Carrier TruVu UC253-V Installation manual

TruVu™ UC253-V
Installation and Start-up Guide
©2022 Carrier. All rights reserved. • Catalog No. 11-808-854-01 • 10/24/2022

Verify that you have the most current version of this document from www.hvacpartners.com, the Carrier Partner
Community website, or your local Carrier office.
Important changes are listed in Document revision history at the end of this document.
©2022 Carrier. All rights reserved.

Contents
What is the TV-UC253-V? ............................................................................................................................................ 1
Specifications ........................................................................................................................................................2
Zone sensors .........................................................................................................................................................6
Touchscreen devices ............................................................................................................................................6
To mount the TV-UC253-V ........................................................................................................................................... 7
Wiring for power .......................................................................................................................................................... 8
To wire for power ..................................................................................................................................................8
Addressing the TV-UC253-V through the Service port .............................................................................................. 9
To set the IP address......................................................................................................................................... 11
Addressing a network of controllers using the controller setup Local Network tab ............................................12
Method 1: To address when you know the serial numbers ....................................................................... 12
Method 2: To address when you do not know the serial numbers ............................................................ 13
Wiring for communications ......................................................................................................................................14
Wiring specifications ......................................................................................................................................... 14
To connect the TV-UC253-V to the Ethernet .................................................................................................. 15
Wiring devices to the TV-UC253-V's Rnet port ........................................................................................................16
Wiring devices to the TV-UC253-V's Act Net port ....................................................................................................17
Wiring inputs and outputs.........................................................................................................................................18
Inputs................................................................................................................................................................... 18
Outputs ................................................................................................................................................................ 18
Wiring specifications ......................................................................................................................................... 19
To wire inputs and outputs............................................................................................................................... 20
To adjust input and output properties .....................................................................................................................23
Input values ........................................................................................................................................................ 24
Output values ..................................................................................................................................................... 25
Resolution values .............................................................................................................................................. 26
Offset/Polarity values ....................................................................................................................................... 26
Using the airflow sensor............................................................................................................................................27
To connect duct tubes to the flow sensors .................................................................................................... 27
To set up the Airflow Control microblock ....................................................................................................... 28
Find and upload in the i-Vu® interface ....................................................................................................................29
Adjusting the TV-UC253-V driver properties ............................................................................................................30
Driver ................................................................................................................................................................... 30
Device .................................................................................................................................................................. 32
Notification Classes........................................................................................................................................... 32
Calendars ............................................................................................................................................................ 33
Common Alarms ................................................................................................................................................ 34
Specific Events ................................................................................................................................................... 34
Custom Translation Tables............................................................................................................................... 35
BACnet Controller Properties........................................................................................................................... 35
BACnet Firewall.................................................................................................................................................. 35
Network Diagnostics - Statistics...................................................................................................................... 36
Network Diagnostics - Packet Capture........................................................................................................... 37
Act Net Bus ......................................................................................................................................................... 38
Communication Status ..................................................................................................................................... 40
Flow Calibration Archive ................................................................................................................................... 40
To set up Network Statistic trends.................................................................................................................. 41
To set up the controller through the Service port ...................................................................................................42
ModStat tab ........................................................................................................................................................ 42

Contents
Device tab ........................................................................................................................................................... 43
Ports tab.............................................................................................................................................................. 43
BACnet tab.......................................................................................................................................................... 44
Security tab......................................................................................................................................................... 44
Local Network tab.............................................................................................................................................. 44
To communicate through the BACnet/Service port network.................................................................................48
To communicate locally through the Rnet port.......................................................................................................50
To set up a Local Access connection in the i-Vu® interface ....................................................................... 51
Troubleshooting .........................................................................................................................................................52
LEDs ..................................................................................................................................................................... 52
To configure custom Prog LED ........................................................................................................................ 54
To get a Module Status report ......................................................................................................................... 55
Troubleshooting inputs and outputs ............................................................................................................... 55
To get a Device Log ........................................................................................................................................... 56
To get the TV-UC253-V's serial number.......................................................................................................... 57
To replace the TV-UC253-V's fuse ................................................................................................................... 57
To revert to default settings ............................................................................................................................. 58
To take the TV-UC253-V out of service ........................................................................................................... 59
Compliance ................................................................................................................................................................60
FCC Compliance................................................................................................................................................. 60
CE and UKCA Compliance ................................................................................................................................ 60
Industry Canada Compliance........................................................................................................................... 60
BACnet Compliance........................................................................................................................................... 60
Appendix - Module Status field descriptions ...........................................................................................................61
Document revision history ........................................................................................................................................63

