HMS Intesis IN485UNI001I000 User manual

Modbus RTU interface for infrared HVAC integration
Compatible with IR-enabled AC units, from most brands
USER MANUAL
Issue date: 04/2021 r1.0 ENGLISH

Intesis®Modbus –IR Universal AC
User's manual r1.0 EN
© HMS Industrial Networks S.L.U. - All rights reserved
This information is subject to change without notice
URL https://www.intesis.com
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Important Information
Disclaimer
The information in this document is for informational purposes only. Please inform HMS Industrial Networks of any
inaccuracies or omissions found in this document. HMS Industrial Networks disclaims any responsibility or liability for
any errors that may appear in this document.
HMS Industrial Networks reserves the right to modify its products in line with its policy of continuous product
development. The information in this document shall therefore not be construed as a commitment on the part of HMS
Industrial Networks and is subject to change without notice. HMS Industrial Networks makes no commitment to update
or keep current the information in this document.
The data, examples and illustrations found in this document are included for illustrative purposes and are only intended
to help improve understanding of the functionality and handling of the product. In view of the wide range of possible
applications of the product, and because of the many variables and requirements associated with any particular
implementation, HMS Industrial Networks cannot assume responsibility or liability for actual use based on the data,
examples or illustrations included in this document nor for any damages incurred during installation of the product.
Those responsible for the use of the product must acquire sufficient knowledge in order to ensure that the product is
used correctly in their specific application and that the application meets all performance and safety requirements
including any applicable laws, regulations, codes and standards. Further, HMS Industrial Networks will under no
circumstances assume liability or responsibility for any problems that may arise as a result from the use of
undocumented features or functional side effects found outside the documented scope of the product. The effects
caused by any direct or indirect use of such aspects of the product are undefined and may include e.g. compatibility
issues and stability issues.
ORDER CODE
LEGACY ORDER CODE
IN485UNI001I000
-

Intesis®Modbus –IR Universal AC
User's manual r1.0 EN
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Table of Contents
1Presentation ............................................................................................................................................ 4
2Quick setup.............................................................................................................................................. 4
3Device Installation ................................................................................................................................... 5
Device emplacement and IR connection............................................................................................ 5
Connection to EIA-485....................................................................................................................... 6
Mini USB port ..................................................................................................................................... 6
4Modbus Interface Specification ............................................................................................................... 7
Modbus physical layer........................................................................................................................ 7
Modbus Registers .............................................................................................................................. 7
4.2.1 AC Control and status registers............................................................................................... 7
4.2.2 AC startup registers ................................................................................................................. 8
4.2.3 Device Registers...................................................................................................................... 9
Implemented Modbus functions ....................................................................................................... 10
EIA-485 bus. Termination resistors and Fail-Safe Biasing mechanism........................................... 10
5Configuration settings............................................................................................................................ 11
DIP-switch settings........................................................................................................................... 11
Push button functionality .................................................................................................................. 11
Device LED indicator........................................................................................................................ 12
Intesis® MAPS Config Tool.............................................................................................................. 13
6Technical Specs .................................................................................................................................... 14
7List of compatible AC indoor units......................................................................................................... 15

