Lindab UltraLink FTCU Manual

lindab | we simplify construction
© 08.2020 Lindab Ventilation. All forms of reproduction without written permission are forbidden. is the registered trademark of Lindab AB.
Lindab's products, systems, product and product group designations are protected by intellectual property rights (IPR).
Technical information
LindabUltraLink®Controller
FTCU

2Lindab reserves the right to make changes without prior notice
2020-08-05
Lindab reserves the right to make changes without prior notice
2020-08-05
Lindab reserves the right to make changes without prior notice
2020-08-05
UltraLink Controller FTCU
lindab | we simplify construction
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
Mounting ........................................................................................................4
Electrical installation ......................................................................................7
Commissioning ............................................................................................ 11
Digital communication settings.................................................................... 15
Analog communication settings .................................................................. 16
Troubleshooting ........................................................................................... 18
Technical data .............................................................................................. 19
Appendix A – Modbus register ....................................................................20

3
IP42
Status Airflow
m³/h l/s m/s °C % -Actual value
m³/h l/s m/sSetpoint - -
Lindab UltraLink
Controller FTCU
Lindab reserves the right to make changes without prior notice
2020-08-05
UltraLink Controller FTCU
lindab | we simplify construction
Lindab reserves the right to make changes without prior notice
2020-08-05
Overview
Application
The FTCU is suitable for measuring and controlling air flow
and measuring temperature. Communication is established
with analog or digital signals using Modbus.
Design
The FTCU consists of a sensor body attached to a damper
body with Lindab Safe gaskets.
The display unit and actuator are mounted on a cup to
enable the FTCU to be insulated up to 50 mm.
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. Position-
ing the sensor body correctly after a disturbance is crucial
for the measurement accuracy, see page 4 for directions on
how to mount the FTCU 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.
Damper body
Display unit
Sensor body
Transducer
Dimension 100 - 315
Flange
Dimension 400 - 630
Status light
Display parameters
Display unit
CE-mark
IP classification
Air flow direction
Mode button
Bluetooth®
logotype
QR code

4Lindab reserves the right to make changes without prior notice
2020-08-05
Lindab reserves the right to make changes without prior notice
2020-08-05
UltraLink Controller FTCU
lindab | we simplify construction
Please note:
• Do not remove the transducers!
• Do not use transducers as handles when you mount the FTCU since this
may cause damage!
Transducers
• Make sure the airflow arrow is pointing in the direction of the airflow.
IP42
Status
Airflow
m³/h l/s m/s °C
Lindab UltraLink
Monitor FTMU
Airflow
direction arrow
• Rotate the senor body to the correct position according to next page.
• On FTCU’s sizes 400 — 630 loosen the nut so the sensor body can be
turned into the desired position. The flange must then be fastened by tight-
ening the nut.
Flange
• Position the display so it is visible from a suitable direction.
• Mount the FTCU into the air duct system according to the mounting
instructions for Lindab Safe.
• When the FTMU is positioned accurately it should be fixed with screws to
the damper body in the same way as when you connect ducts and fittings.
• Never use a FTCU 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.
• The longer distance to disturbance, i.e. the longer straight duct before the
UltraLink®, the higher the measurement accuracy will be.
Duct fan
• The motor direction switch must always be set to “1” as supplied.
• You are not allowed to make any changes or adjustment to the motor or its
end-stops!
Motor direction switch
Airflow
direction arrow
• If the damper needs to be turned manually, then press the manual override
button on the motor and turn the damper shaft with a 8 mm wrench or
similar.
Motor override
button
Damper shaft
Mounting

5
Lindab reserves the right to make changes without prior notice
2020-08-05
UltraLink Controller FTCU
lindab | we simplify construction
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 19.
a
2-4·Ød >4-5·Ød >5·Ød
Bend 90°
a
Ød *
Inner radius
(Best position) 5 5 5
Bend 90°
a
Ød
*
Outer radius
(Not
recommended)
20 10 5
Bend 90°
a
Ød
*
a
Ød
*Side 10 5 5
Planning
The longer distance to disturbance, i.e. the longer straight duct before the FTCU, 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 measurement.
It is recommended to mount the FTCU so that the first flow sensor (*) is placed on the inner
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 FTCU can be placed at the distance of two duct diameter (Ød) from the disturbance
to achieve the specified uncertainty. Positioning the sensor body according to the second pic-
ture (with the first sensor on the outer radius of the bend), the FTCU must be mounted five duct
diameters from the disturbance to achieve the same level of uncertainty.
Please note:
• Note the ID-number of the FTCU. The ID is the three last numbers of the
serial number and can be found:
- on the label of the box it was delivered in
- on the label on the FTCU itself
- in the display after pressing the “MODE” button
- in the App when the product is on
Controller FTCU Ø125
Serial no. 132600052
UltraLink
Lindab®