TruVu™ UC253-V ©2022 Carrier.
Installation and Start-up Guide All rights reserved.
1
The TruVu™ Advanced Application Controller (part no. TV-UC253-V):
•Runs one control program
•Supports BACnet/IP communications on the 10/100 Ethernet port as a single node in a daisy-chain
configuration or as part of a network using a ring topology
•Supports DHCP IP addressing
•Has built-in network diagnostic capture functionality for troubleshooting
•Has network statistics that can be viewed numerically or as trend graphs
•Has built-in airflow sensors
•Supports Rnet devices
•Supports Act Net devices
•Works with the i-Vu® v7.0 or later system with the latest cumulative patch
•Works with Field Assistant v7.0 or later with the latest cumulative patch
•Provides 5 universal inputs, 2 binary outputs, 2 analog outputs, and 1 universal output
•The universal output can be configured as binary, analog, or pulse-width modulated analog
What is the TV-UC253-V?

What is the TV-UC253-V?
TruVu™ UC253-V ©2022 Carrier.
Installation and Start-up Guide All rights reserved.
2
You can use the TV-UC253-V's physical communication ports as follows:
Port
Port type
For this type of
communication...
At...
Eth0
Eth1
10/100 Mbps Ethernet
BACnet/IP
BACnet/Ethernet
10 or 100 Mbps
The TV-UC253-V also has the following ports:
•Rnet port for connecting ZS sensors, an Equipment Touch, an TruVu™ ET Display, and Wireless Adapter for
wireless sensors
•Service USB port for connecting locally to controller setup pages, the TruVu™ ET Display, or the Carrier
wireless service adapter
•Comm USB port for other communication options in the future
•Act Net port supports a combination of up to 5 Act Net addresses, as follows:
○Address 1is reserved for the Carrier actuator
○Address 2and 3are reserved for the VAV Zone II Secondary Duct
○Address 4and 5for i-Vu® Smart Valves
Specifications
Driver
drv_fwex_< version >.driverx
Maximum number of control programs*
1
Maximum number of BACnet objects*
12000
Third-party BACnet integration points
NOTE Must be on the BACnet/IP network
100
* Depends on available memory.
Power
24 Vac ±15%, 50–60 Hz, 55 VA
24 Vdc ±10%, 20 W
NOTE The above power consumption is for the controller only. Adding devices to
the Act Net bus increases total power consumed.
Eth0, Eth1
10/100 BaseT, full duplex, Ethernet ports for BACnet/IP and/or BACnet/Ethernet
communication.
Under normal operation, network traffic not destined for this controller is repeated
to the other Ethernet port. When the controller is powered off, all traffic received on
one port is mirrored to the other port.