Intesis®Modbus –IR Universal AC
User's manual r1.0 EN
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This information is subject to change without notice
URL https://www.intesis.com
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1 Presentation
Intesis gateway IN485UNI001I000 provides full integration of infrared-enabled air conditioners into Modbus
RTU (EIA-485) networks.
Compatible with most AC units equipped with an IR receiver
Main features
•Reduced dimensions and quick installation
•Compatible with most AC brands, infrared enabled models
•Wall or desktop (surface) mounted. Reduced dimensions for easy installation.
•Direct connection to Modbus RTU over EIA-485 as a slave device
•Up to 63 interfaces can be connected to the Modbus network
•Auto-learn function for quick and easy setup of IR remote control
•Mini USB port for connection to config software. It is also used for power supply
•Power adapter included (EU, UK, USA and AU plugs supplied).
•Simultaneous control of the AC unit both from Modbus and from IR remote controller.
2 Quick setup
1. Connect the interface via mini USB to the PC (cable not included, Mini-USB Type Mini B)
2. Configure your device using Intesis MAPS configuration software (Check Intesis MAPS User Manual for detailed
description).
3. Install the interface in proximity of the AC indoor unit and connect it to the power supply. Check the interface
location that best fits the installation (More at chapter 3. Device Installation ). Use parrot mode to verify the device
location.
4. Connect RS485 to Modbus RTU network.
IMPORTANT: Power supply
The interface is USB-powered. If not connected to a computer for setting or testing routines from the Config
Tool, the USB port should be feeding 5 Volts DC from the power adapter (included)

Intesis®Modbus –IR Universal AC
User's manual r1.0 EN
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3 Device Installation
This Intesis device is equipped with four infrared (IR) emitters and one IR receiver. Two emitters point at the front, two
are 45º oriented, downwards, one for each side. The receiver gets feedback from the IR wireless remote controller, so
the AC unit status is reported to the Modbus system.
Figure 3.1 Built-in IR emitters and IR receiver
Device emplacement and IR connection
Intesis IN485UNI001I000 is intended for surface mount, either wall or desktop. Different emplacements are
acceptable, as shown in figures below.
Figure 3.2 Wall mount.

Intesis®Modbus –IR Universal AC
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Figure 3.3 Wall / desktop mount.
Case A: Placed side-by-side with the AC unit. The signal will travel from the Intesis device to the AC unit taking advantage
of the rebounds on the floor or furniture present in the room.
Case B: Placed in front of the AC unit. The signal will travel from the Intesis device directly to the AC unit.
Case C: Below the AC unit. In this case, the signal will travel from the Intesis device to the AC unit taking advantage of the
rebounds on the wall in front of it or other furniture.
Case D: Desktop mount. The signal will travel directly from the Intesis device to the AC unit
Figure 3.4 Built/in ports and sensors.
Connection to EIA-485
Notice the EIA-485 screw terminal block at the back of the device
Mini USB port
Use the USB cable to connect the device to a computer running config software, for setting and testing purposes, or to
the power adapter (included), for regular operation

Intesis®Modbus –IR Universal AC
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4 Modbus Interface Specification
Modbus physical layer
IN485UNI001I000 implements a Modbus RTU Slave interface, to be connected to an EIA-485 bus. It performs an 8N2
communication (8 data bits, no parity and 2 stop bit) with several available baud rates (2400 bps, 4800 bps, 9600 bps -
default-, 19200 bps, 38400 bps, 57600 bps, 76800 bps and 115200 bps). It also supports 8N1 communication (8 data bits,
no parity and 1 stop bit).
Modbus Registers
All registers are type “16-bit unsigned Holding Register” and they use the standard Modbus big endian notation. the
Modbus big endian notation.
4.2.1 AC Control and status registers
IN485UNI001I000 has the following Modbus Maps to control and monitor the AC unit. Consider that this table
shows the maximum range of values available in every Modbus register and that it will be adapted to the IR
control to simulate in every application.
Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
0
1
R/W
AC unit On/Off
▪0: Off
▪1: On
1
2
R/W
AC unit Mode 1
▪0: Auto
▪1: Heat
▪2: Dry
▪3: Fan
▪4: Cool
2
3
R/W
AC unit Fan Speed 1
▪0: Auto
▪1: FS1
▪2: FS2
▪…
▪9: FS9
3
4
R/W
AC unit Vertical Vane Position 1
▪0: Auto
▪1: Pos1
▪2: Pos2
▪…
▪7: Pos7
▪10: Swing
4
5
R/W
AC unit Temperature Setpoint 2,3,3
▪-32768 (Initialization value)
▪16..31 (ºC) (0 = undetermined)
▪61..86 (ºF) (0 = undetermined)
5
6
R
AC unit Ambient Temperature ¡Error! Marcador no definido.,2,3
▪18..30 (ºC) (0 = undetermined)
▪64,4..86 (ºF) (0 = undetermined)
1
Available values will depend on the AC unit mode. Check the AC unit user manual to know the possible values for this register
2
Magnitude for this register can be adjusted to Celsius x 1ºC, Celsius x 10ºC (default) or Fahrenheit.
3
It is not possible turn to x10 the value shown in Fahrenheit.