6Lindab reserves the right to make changes without prior notice
2020-08-05
Lindab reserves the right to make changes without prior notice
2020-08-05
UltraLink Controller FTCU
lindab | we simplify construction
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 19.
a
2-4·Ød >4-5·Ød >5·Ød
Reducer
a
Ød
*
Duct diameter
decrease 555
Reducer
a
Ød
*
Duct diameter
increase 10 5 5
T-piece
a
Ød
*
Inner radius
(Best position) 10 5 5
T-piece a
Ød
*
Outer radius
(Not recom-
mended)
20 10 5
T-piece
a
Ød
*
Side 10 5 5
a
Ød
*

7
24V +B
-A SH
GND
GND
GND
AO1
AO2
AIN MO1
MO2
1234 5 678910 11 12
SCL SDA GND 3V3
1615
14
13
Lindab reserves the right to make changes without prior notice
2020-08-05
UltraLink Controller FTCU
lindab | we simplify construction
Electrical installation
Please note:
• You must under no circumstances make any holes or connect anything with screws to
the body of the FTCU.
• In case electrical installation equipment such as a junction box is needed for installation,
the FTES is a Lindab accessory which can be mounted on the FTCU without causing
damage to the FTCU.
• Never remove the blue electronics box.
• Never remove the transducers.
Use the premounted cable >>
• Connect power and communication cables to the
premounted cable.
• Check the label on cable for reference to cable
colours.
• It is important that the cable is as short as possi-
ble for optimal Modbus communication.
For cable connections there is two options, use the
premounted cable or connect directly in the PCB
(option A and B):
Connect directly in the PCB >>
• To access the terminals on the circuit board,
remove the four Philips screws in the corners of the
lid and remove the lid.
• 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. Do not remove the blue box to do
this!
• When the cables have been connected they be
strain relieved. The cables can be attached to the
shelf by using cable ties that are attached around
cut outs in the shelf.
Option A
Option B

8
24V +B
-A SH
GND
GND
GND
AO1
AO2
AIN MO1
MO2
1234 5 678910 11 12
SCL SDA GND 3V3
1615
14
13
24V AC/DC {G+
G-
Modbus {+B
-A
Analog
signals {AO1
AO2
AIN
Lindab reserves the right to make changes without prior notice
2020-08-05
Lindab reserves the right to make changes without prior notice
2020-08-05
UltraLink Controller FTCU
lindab | we simplify construction
Option B: Circuit board screw 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) must have system potential and terminal 2 (G0) must be system neutral.
General information (option A and B)
Function Cable type
24 V Supply 2-wire, thickness depending on length and load, max. 1,5 mm²
RS485 Modbus communication 2-wire shielded twisted pair, min. 0,1 mm² (LIYCY cable)
Using other cables for Modbus signals may result in communication problems.
Analog connection
When connecting the FTCU using analog
signals, it is important to connect the
analog out signals on the FTCU (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.
Option A: Connect to premounted cable
Connect the premounted cable in a junction box near the FTCU. Con-
nect power and signal cables in the junction box according to the color
scheme on the lable on the premounted cable, see picture to the right.
When connecting Modbus signal wires, the length of the premounted
cable needs to be as short as possible, since these have a negative
effect on signal quality.
In this case, place junction box as close to the FTCU as possible, then
cut the premounted where it is as short as possible for installation.
Connection of
UltraLink
Note! All cables that are
not connected must be
insulated.
24V Red
GND White
+B Yellow
-A Brown
GND Grey
AO1 Green
AO2 Blue
AIN Pink