What is the TV-UC253-V?
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Rnet port
•Supports up to 5 wireless and/or ZS sensors, and one Equipment Touch or
TruVu™ ET Display
•Supplies 12 Vdc/260 mA power to the Rnet across its rated temperature
range.
NOTE Ambient temperature and power source fluctuations exceeding the
listed operating ranges may reduce the power supplied by the Rnet port.
NOTE If the total power required by the sensors on the Rnet exceeds the
power supplied by the Rnet port, use an external power source. The Wireless
Adapter, Equipment Touch, or TruVu™ ET Display must be powered by an
external power source. See the specifications in each device's Installation and
Start-up Guide to determine the power required.
Act Net port
Supports a combination of up to 5 Act Net addresses, as follows:
•Address 1is reserved for the Carrier actuator
•Address 2and 3are reserved for the VAV Zone II Secondary Duct
•Address 4and 5for i-Vu® Smart Valves
Maximum power available for Act Net devices:
•AC supply - 25 VA (1 A)
•DC supply - 15W (0.625A)
•Use an external transformer if your devices exceed the maximum power.
Service port
USB 2.0 host port for setting up the controller and troubleshooting through a local
connection to a computer, connecting to the TruVu™ ET Display, or the Carrier
wireless service adapter.
Comm port
For future use.
Aux 24V+ DC
8 Terminals
Supplies 24Vdc to external I/O devices, max 200mA total (when controller powered
by AC) or max 500mA total (when controller powered by DC)
Universal inputs
5
Inputs are configurable in the control program for 0–5 Vdc, 0–10 Vdc, thermistor,
dry contact, or pulse counter.
Input resolution
12 bit A/D
Input pulse frequency
10 pulses per second. Minimum pulse width (on or off time) required for each
pulse is 50 msec.
24 Vdc terminal
Supplies 24 Vdc to external I/O devices, max 100 mA
Universal output
This output can be set by a DIP switch as an Analog or Binary output.
•In Analog mode, the output can be used for 0-10 Vdc or a 12 Vdc pulse width
modulated (PWM) control signal at a frequency of 80 Hz.
•In Binary mode, the output has a built-in relay and can be used to switch
external devices or relays up to 3.75A, 30 Vac/Vdc.
Analog outputs
2 analog outputs, 0–10 Vdc (10 mA max)

What is the TV-UC253-V?
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Installation and Start-up Guide All rights reserved.
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Binary outputs
One bank of 2 N.O. binary outputs. Each relay contact rated at 3.75 A max. @ 30
Vac/Vdc. Each bank is limited to Class 2 requirements of 100 VA / 4.2 A.
Configured normally open.
See Output values (page 25).
Output resolution
12 bit D/A
Integral airflow sensor
Precision differential pressure sensor 0–2 in. H2O, sensitive down to ±0.001 in.
H2O. Barbed tapered airflow connections accept 3/16 in. (4.75 mm) I.D. tubing.
Allows for readings across the 0–2 in. H2O range, accurate to ±3% of sensor
reading at 2 in. H2O.
Controller microprocessor
32-bit ARM Cortex-A8, 600MHz, processor with multi-level cache memory
Memory
4 GBs eMMC Flash memory and 256 MB DDR3 DRAM (2 MB available).
User data is archived to non-volatile Flash memory when parameters are changed,
every 90 seconds, and when the firmware is deliberately restarted.
NOTE When you change a parameter, you must wait 30 seconds before turning
the power off, in order for the change to be saved.
Real-time clock
Real-time clock keeps track of time in the event of a power failure for up to 3 days.
Protection
A single fast acting, 5mm x 20mm glass fuse for power
The power and network ports comply with the EMC requirements EN50491-5-2.
CAUTION To protect against large electrical surges on serial EIA-485
networks, place a PROT485 at each place wire enters or exits the building.
LED status indicators
See LEDs (page 52) for details.
•Tricolor Net LED to show network status
•Tricolor Sys LED to show controller status
•Tx (Transmit) and Rx (Receive) activity LED and yellow link status LED for the
following ports:
○Ethernet port Eth0
○Ethernet port Eth1
•Output LEDs indicate status of each output.
•Prog LED is customizable.
Environmental operating
range
-4 to 158°F (-20 to 70°C), 10-95% relative humidity, non-condensing
NOTES
•The TV-UC253-V is suitable for installation inside or outside the building
envelope.
•Install in a UL Listed enclosure only.
•Do not change the position of the End of Net switch at temperatures below -
22°F (-30C) to ensure proper operation and electrical connectivity.
Physical
Fire-retardant plastic ABS, UL94-5VA
Terminal blocks and
connectors
Screw-type terminal blocks.
0.2 in (5.08 mm) pitch connectors
Mounting
35mm DIN rail mounting or screw mounting