Intesis®Modbus –IR Universal AC
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Register Address
(protocol address)
Register Address
(PLC address)
R/W
Description
▪0x8000 No setpoint sent from the Remote controller
7
8
R/W
IN485UNI001I000 Disablement 4
▪0: IN485UNI001I000 enabled (Default value)
▪1: IN485UNI001I000 disabled
8
9
R/W
AC Remote Control Disablement 5
▪0: Remote Control enabled (Default value)
▪1: Remote Control disabled
9
10
R/W
AC unit Operation Time
▪0..65535 (hours). Counts the time the AC unit is in “On” state.
26
27
R/W
AC unit Horizontal Vane Position ¡Error! Marcador no definido.
▪0: Auto
▪1: Pos1
▪2: Pos2
▪…
▪7: Pos7
▪10: Swing
27
28
R/W
AC unit Vertical Vane Pulse ¡Error! Marcador no definido.
▪1: Pulse
34
35
R/W
AC unit Horizontal Vane Pulse ¡Error! Marcador no definido.
▪1: Pulse
70
71
R
Relative humidity
▪0-100% relative huminity
21
22
R
Max. number of fan speeds
Maximum number of fan speeds available.
24
25
R
AC max setpoint ¡Error! Marcador no definido.,2,3
▪-32768 (Initialization value)
Upper limit for setpoint setting
25
26
R
AC min setpoint ¡Error! Marcador no definido.,2,3
▪-32768 (Initialization value)
Lower limit for setpoint setting
200
201
R/W
Parrot Mode
▪0: Not active
▪1: Active
4.2.2 AC startup registers
Register Address (protocol
address)
Register Address
(PLC address)
R/W
Description
1100
1101
R/W
Reset operation at startup:
▪0: Don’t send status to AC
▪1: Send status to AC
1101
1102
R/W
AC unit On/Off at startup
▪0: Off
▪1: On
1102
1103
R/W
AC unit Mode at startup5
4
This value is stored in non-volatile memory
5
Available values will depend on the AC unit mode. Check the AC unit user manual to know the possible values for this register

Intesis®Modbus –IR Universal AC
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▪0: Auto
▪1: Heat
▪2: Dry
▪3: Fan
▪4: Cool
1103
1104
R/W
AC unit Fan Speed at startup 1
▪0: Auto
▪1: FS1
▪2: FS2
▪…
▪9: FS9
1104
1105
R/W
AC unit Temperature Setpoint at startup 6,7,3
▪-32768 (Initialization value)
▪16..31 (ºC) (0 = undetermined)
61..86 (ºF) (0 = undetermined)
1105
1106
R/W
AC unit U/D Vane Position at startup ¡Error! Marcador no definido.
▪0: Auto
▪1: Pos1
▪2: Pos2
▪…
▪7: Pos7
▪10: Swing
1106
1107
R/W
AC unit L/R Vane Position at startup ¡Error! Marcador no definido.
▪0: Auto
▪1: Pos1
▪2: Pos2
▪…
▪7: Pos7
▪10: Swing
4.2.3 Device Registers
Register Address (protocol
address)
Register Address
(PLC address)
R/W
Description
14
15
R
Modbus RTU baud-rate
▪2400 bps
▪4800 bps
▪9600 bps (Default)
▪19200 bps
▪38400 bps
▪57600 bps
▪76800 bps
▪115200 bps
15
16
R
Modbus Slave Address
▪1..63
49
50
R
Device definition (device ID)
50
51
R
Software version
97
98
R/W
Block Periodic Sendings 8
▪0: Non-blocked (Default value)
6
Magnitude for this register can be adjusted to Celsius x 1ºC, Celsius x 10ºC (default) or Fahrenheit.
7
It is not possible turn to x10 the value shown in Fahrenheit.
8
If the register is configured as “0:Non-blocked”, all commands received from Modbus will be sent to the AC system. If “1: Blocked”, commands from Modbus
will only be sent to the AC system if they differ from the previous value.

