration tool
(See separate documentation). If the products is equipped with Bluetooth the settings can be changed with an app, which
can downloaded from Google Play or App Store. Instructions for the most common settings are described below. For
more register details see appendix.
Digital communication settings
Registers 4x001-4x009 are used to configure communication settings. When initializing contact for the first time the
default settings will be active;
Modbus id: Last three digits in the serial number (also visible in the display if the product has power)
Baud rate: 19200
Parity: Odd
Stop bits: 1
After updating any of the communication parameters the product needs to be power cycled for the changes to take
effect.
If communication fails with the default parameters selected in the UltraLink®configuration tool, then the communication
settings on the Controller might have been changed previously. Verify the settings in the display (See page 9 for instruc-
tions)
Control settings
The Controller can be read and controlled in several different ways. Primarily you need to set the following registers to
determine what variable you will use to control the device and if the control signal comes analog or via bus;
1. Configure register 4×070 for what kind of set point you will control the device with (0 = no control, 1 = damper position, 2
= flow rate)
2. Configure register 4×071 for either bus or analog control of set points (0 = bus, 1 = analog)
3. During operation set points can be applied using registers 4x302 (damper position) and 4 × 314 (flow) depending on the
setting from point 1 above. The set point for damper position has predefined limits 0–100%, where 0% means fully closed
and 100% means fully open. The limits for flow has default values according to the table below but can be modified using
registers 4 × 315 and 4 × 316. The default maximum values corresponds to the upper limit where accuracy is guaranteed.
The value can be set higher, but this may cause worse accuracy of the readings.
Default values for the relevant registers are according to the table below. (Default values for flow max corresponds to 15
m/s).
Size Ø
[mm]
4×314
Flow Set Point
[l/s]
4×315
Flow Set Point
Minimum
[l/s]
4×316
Flow Set Point
Maximum
[l/s]
4×070
Damper
Regulation
Conf.
4×071
Damper
Input
Conf.
100 24 0118
2 (Flow) 1 (Analog)
125 37 0184
160 60 0302
200 94 0471
250 147 0736
315 234 01169
400 377 01885
500 589 02945
630 935 04676
PLEASE LOOK IN THE APPENDED MODBUS REGISTER FOR INSTRUCTIONS ON HOW TO CHANGE REGISTER