9
Lindab reserves the right to make changes without prior notice
2020-08-05
UltraLink Controller FTCU
lindab | we simplify construction
Digital connection (Modbus)
Connect A on the RTU to -A on the display unit and B to +B. When connecting more than one FTCU in series it is
important to keep connecting -A to -A and +B to +B since crossing them will stop Modbus from working. It is recom-
mended 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. When connecting signal ground, attach it to “GND” on the terminal to the right of the
terminal for shield (SH) on the PCB. Then attach it to the corresponding terminal in the RTU.
Connecting shield
The shield in the RS485 cable should be connected to ground at the transformer and then continuously connect to
”SH” on all the UltraLinks 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.
BA
+B -A +B -A +B -A +B -A
GNDGND GNDGND
Signal ground
Shield ground
Biasing
The master on the bus must have biasing on
-A and +B. This is more or less standard on
BMS-controllers, but if communication 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 communi-
cation failure. Use 500 - 1000 Ω resistors and connect one resistor from -A to GND and one from +B to the 3V3 termi-
nal. 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.
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.

10
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 ]
Lindab reserves the right to make changes without prior notice
2020-08-05
Lindab reserves the right to make changes without prior notice
2020-08-05
UltraLink Controller FTCU
lindab | we simplify construction
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. Calculation of the cur-
rent demand I:
I = (P1+P2+…+Pn) / U [A] where: Pnis the dimensioned power consumption for each component [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 neces-
sary to use more transformers to prevent overheating.
Supply cable sizing
The wire size of the supply cable can be determined by calculating the resistance per meter R. The calculation presup-
poses 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 transformer to a component [m]
Wire cross section area as a function of resistance per m for copper wire
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.
Power consumption
The power consumption for dimensioning supply cables for an UltraLink®FTCU is 3-5 VA. See details on page 19.
It is not recommended to use a transformer with a higher capacity than 150 VA.

11
Lindab reserves the right to make changes without prior notice
2020-08-05
UltraLink Controller FTCU
lindab | we simplify construction
Commissioning
Mobile app (recommended)
If the UltraLink is equipped with Bluetooth (the Bluetooth logotype is printed on the
display unit), wireless communication with the UltraLink can be established. Using
a smartphone with the Lindab UltraLink app, nearby UltraLinks will be identified.
Now you can connect to all the different UltraLink units to change settings and view
information regarding each UltraLink. You can find the UltraLink app in both Google
Play and AppStore, free of charge. The settings of all the different UltraLink units can
then easy be changed directly through the app. This means you can have individually
settings chosen for a specific building.
It is therefore necessary to change the PIN code in the UltraLink, for a discription on
how this is done, see page 13.

12
IP42
Status
Airflow
m³/h l/s m/s °C % -
Actual value
m³/h l/s m/s
Setpoint
- -
Lindab UltraLink
Controller FTCU
Lindab reserves the right to make changes without prior notice
2020-08-05
Lindab reserves the right to make changes without prior notice
2020-08-05
UltraLink Controller FTCU
lindab | we simplify construction
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 con-
nected to the UltraLink via Bluetooth, 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 14.
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 the air flow reading,
temperature 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)
• FTCU 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 FTCU is turned off
Flashing light every 3 second Motor is regulating to reach set point
Flashing light every 1 second A problem has occurred, error code will be visible in display
Constant light FTCU is turned on and functioning as normal
The Blue status light indicates:
Mode Function
No light Bluetooth is turned off or the FTCU is not equipped with it.
Flashing light every 3 second Bluetooth is on stand by and is ready to connect to mobile device.
Flashing light every 1 second A mobile device has been connected to the FTCU.