What is the TV-UC253-V?
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Installation and Start-up Guide All rights reserved.
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Overall dimensions
A:
B:
Depth:
7.78 in. (19.77 cm)
5.88 in. (14.94 cm)
2.00 in. ( 5.09 cm)
Screw mounting dimensions
C:
D:
5.3 in (13.45 cm)
4.50 in. (11.43 cm)
Air flow sensors
E:
F:
G:
.49 in. (1.26 cm.)
1.96 in. (4.98 cm)
.41 in. (1.05 cm)
Weight
1.2 lbs (0.54 kg)
BACnet support
Conforms to the BACnet Advanced Application Controller (B-AAC) and B-BBMD
Standard Device Profiles as defined in ANSI/ASHRAE Standard 135-2012 (BACnet)
Annex L, Protocol Revision 14
Compliance
United States of America:
FCC CFR, Part 15, Class B
Canada:
Industry Canada Compliant, ICES-003, Class A
cUL Listed UL 916, PAZX7, Energy Management Equipment
Europe: Mark, UK:
EN50491-5-2:2009; Part 5-2: EMC requirements for HBES/BACS used in
residential, commercial and light industry environment
RoHS Compliant: 2015/863/EU
REACH Compliant

What is the TV-UC253-V?
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Installation and Start-up Guide All rights reserved.
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Zone sensors
You can wire ZS sensors and/or a Wireless Adapter that communicates with wireless sensors to the TV-UC253-V's
Rnet port. You can have up to 5 ZS and/or wireless sensors.
NOTES
•One control program can use no more than 5 ZS sensors.
•ZS and wireless sensors can share the Rnet with an Equipment Touch or TruVu™ ET Display.
CAUTION Rnet power
The Rnet port provides 12 Vdc at up to 260 mA. When determining which devices to put on the Rnet, verify that
the total current draw of the sensors does not exceed the controller's Rnet power. See the sensor's Installation
and Start-up Guide to determine the power required.
Touchscreen devices
You can connect the TV-UC253-V to the touchscreen devices using the Rnet port or the USB Service port.
Rnet port
You can wire an Equipment Touch or TruVu™ ET Display to the TV-UC253-V's Rnet port to view or change the
controller's property values, schedule equipment, view trends and alarms, and more, without having to access the
system's server. The Rnet port can have one Equipment Touch or TruVu™ ET Display, plus ZS sensors and/or a
Wireless Adapter that communicates with wireless sensors.
NOTE These touchscreen devices are not powered by the Rnet port.
•The TruVu™ ET Display requires a 24 Vdc external power source.
•The Equipment Touch requires a 24 Vac external power source.
USB port
You can connect the TruVu™ ET Display to the TV-UC253-V's USB Service port to view or change the controller's
property values, schedule equipment, view trends and alarms, and more, without having to access the system's
server.
NOTES
•These touchscreen devices are not powered by the USB port.
•The TruVu™ ET Display requires a 24 Vdc external power source.
CAUTION A touchscreen device can share a power supply with the Carrier controller if:
•The power source shared by the controller and Equipment Touch is AC power.
•The power source shared by the controller and TruVu™ ET Display is DC power.
•You maintain the same polarity.
•You use the power source only for Carrier controllers.

To mount the TV-UC253-V
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The TV-UC253-V can be mounted on a DIN rail or screwed to a surface.
DIN rail mount
1 In the trough on the back of the controller, hook the edge of the DIN rail under the controller's two mounting
flanges.
2 Push the controller toward the DIN rail until you hear it click and the spring-loaded latch secures the
controller to the DIN rail.
Screw Mount
Leave about 2 in. (5 cm) on each side of the controller for wiring.
Pull the mounting tabs until they click in place. Insert #6 screws through them. Use no more than 12 in lbs. torque
to secure plastic tab to mounting surface. Use flat washers to prevent the screw head from deforming the plastic.
A:
B:
C:
D:
E:
F:
G:
Depth:
7.78 in. (19.77 cm)
5.88 in. (14.94 cm)
5.3 in. (13.45 cm)
4.50 in. (11.43 cm)
.49 in. (1.26 cm)
1.96 in. (4.98 cm)
.41 in. (1.05 cm)
2.00 in (5.08 cm)
To mount the TV-UC253-V