Intesis®Modbus –IR Universal AC
User's manual r1.0 EN
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▪1: Blocked
99
100
R/W
Reset device
▪1: Reset
203
204
R
IR Remote version
204
205
R
IR Remote code
202
203
R/W
RGB led criteria:
▪0: OFF
▪1: ON
▪2: Report only changes
206
207
R/W
RGB Led intensity. Values 1…5
10
11
R
AC unit Alarm Status
▪0: No alarm condition
▪1: Alarm condition
11
12
R
Error Code (IN485UNI001I000 errors)
▪0: No error present
▪Any other: device error:
Error value
Error MBS
Description
0
65536
No error
-4
65532
Initialization value
-15
65521
Internal error
-16
65520
RCFWrongCRC error
Implemented Modbus functions
IN485UNI001I000 implements the following standard Modbus functions:
▪3: Read Holding Registers
▪4: Read Input Registers
▪6: Write Single Register
▪16: Write Multiple Registers (Despite this function is allowed, the interface does not allow to write operations
on more than 1 register with the same request, this means that length field should be always be 1 when this
function is being used in case of writing)
EIA-485 bus. Termination resistors and Fail-Safe Biasing mechanism
EIA-485 bus requires a 120 Ω terminator resistor at each end of the bus to avoid signal reflections.
In order to prevent fail status detections by bus receivers when all the transmitters’ outputs are in three-state (high
impedance), it is also required a fail-safe biasing mechanism. This mechanism provides a safe status (a correct voltage
level) in the bus when all the transmitters’ outputs are in three-state. The Fail-Safe-Biasing mechanism is enabled by
DIP-switch settings
Please check section 5.1 DIP-switch settings for details
The IN485UNI001I000 device includes an on-board terminator resistor of 120 Ω that can be connected to the EIA-485
bus by using built-in DIP-switch block. Some Modbus RTU EIA-485 Master devices can provide also internal 120 Ω
terminator resistor and/or fail-safe biasing. Check the technical documentation of the Master devices connected to the
EIA-485 network in each case.

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5 Configuration settings
DIP-switch settings
To access the onboarded DIP-switch block, the enclosure must be opened by bending both frontal tabs (inserting a plane
tool tip size <5 mm). This operation must be performed by qualified personnel only
Figure 5.8 Onboarded DIP-switch block
Push button functionality
The device is equipped with one push button which performs two different actions:
Action 1: AC ON&OFF
AC ON/OFF STATUS
User action
Device action
OFF
1 click
ON+COOL+25ºC
OFF
2 clicks
ON+HEAT+21ºC
ON
1 or 2 clicks
OFF
When Parrot mode is active, switching ON&OFF the AC is not permitted from this button. Please, exit Parrot
mode to enable AC ON&OFF.
Action 2: Parrot mode enable / disable
AC ON/OFF STATUS
User action
Device action
ON or OFF
3 clicks
Activate/deactivate Parrot mode
When Parrot mode is enabled, the device will simply emit every IR signal picked at by the receiver, acting as a
repeater. Parrot mode is used for testing or troubleshooting to confirm the device location for AC control.
DIP-switch
Description
EIA-485 bus without a termination
resistor
Internal 120 Ωtermination resistor
connected to EIA-485 bus
No bus polarization
Active bus polarization