13
Lindab reserves the right to make changes without prior notice
2020-08-05
UltraLink Controller FTCU
lindab | we simplify construction
Correcting flow measurement for installation
close to disturbance
Later UltraLinks have a function to compensate for mount-
ing the product closer to a disturbance, and still have 5%
measurement uncertainty, than what is specified in the
chapter “Mounting”. If it is required to install an UltraL-
ink close to a disturbance, the correction is done via a
function in the UltraLink app. Connect a mobile device to
the UltraLink and tap the “Device” tab, there is a function
which is activated by choosing “Type of disturbance” and
then “Distance to dirsturbance”. After these two inputs
have been made, the function is active and corrects the
flow according to the inputs made.
Controller FTCU Ø125
Serial no. 132600052
UltraLink
Lindab®
ID-numbers
The FTCU is given an
ID-number between 1 to
239 during production.
The given ID-number can
be seen on the label on the outside of the box the FTCU
is delivered in, the ID-number is the same as the three last
digits in the serial number.
If two or more Modbus devices have the same ID-number
it is necessary to apply changes so that each of them get
an unique ID-number to allow communication.
To change the Modbus ID register of an UltraLink®all other
devices with the same ID must be disconnected. It is more
efficient to change the ID in the display under “Con.Set”
(See page 14 for more info). The register for Modbus ID
is a holding register with address 4x001.
PIN code
UltraLink with Bluetooth must be protected againt unau-
thorized 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 deliv-
ered 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 “Configura-
tion Tool” software.
• connect a Bluetooth device and use the “UltraLink”
application.
Maintenance
The FTCU does not normally require any maintenance. The
visible parts of the device can be wiped with a damp cloth.
Settings for override
The FTCU has two different override functions that can
be initiated either over the bus or with analog input (only
in case of input voltage range of 2-10 V or 10-2 V). If
controlled via bus (register 4x071 = 0), then the damper
can be forced (register 4x151) to fully open or fully closed
position, or the flow rate setpoint can be set to minimum
or maximum flow rate setpoint (according to registers
4x315 and 4x316, respectively). If the unit is controlled with
analog input (4x071 = 1), then the damper can be forced
to fully closed position (regardless the settings in register
4x501, which represents the minimum angle (fully closed)
of the damper in normal mode).
Override function by bus:
1. Normal mode, no override (register 4x151 = 0).
2. Go to maximum flow rate setpoint (register 4x151 = 1).
3. Go to minimum flow rate setpoint (register 4x151 = 2).
4. Go to fully open damper position (register 4x151 = 3).
5. Go to fully closed damper position (register 4x151 = 4).
If an override is initiated, it can be restored either manually
by setting register 4x151 to 0, or automatically after the
predefined override timeout in register 4x150.
Analog override function:
In analog mode (4x071 = 1), the override function can only
be called if input voltage range is set to 2-10 V or 10-2 V
(4x500 = 2 or 3, respectively) and the controlled variable is
flow rate (4x070 = 2). If these settings are active, the over-
ride function is set as follows:
1. Normal mode, no override (input voltage ≥ 2 V).
2. Go to fully closed damper position (if input voltage is
lower than the value defined in register 4x511).

14 Lindab reserves the right to make changes without prior notice
2020-08-05
Lindab reserves the right to make changes without prior notice
2020-08-05
Lindab reserves the right to make changes without prior notice
2020-08-05
UltraLink Controller FTCU
lindab | we simplify construction
Configuration menu structure
The configuration menu is activated by long pressing the button (5 sec). After long pressing the button a new menu will
appear with three different options;
• Con.Set (Connection settings)
• AIn.Set (Analog In settings)
• Cancel (Cancel and return to information menu)
You can toggle between the three options by short pressing the button. Select the option you want and long press to pro-
ceed down in the menu structure.
Under Con.Set (connection settings) you can find the following options (toggle with short press, select with long press);
Menu tag Description Options Description
• Pr. Protocol Pr.PAS
Pr.Mod
Pascal protocol
Modbus
• b. Baud rate b.9600
b.19200
b.38400
b.76800
Baud rate 9600
Baud rate 19200
Baud rate 38400
Baud rate 76800
• bit. Stop bits bit.1
bit.2
1 stop bits
2 stop bits
• P. Parity P. o d d
P.e ve n
P.none
Odd parity
Even parity
Parity none
• Id. Modbus Id Id.x Modbus id (x = value) *)
• PLA. PLA address for Pascal PLA.x PLA address (x = value) *)
• ELA. ELA address for Pascal ELA.x ELA address (x = value) *)
• Pi. Pin-code Pi.xxxx D ef au lt: x x x x = 1111
• Cnt. Control by bus Cnt.bus
Cnt.AIn
Control by bus
Control by analog in
• Store Store changes Strores changes on long press
• Cancel Cancel Cancel and ignore changes on long press
Menu tag Description Options Description
• qH. Max flow (l/s) qH.x Maximum air flow (x = value) *)
• qL. Min flow (l/s) qL.x Minimum air flow (x = value) *)
• r. Voltage range r.0-10
r.10 - 0
r.2-10
r.10 - 2
Voltage range 0-10V
Voltage range 10-0V
Voltage range 2-10V
Voltage range 10-2V
• Store Store changes Stores changes on long press
• Cancel Cancel Cancel and ignore changes on long press
Under AIn.Set (analog in settings) you can find the following options (toggle with short press, select with long press).
*) To change the value you need to long press until a blinking cursor appears under the first single number in the current
value. After that you short press to toggle to the desired number, then you long press to move the blinking cursor to the
next single number in the current value. Proceed until the new value has been set and long press to continue.