Wiring for power
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Installation and Start-up Guide All rights reserved.
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WARNING Do not apply line voltage (mains voltage) to the controller's ports and terminals.
CAUTIONS
•The TV-UC253-V is powered by a Class 2 power source. Take appropriate isolation measures when mounting
it in a control panel where non-Class 2 circuits are present.
•Carrier controllers can share a power supply as long as you:
•Maintain the same polarity.
•Use the power supply only for Carrier controllers.
To wire for power
1 Remove power from the power supply.
2 Pull the red screw terminal connector from the controller's power terminals labeled 24V.
3 Connect the power supply's wires to the red screw terminal connector.
4 Connect an 18 AWG or larger wire from the power supply's negative (-) terminal to earth ground. This wire
must not exceed 12 in. (30.5 cm).
5 Apply power to the power supply.
6 Measure the voltage at the red screw terminal connector to verify that the voltage is within the operating
range of 20.4 to 28.8 Vac or 21.6 to 28.8 Vdc.
7 To verify the polarity of the wiring, measure the voltage from the negative terminal of the red screw terminal
connector to a nearby ground. The reading should be 0V.
8 Insert the red screw terminal connector into the controller's power terminals.
9 Verify that the LED on top of the controller is on.
Wiring for power

Addressing the TV-UC253-V through the Service port
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Installation and Start-up Guide All rights reserved.
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The TV-UC253-V is addressed using the controller setup pages. The Local Network tab allows you to discover all i-
Vu® XT or TruVu™ devices on a single network and configure them from that page. See Addressing a network of
controllers using the controller setup Local Network tab (page 12) and the Local Network (page 44) tab.
You can connect the TV-UC253-V to a computer one of two ways.
CAUTION The USB local access cable provides a common ground connection between the computer and the
controller it connects to. Damage to the controller and possibly the computer’s USB port will occur if the
controller’s input power polarity was not maintained and was also not properly grounded (floating). If you are not
sure of the wiring polarity and that the controller was properly grounded, use a USB isolator between the computer
and the controller.
NOTE You cannot access the Service port by plugging an Ethernet cable into Eth0 or Eth1.
To connect the TV-UC253-V to a computer using the Carrier wireless service adapter.
1 Insert the Carrier wireless service adapter (part# USB-W) into the controller's USB Service Port to
communicate with a Wi-Fi-compatible computer.
CAUTION If the Eth1 port is in use, connect a USB Type-A Male to Female extension cable to the USB
Service Port and the Carrier wireless service adapter.
2 Open your computer's wireless network display to view your available wireless networks.
NOTE TV-UC253-V only supports the 5 GHz band and not the 2.4 GHz band.
3 Connect to the wireless network using the network SSID and password that are printed on the Carrier
wireless service adapter.
4 Open a web browser on the computer and navigate to http://local.access or http://169.254.1.1 to see the
controller setup pages.
Addressing the TV-UC253-V through the Service port

Addressing the TV-UC253-V through the Service port
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Installation and Start-up Guide All rights reserved.
10
To connect the TV-UC253-V to the computer using a USB cable.
1 Connect a USB Type-A Male to Male USB cable from a computer to the controller's USB Service Port, as
shown below.
2 A new Ethernet connection will appear on your computer.
3 If your computer uses a static IP address, use the following settings for the new connection:
○Address: 169.254.1.x, where x is 2 to 7
○Subnet Mask: 255.255.255.248
○Default Gateway: 169.254.1.1
If it uses a DHCP address, leave the address as it is.
4 Open a web browser on the computer
Navigate to http://local.access or http://169.254.1.1 to see the controller setup pages.
See To set up the controller through the Service Port (page 42) for detailed information.

