Lindab UltraLink FTCU Manual

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Technical information
LindabUltraLink®Controller
FTCU

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Lindab reserves the right to make changes without prior notice
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UltraLink®Controller FTCU
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Introduction
UltraLink FTCU is a highly accurate airflow controller. It measures the airflow with ultra sound and can be calculated and
compensated to a very high accuracy within the whole airflow range. The method is very stable over time due to its design,
which minimizes the contamination of the airflow sensors.
UltraLink FTCU has the possibillity to give you the benefits of a modern demand controlled ventilation system with only a
couple of UltraLinks together with bluetooth sensors installed in your existing ventilation system. It offers great advantages in
terms of comfort and savings in energy consumption.
© 11.2023 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).
Content
Introduction .................................................................................................... 2
Overview ........................................................................................................4
Application ................................................................................................4
Design .......................................................................................................4
Display unit................................................................................................4
Dimension 100 - 315 .................................................................................4
Dimension 400 - 630.................................................................................4
Mounting ........................................................................................................5
Please note................................................................................................5
Planning ....................................................................................................6
Table of mounting distance to disturbance ..............................................6
Electrical installation ......................................................................................8
Before starting ..........................................................................................8
Option A: Connect to premounted cable.................................................. 9
Option B: Circuit board screw terminals................................................... 9
General information (option A and B)........................................................9
Analog connection .................................................................................... 9
Digital connection (Modbus)................................................................... 10
Connecting shield ................................................................................... 10
Biasing .................................................................................................... 10
Repeater.................................................................................................. 10
Power supply........................................................................................... 11
Power consumption ................................................................................ 11
Commissioning ........................................................................................... 12

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UltraLink®Controller FTCU
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Demand controlled room regulation via UltraLink ....................................... 12
Lindab Ultra BT™ Room Control System
(Installation of wireless sensors) ............................................................. 12
Additional heating and cooling via analog signal ................................... 12
Display.......................................................................................................... 13
Status light ................................................................................................... 13
Parameter structure ..................................................................................... 13
Correcting flow measurement for
installation close to disturbance .................................................................. 14
ID-numbers .................................................................................................. 14
PIN code....................................................................................................... 14
Settings for override..................................................................................... 14
Override function by bus......................................................................... 14
Analog override function......................................................................... 14
Firmware update .......................................................................................... 14
How to upgrade your firmware ............................................................... 14
Maintenance................................................................................................. 14
Configuration menu structure ...................................................................... 15
Digital communication settings.................................................................... 16
Control settings....................................................................................... 16
Analog communication settings .................................................................. 17
Analog in settings via modbus................................................................ 17
Analog out settings via modbus ............................................................. 18
Troubleshooting ........................................................................................... 19
If digital communication fails, please verify the following before
contacting support.................................................................................. 19
If analog signals fails, make sure to doublecheck the following ............ 19
Problems accessing UltraLink via Bluetooth .......................................... 19
I cannot find the sensor model I’m trying to pair .................................... 19
Error codes.............................................................................................. 19
Technical data .............................................................................................. 20
Technical data table ................................................................................ 20
Airflows ................................................................................................... 21
Appendix A – Modbus register .................................................................... 21

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Lindab reserves the right to make changes without prior notice
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Lindab reserves the right to make changes without prior notice
2023-11-30
UltraLink®Controller FTCU
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Overview
Application
The FTCU is suitable for measuring and controlling air flow
and measuring temperature. Communication is established
with analog and/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 6-7 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.
Dimension 100 - 315
Flange
Transducer covers
Dimension 400 - 630
Status light
Display parameters
Display unit
CE-mark
IP classification
Air flow direction
Mode button
Bluetooth®
logotype
QR code
Display unit
Damper body
Sensor body
Transducer
Premounted cable

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UltraLink®Controller FTCU
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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.
Airflow
direction arrow
• Rotate the senor body to the correct position according to “Table of mounting distance to disturbance” on page 6-7.
• 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 FTCU 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 simi-
lar.
Motor override
button
Damper shaft
Mounting

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UltraLink®Controller FTCU
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Table of mounting distance to disturbance
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
“Technical data” on page 20
Mounting
directly
onto fitting
without
distance
possible
a
2-4·Ød >4-5·Ød >5·Ød
Bend 90°
a
Ød *
Inner radius
(Best position) 5 5 5 Yes
Bend 90°
a
Ød
*Outer radius
(Not
recom-
mended)
20 10 5 -
Planning
The accuarcy of the measurement is dependent upon mainly two things;
• distance to disturbance (the longer distance to disturbance, the higher the measurement accuracy will be)
• and the positioning of the transducers (FTCU is to be mounted with the first transducer (*) placed at the inner radius of a
fitting)
Below you can see the impact of various disturbances and placements of the transducers.
The FTCU can be placed at the distance of two duct diameter (Ød) from the disturbance to achieve
the specified uncertainty in the table below. In some cases you can mount the FTCU directly onto a
fitting and still have the same measurement accuracy. In those cases you need to make corrections
inside OneLink app. In the table below you can see what scenarios are applicaple.
Other obstructions such as axial fans, silencer baffels or cleaning hatches etc. are not allowed
before the UltraLink (in the direction of the airflow). If a cleaning hatch is required, it must be placed
after the UltraLink (in the direction of the airflow). All these cause turbulences, which will result in
airflow measurement errors.
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®
• To avoid issues with measurement accuracy due to air turbulence:
Make sure you never install a measurement unit after (in airflow direction)
two disturbance fittings (refering to number 1 and 2) where those two fit-
tings are installed in two different levels and the airflow also turnes in cross
direction. (Refering to number 3)
Not following these rules the measurement might not be accurate due to air
turbulance.
Where non-optimal installation situations appear, or several successive
disturbance faults may exist, please contact Lindab sales for consulting.
3
2
1
Airflow direction

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UltraLink®Controller FTCU
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Table of mounting distance to disturbance
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
“Technical data” on page 20
Mounting
directly
onto fitting
without
distance
possible
a
2-4·Ød >4-5·Ød >5·Ød
Bend 90°
a
Ød
*
a
Ød
*Side 10 5 5 -
Reducer
a
Ød
*
Duct diameter
decrease 5 5 5 Yes
Reducer
a
Ød
*
Duct diameter
increase 10 5 5 Yes
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

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
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UltraLink®Controller FTCU
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Electrical installation
Before starting
• You must under no circumstances make any holes or connect anything with screws to the
body of the FTCU.
• The shelf, FTES, can be used for mounting equipment such as an electrical junction box or
a Regula Combi.
• 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 possible
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 on PCB >>
• To access the terminals on the circuit board, remove
the lid by pushing the two heels on the side of the
blue box.
• 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 must
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

9
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
GND
Analog
signals {AO1
AO2
AIN
{
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UltraLink®Controller FTCU
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Option B: Circuit board screw terminals
Connections are made on 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. Connect
power and signal cables in the junction box according to the color scheme
on the label 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 cable 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

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UltraLink®Controller FTCU
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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.
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 existence 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.
BA
+B -A +B -A +B -A +B -A
GNDGND GNDGND
Signal ground
Shield ground