15
Lindab reserves the right to make changes without prior notice
2020-08-05
UltraLink Controller FTCU
lindab | we simplify construction
Lindab reserves the right to make changes without prior notice
2020-08-05
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
VALUES. SOME VALUES HAS SCALE FACTORS AND SOME VALUES OCCUPY TWO REGISTERS!
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® Con-
figuration tool (See separate documentation). For more register details see appendix.
Digital communication settings
Registers 4x001-4x009 are used to configure communica-
tion 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.
Control settings
The FTCU 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 is analog or digital;
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 Modbus control of set
points with “0” (0 = bus, 1 = analog).
3. During operation set points can be applied using regi-
sters 4x302 (damper position) and 4 × 314 (flow) depen-
ding 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).

16 Lindab reserves the right to make changes without prior notice
2020-08-05
Lindab reserves the right to make changes without prior notice
2020-08-05
UltraLink Controller FTCU
lindab | we simplify construction
Analog communication settings
Analog in settings via modbus
If using analog communication (4×071=1) you need to specify the operational voltage
range and also corresponding max and min values;
1. Configure register 4×500 for analog in level configuration ( (0) 0-10V, (1) 10-0V, (2)
2-10V, (3) 10-2V) if you are using analog control of the set points. (If set points are
controlled via bus this point can be ignored)
2. Configure registers 4×501–504 with relevant data for max and min levels for the
voltage range selected in previous step. Register 4×501–502 are used if the device
is controlled with angle (4×070=1) and registers 4×503–504 are used if the device is
controlled using flow (4×070=2). If set points are controlled via bus this point can be
ignored.
Size Ø
[mm]
4x070
Damper
Regulation
Conf.
4x500
Analog In
Level
config
4x501
Angle Min
[%] *)
4x502
Angle Max
[%] *)
4x503
Flow Min
[l/s]
4x504
Flow Max
[l/s]
100
2 (Flow) 2 (2-10V )
0100 055
125 0100 086
160 0100 0141
200 0100 0220
250 0100 0344
315 0100 0546
400 0100 0880
500 0100 01374
630 0100 02182
*) 0% means fully closed damper position and 100% means fully open damper position.
PLEASE LOOK IN THE APPENDED MODBUS REGISTER FOR INSTRUCTIONS ON HOW TO CHANGE REGISTER
VALUES. SOME VALUES HAS SCALE FACTORS AND SOME VALUES OCCUPY TWO REGISTERS!
Default values for the relevant registers are according to the table below. (Default values for flow max corresponds to 7 m/s).