Addressing the TV-UC253-V through the Service port
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To set the IP address
You must define the TV-UC253-V's IP addressing (IP address, subnet mask, and default gateway) on the controller
setup Ports tab so that the controller can communicate with the i-Vu Server on the IP network.
Use one of the IP addressing schemes described below with the associated instructions that follow.
Use a...
If...
DHCP IP Address
generated by a DHCP server
The IP network uses a DHCP server for IP addressing
Custom Static IP Address
from your network administrator
You do not use a DHCP server and the answer to any of the
following questions is yes. Will the i-Vu® system:
•Share a facility's existing IP data network?
•Be connected to the Internet?
•Have at least one device located on the other side of an IP
router?
•Be connected to any third-party IP devices?
NOTE Carefully plan your addressing scheme to avoid duplicating addresses. If third-party devices are integrated
into the system, make sure your addresses do not conflict with their addresses.
To set a DHCP IP address
1 On the controller setup Modstat tab, find the controller’s Ethernet MAC address and write it down.
2 On the Ports tab under IP Port, select DHCP.
3 Click Save.
4 Write down the IP Address.
5 Give the DHCP network administrator the IP address and Ethernet MAC address and ask him to reserve that
IP address for the controller so that it always receives the same IP address from the DHCP server.
To set a custom static IP address
1 Obtain the IP address, subnet mask, and default gateway address for the controller from the facility network
administrator.
2 On the controller setup Ports tab under IP Port, select Custom Static.
3 Enter the IP Address, Subnet Mask, and Default Gateway addresses that the network administrator gave
you.
4 Click Save.

Addressing a network of controllers using the controller setup Local Network tab
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12
You can use the controller setup Local Network tab to discover Carrier i-Vu® XT or TruVu™ devices on a single
network. You can configure them and assign addresses to each one using one of the methods described below.
NOTE For this discovery tool to work, the controllers must reside on the same subnet and be downloaded with
drv_fwex_107-xx-xxxx or later.
Method 1: To address when you know the serial numbers
1 Connect one i-Vu® XT or TruVu™ device on the IP network to the Service port. For details, see Addressing the
TV-UC253-V through the Service port (page 9).
NOTE This device is referred to as the "connected controller".
2 Browse to the Service Port address (http://local.access or http://169.254.1.1).
3 On the Ports tab, set the device's IP Address, Subnet Mask, and Default Gateway.
4 On the controller setup Local Network tab, verify that the device's address information is displayed at the top
of the page.
5 On the Local Network tab, click the Clear All button to erase the Local Devices table if there is information in
it.
6 Click Discover. The table finds and lists the first 256 unconfigured devices on the same subnet. The table is
sorted by serial number.
NOTE A maximum of 256 i-Vu® XT or TruVu™ controllers can be discovered and displayed in the Local
Devices table. If you have more than 256 controllers on your network, configure some or all the controllers in
the table and click Clear. Check Only Unconfigured and click Discover again. A count appears above the table
to report the total number of controllers and the discovered number.
7 To configure devices:
○One at a time - Enter the IP Address and Location or name (optional) of each device you wish to
configure. When you enter the IP address, that device inherits the original device's subnet mask and
default gateway.
○Multiple devices simultaneously - Select the devices you want to address, enter the starting IP address in
the field under the Address heading, and then click Assign. The selected devices are automatically
assigned sequential IP addresses.
NOTE To change the IP Address, the device's Mode must be Custom Static.
For more details about discovering and configuring your devices, see Local Network tab (page 44).
Addressing a network of controllers using the controller setup Local
Network tab