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Device LED indicator
The device is equipped with one multicolor LED indicator. Different colors are used to report different operation modes
and operation conditions, as described in following tables
Normal operation
LED COLOR
Blink freq / steady
Device informs…
READ
STEADY
HEAT mode
BLUE
STEADY
COOL mode
BLUE
STEADY
DRY mode
YELLOW
STEADY
AUTO mode
GREEN
STEADY
FAN mode
RED
BLINK 3 times
Command received or sent during HEAT mode
BLUE
BLINK 3 times
Command received or sent during COOL mode
BLUE
BLINK 3 times
Command received or sent during DRY mode
YELLOW
BLINK 3 times
Command received or sent during AUTO mode
GREEN
BLINK 3 times
Command received or sent during FAN mode
Parrot mode
Parrot mode is a function to find the best device location for its normal operation.
LED COLOR
Blink freq / steady
Device informs…
WHITE
0.5 s ON –0.5 s OFF
Parrot mode ON
Auto-learn mode
Autolearn is a function that allows to autoconfigure the native AC infrared remote controller in the IN485UNI001I000
device. This function can be enabled via Intesis Maps only, please, refer to Intesis Maps configuration manual for
IN485UNI001I000 to use this function.
LED COLOR
Blink freq / steady
Device informs…
WHITE
STEADY
Device is ready to get an IR frame
Device connected via USB
LED COLOR
Blink freq / steady
Device informs…
ORANGE
STEADY
(low intensity)
USB link performed
ORANGE
STEADY
(high intensity)
Intesis Maps communication
MAGENTA
0.5 s ON - 0.5 s OFF
USB communication (FW download in progress)
CYAN
1s ON - 1s OFF (x3)
FW download finished
Error notification
LED COLOR
Blink freq / steady
Device informs…
RED
Deadly blinking
RCF corruption
Check Intesis Maps configuration manual to know how to overcome this error.

Intesis®Modbus –IR Universal AC
User's manual r1.0 EN
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This information is subject to change without notice
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Intesis® MAPS Config Tool
This interface in configured using Intesis Maps®. You can download this software for free in www.intesis.com.
Please, review Intesis Maps IN485UNI001I000 user manual to learn how to configure the device using this software.

Intesis®Modbus –IR Universal AC
User's manual r1.0 EN
© HMS Industrial Networks S.L.U. - All rights reserved
This information is subject to change without notice
URL https://www.intesis.com
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6 Technical Specs
Enclosure
Plastic, type PC (UL 94 V-0)
Dimensions: 93 x 60 x 21 mm / 3.7” x 2.3” x 0.8”
Color: Light Grey. NCS S 1002-B
Operation
Temp
0°C to +60°C
Weight
55 g
Storage
Temp
-20°C to +85°C
Mounting
Surface mount (wall or desktop).
Operation
humidity
5% to 95%, non-condensing
Terminal
Wiring
(low-voltage
signals)
Per terminal: solid wires or stranded wires
(twisted or with shielded termination)
1 core: 0.25mm2… 1 mm2
2 cores: 0.25mm2… 0.75 mm2
3 cores: 0.25mm2… 0.75 mm2
Storage
Temp
< 95%, non-condensing
EIA –485
1 x EIA485 3-pin plug-in screw terminal block:
A, B, SG
Protection
IP20 (IEC60529)
USB port
1 x Mini-USB Type Mini B.
Power consumption: max. 400mA @ 5 Vdc
LED
indicator
1 x external LED –operational status
Buttons
1 x Button

Intesis®Modbus –IR Universal AC
User's manual r1.0 EN
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This information is subject to change without notice
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7 List of compatible AC indoor units.
This interface is compatible with almost every AC indoor unit with IR (infrared) control. Check if your AC unit is
already integrated in this link.
If your AC unit or IR remote controller were not in the list, contact Intesis TS Team to confirm if the IR remote is
already integrated or how to initiate the integration process.