17
Lindab reserves the right to make changes without prior notice
2020-08-05
UltraLink Controller FTCU
lindab | we simplify construction
Analog out settings via modbus
Analog out is always active but you need to specify what kind of data you want to read on the
two ports;
1. Configure registers 4 × 401 and 4 × 431 for the variables you want to read on the analog out
terminals (0 = Flow, 1 = Temperature, 2 = Damper position).
2. Configure registers 4
× 400 and 4 × 430 for analog out level configuration ( (0) 0-10V, (1) 10-0V,
(2) 2-10V, (3) 10-2V)
3. Configure registers 4
× 401–409 and 4 × 431–439 with relevant data for max and min levels
for the voltage range selected in step 2. You only need to configure the max and min values
corresponding to the variable selected in step 1.
Size Ø
[mm]
4x400
Level
Conf.
4x401
Unit
Conf.
4x402
Temp Min
[°C]
4x403
Temp Max
[°C]
4x404
Flow Min
[l/s]
4x406
Flow Max
[l/s]
4x408
Angle Min
[%] *)
4x409
Angle Max
[%] *)
100
2 (2-10V ) 0 (Flow)
050 055 0100
125 050 086 0100
160 050 0141 0100
200 050 0220 0100
250 050 0344 0100
315 050 0546 0100
400 050 0880 0100
500 050 01374 0100
630 050 02182 0100
*) 0% means fully closed damper position and 100% means fully open damper position.
Size Ø
[mm]
4x430
Level
Config
4x431
Unit
Conf.
4x432
Temp Min
[°C]
4x433
Temp Max
[°C]
4x434
Flow Min
[l/s]
4x436
Flow Max
[l/s]
4x438
Angle Min
[%] *)
4x439
Angle Max
[%] *)
100
2 (2-10V ) 2 (Angle)
050 055 0100
125 050 086 0100
160 050 0141 0100
200 050 0220 0100
250 050 0344 0100
315 050 0546 0100
400 050 0880 0100
500 050 01374 0100
630 050 02182 0100
Default values for the relevant registers related to “Analog Out 2” are according to the table below (Default values for flow
max corresponds to 7 m/s).
PLEASE LOOK IN THE APPENDED MODBUS REGISTER FOR INSTRUCTIONS ON HOW TO CHANGE REGISTER
VALUES. SOME VALUES HAS SCALE FACTORS AND SOME VALUES OCCUPY TWO REGISTERS!
*) 0% means fully closed damper position and 100% means fully open damper position.

18 Lindab reserves the right to make changes without prior notice
2020-08-05
Lindab reserves the right to make changes without prior notice
2020-08-05
Lindab reserves the right to make changes without prior notice
2020-08-05
UltraLink Controller FTCU
lindab | we simplify construction
Error codes
If a problem occurs the status light will start to flash and an
error code will be displayed. Listed in the table below are
their problem and possible solution.
Error code Problem Comment
Err001 Motor not working correctly Check motor cables and connections
Err002 Angle sensor not working correctly Try to recalibrate using UltraLink®Configuration tool
Err003 Flow set point not reached Check if the AHU supplying enough air
Err004 Problems with flow measurement Might be caused by:
• something blocking the flow sensors
• an electronic fault
• the flow sensors are not connected properly into the display
unit
• the sensor body is flawed
Err032 Factory data is corrupted Reset to factory defaults using UltraLink®configuration tool
Airflow
IP42
Patented
Status
m³/h
l/s
m/s
°C
Mode
Monitor FTMU
Troubleshooting
If digital communication fails, please verify the follow-
ing before contacting support:
• Check settings for Baud rate, parity and stop bit and
make sure the master uses the same settings as the
UltraLinks. This can be done with a mobile phone and
the UltraLink app.
• -A and +B are continuously connected between all the
products without any mixups of -A and +B.
• Bus layout is not allowed to be “star connection”.
• The cables for power supply are connected identical
on all products and transformers connecting G to G
(24V) and G0 to G0 (GND).
• The shield is continuous along the bus and grounded
only at the transformer and the last UltraLink on the
bus.
• There are not more than 30 devices on the bus. (Install
a repeater if you have more than 30 devices.)
• The total length of the bus is maximum 300 m. (Install
with a repeater if you have more than 300 m bus cable.)
• Try to establish communication with a PC using Con-
figuration Tool and a biased RS485-USB converter.
• Keep the total length of stubbs (such as the pre-
mounted cable) of a buss with 30 devices, no more
than 20 meters.
If analog signals fails, make sure to doublecheck the
following:
• Measure voltage on the screw terminal, the voltage
should be the same as that on the BMS controller.
• If the voltage is not correct, check that the wire is firmly
attach to the terminal of the UltraLink. If it is not, then
the UltraLink might not be able to pick up the signal.
Problems accessing UltraLink via Bluetooth:
• The UltraLink must have the Bluetooth logotype on
the lid of the display unit in order to have a Bluetooth
function.
• To access the UltraLink via Bluetooth, the correct PIN
code must be input before being able to connect.
Verify with administrator that the PIN code is correct if
you cannot connect.