Addressing a network of controllers using the controller setup Local Network tab
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Method 2: To address when you do not know the serial numbers
You will need physical access to each device so that you can press the DSC button on the bottom right of the TV-
UC253-V. This allows you to identify the device on the controller setup Local Network page.
1 Connect to the Service Port of one i-Vu® XT or TruVu™ IP device on the network. For details, see Addressing
the TV-UC253-V through the Service port (page 9).
2 Browse to the Service Port address (http://local.access or http://169.254.1.1).
3 On the Ports tab, set the device's IP Address, Subnet Mask, and Default Gateway.
NOTES The other devices that you configure inherit this device's subnet mask and default gateway.
4 On the Local Network tab, click the Clear All button to erase any pre-existing data in the Local Devices table.
5 On the controller you want to address, press the DSC button on the bottom right. When pressed, a row
appears in the Local Devices table on the Local Network tab. The row has a blue dot to indicate which
controller has just had the button pressed.
6 In the row for the identified controller, enter the Address and Location (optional).
7 Repeat steps 3 and 4 for each controller that you want to address.
8 For more details about discovering and configuring your devices, see Local Network tab (page 44).
NOTE To physically identify a device that is displayed on the Local Devices table, you can click the Blink button,
which causes that device's Net and Sys LEDs to flash light blue for 10 seconds.
The following are two possible methods you could use to identify and assign a network of controllers' addresses
after following steps 1 - 4 above.
•Two technicians can work together if they are communicating throughout the process. The first technician
physically travels around the building to each controller, tells his co-worker exactly where he is, and then
presses the DSC button. The second technician, who is sitting at a computer connected to the controller,
watches for the blue dot to show up on the Local Devices table on the Local Network tab, where he can enter
the appropriate addressing and identifying information.
•One technician alone can address the controllers on a mobile device showing the Local Network page by
plugging the Carrier wireless service adapter into a controller's Service Port. Then, with the computer, move to
each controller within 100 ft. of the adapter. Pressing the DSC button on the controller displays a blue dot in
the table where the addressing information can be entered.

Wiring for communications
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The TV-UC253-V communicates on the following ports.
Port
Protocol
Port type(s)
Speed(s)
Eth0
Eth1
BACnet/IP
BACnet/Ethernet
Ethernet
10 or 100 Mbps
Service port *
USB 2.0
USB
Comm Port
(future use)
USB 2.0
USB
Rnet Port
See Wiring devices to the TV-UC253-V's Rnet port (page 16).
Act Net Port
See Wiring devices to the TV-UC253-V's Act Net port (page 17).
*See To set up the controller through the Service port (page 42).
Wiring specifications
For...
Use...
Maximum Length
Ethernet - not
daisy chained
Cat5e or higher Ethernet cable
328 feet (100 meters)
Ethernet - a
daisy chain
configuration
Cat5e or higher Ethernet cable
164 feet (50 meters)
WARNINGS
•Do not apply line voltage (mains voltage) to the controller's ports and terminals.
•Do not exceed the minimum bend radius of the Cat5e or Cat6e Ethernet cable. Refer to Ethernet cable
manufacturer specifications for minimum bend radius.
Wiring for communications

Wiring for communications
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To connect the TV-UC253-V to the Ethernet
Connect an Ethernet cable from the building BAS system or another TV-UC253-V controller to the Eth0 Ethernet
port. If necessary, connect another Ethernet cable from the Eth1 port to the next TV-UC253-V controller in a daisy
chain.
The TV-UC253-V has a fail-safe Ethernet relay that bypasses a daisy chained controller in the event of an internal
disruption, such as a power loss. When a failure occurs and the switch is bypassing a controller, the network
connection on both sides of the controller are electrically connected, which continues the signal and passes it to
the next controller.
NOTE If your system has controllers on different IP subnets separated by an IP router, you must configure one
controller on each subnet as a BACnet Broadcast Management Device (BBMD). Do not configure more than one
BBMD per subnet as this may cause circular routes. See "Setting up BACnet Broadcast Management Devices
(BBMDs)" in SiteBuilder or i-Vu® Help.

Wiring devices to the TV-UC253-V's Rnet port
TruVu™ UC253-V ©2022 Carrier.
Installation and Start-up Guide All rights reserved.
16
You can wire the following devices to the TV-UC253-V's Rnet port in a daisy-chain configuration:
•ZS sensors
•Wireless Adapter that communicates with wireless sensors
•Equipment Touch
•TruVu™ ET Display
See the device's Installation and Start-up Guide for complete wiring instructions.
NOTES
•ZS sensors, a Wireless Adapter, and an Equipment Touch can share the same Rnet.
•The Rnet communicates at a rate of 115.2 kbps.
Wiring devices to the TV-UC253-V's Rnet port