19
Lindab reserves the right to make changes without prior notice
2020-08-05
UltraLink Controller FTCU
lindab | we simplify construction
Lindab reserves the right to make changes without prior notice
2020-08-05
Technical data
Power supply AC/DC 24 (19—28) V
Cable Max outer diameter 7mm
Power consumption Dim. 100 - 315 2 W
Dim. 400 - 630 3 W
Power consumption For wiring, dim. 100 - 315 3 VA
For wiring, dim. 400 - 630 5 VA
Premounted cable Length 0,7 m
IP class 42
Tightness class to the environment EN 12237 D
Tightness class, past a closed damper EN 1751 4
Pressure class, closed damper Dim. 100 - 315 C (max 5000 Pa)
Dim. 400 - 630 B (max 2500 Pa)
Storage temperature range -30 to +50 °C
Maximum ambient moisture 95 % RH
Connection RS485 standard or analog
Cable RS485 standard cable, 2-wire shielded
twisted pair, min. 0,1 mm² (LIYCY cable)
Protocol Modbus
Output Flow
Flow
Velocity
Temperature
Damper position (0% fully closed, 100%
fully open)
m³/h
l/s
m/s
°C
%
Velocity range For guaranteed measurement uncertainty 0,2 — 15,0 m/s
Measurement uncertainty, flow
(min. 5 diamters of straight duct before the
UltraLink.)
Depending on which is the greatest of the
percentage or the absolute value for the
specific product size.
±5
Dim. 100 = ±1,00
Dim. 125 = ±1,25
Dim. 160 = ±1,60
Dim. 200 = ±2,00
Dim. 250 = ±2,50
Dim. 315 = ±3,15
Dim. 400 = ±4,00
Dim. 500 = ±5,00
Dim. 630 = ±6,30
% or
l/s
l/s
l/s
l/s
l/s
l/s
l/s
l/s
l/s
Temperature range -10 to +50 °C
Measurement uncertainty, temperature ±1 °C
Screws on lid of display unit Philips (PH1) 4pcs
Bluetooth radio Frequency 2402 — 2480 MHz
Output power -40 to +9 dB

20 Lindab reserves the right to make changes without prior notice
2020-08-05
Lindab reserves the right to make changes without prior notice
2020-08-05
UltraLink Controller FTCU
lindab | we simplify construction
Address
UltraLink®
Name Description Data type Unit Div Default Min Max Access FTCU FTMU
INPUT REGISTERS
3x008 X X Product Nominal Size Nominal diameter of duct 16bit mm RO
3x013 X X Unit Status Current unit status:
0 = Normal mode;
1 = Locating flow;
2 = Override control;
3 = Error;
4 = Control loop regulating;
5 = Angle sensor calibrating
16bit RO
Flow info
3x150 X X Velocity in m/s Velocity in m/s Float m/s RO
3x152 X X Air flow in m³/h Air flow in m³/h Float m³/h RO
3x154 X X Air flow in l/s Air flow in l/s Float l/s RO
Appendix A – Modbus register
Address : Modbus register address (3x indicates Input & 4x indicates Holding)
UltraLink®: Type of UltraLink®where the register is available (Indicated by “x”)
Name: Name of register
Description: Short description of register.
Data type: Data type for register (16bit contained in one register, 32bit and float in two consecutive registers).
Unit: Unit for register value (if any).
Div: Scale factor for stored value (divide register value with “div” to get correct value).
Default: Default setting.
Min: Minimum value allowed for the register.
Max: Maximum value allowed for the register.
Access: RO for read only (Input registers) and RW for read and write (Holding registers).
Airflows
Ø [mm]
0,2 m/s 7,0 m/s 15,0 m/s
m³/h l/s m³/h l/s m³/h l/s
100 6 2 198 55 425 118
125 9 3 309 86 662 184
160 14 4507 141 1087 302
200 23 6792 220 1696 471
250 35 10 1237 344 2650 736
315 56 16 1964 546 4208 116 9
400 90 25 3167 880 6786 1885
500 141 39 4948 1374 10603 2945
630 224 62 7855 2182 16833 4676