Intesis INMBSMIT001I000, INMBSPAN001R000 User guide

Compatible with Domestic, Mr. Slim and City Multi lines commercialized by

Mitsubishi Electric

USER MANUAL

Issue date: 03/2021 r2.4 ENGLISH

Intesis® INMBSMIT001I000

User’s Manual r2.4 EN

This information is subject to change without notice

URL https://www.intesis.com

2 / 19

Modbus RTU (EIA-485) Interface for Mitsubishi Electric air conditioners

Compatible with Domestic, Mr. Slim and City Multi lines

commercialized by Mitsubishi Electric

ORDER CODE

LEGACY ORDER CODE

INMBSMIT001I000

ME-AC-MBS-1

Intesis® INMBSMIT001I000

User’s Manual r2.4 EN

This information is subject to change without notice

URL https://www.intesis.com

3 / 19

Important User 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.

Intesis® INMBSMIT001I000

User’s Manual r2.4 EN

This information is subject to change without notice

URL https://www.intesis.com

4 / 19

INDEX

1. Presentation .......................................................................................................... 5

2. Connection ............................................................................................................ 6

2.1 Connect to the AC indoor unit ............................................................................... 6

2.2 Connection to the EIA-485 bus ............................................................................. 6

3. Quick Start Guide ................................................................................................... 7

4. Modbus Interface Specification ................................................................................ 8

4.1 Modbus physical layer.......................................................................................... 8

4.2 Modbus Registers ................................................................................................ 8

4.2.1 Control and status registers ........................................................................... 8

4.2.2 Configuration Registers................................................................................ 10

4.2.3 Considerations on Temperature Registers ...................................................... 11

4.3 DIP-switch Configuration Interface ...................................................................... 13

4.4 Implemented Functions ..................................................................................... 16

4.5 Device LED indicator ......................................................................................... 16

4.6 EIA-485 bus. Termination resistors and Fail-Safe Biasing mechanism ...................... 16

5. Electrical and Mechanical features .......................................................................... 17

6. List of supported AC Unit Types. ............................................................................ 18

7. Error Codes ......................................................................................................... 19

Intesis® INMBSMIT001I000

User’s Manual r2.4 EN

This information is subject to change without notice

URL https://www.intesis.com

5 / 19

1. Presentation

The INMBSMIT001I000 interfaces allow a complete and natural integration

of Mitsubishi Electric air conditioners into Modbus RTU (EIA-485) networks.

Compatible with all models of Domestic and Mr.Slim line. Check the section 5 for more information.

Reduced dimensions. 93 x 53 x 58 mm // 3.7” x 2.1” x 2.3”

• Quick and easy installation.

Mountable on DIN rail, wall, or even inside the indoor unit on some models of AC.

• External power not required.

• Direct connection to Modbus RTU (EIA-485) networks. Up to 63 INMBSMIT001I000 devices

can be connected on the same network.

INMBSMIT001I000 is a Modbus slave device.

• Direct connection to the AC indoor unit. Up to 1 AC indoor units can be connected to

INMBSMIT001I000. The cable for this connection is also supplied.

• Configuration from both on-board DIP-switches and Modbus RTU.

• Total Control and Supervision.

• Real states of the AC unit's internal variables.

• Allows simultaneous use of the AC’s remote controls and Modbus RTU.

* Up to 63 Intesis devices can be installed in the same Modbus RTU bus. However, the installation of Modbus Repeaters may be

required.

• SCADA

• PLC

• DDC

• BMS

• HMI

• Controller

• etc

Up to 63 AC indoor units*

Modbus RTU EIA-485 network

Modbus RTU

Master

device

INMBSMIT001I000

INMBSMIT001I000 INMBSMIT001I000

Intesis® INMBSMIT001I000

User’s Manual r2.4 EN

This information is subject to change without notice

URL https://www.intesis.com

6 / 19

2. Connection

The interface comes with a specific cable and connectors to establish direct connection with the AC indoor unit. It comes as well with a plug-in terminal block of 2 poles to establish direct connection with the Modbus RTU EIA-485 network.

2.1 Connect to the AC indoor unit

To connect the INMBSMIT001I000 interface with the AC indoor unit you must follow these steps:

Disconnect Mains Power from the AC unit. Open the front cover of the indoor unit to have access to the electronic circuit. Once you arrive at the electronic circuit, locate the socket connector marked as CN105.

Take the cable that comes with the interface, insert one of its connectors (the one installed in the shortest uncovered part) into the socket of the INMBSMIT001I000, and the other connector (the one installed in the largest uncovered part) to the socket CN105 of the AC unit's electronic circuit. You can place the INMBSMIT001I000 inside or outside the AC indoor unit depending on your needs. Remember that the INMBSMIT001I000 must also be connected to the Modbus RTU EIA-485 network. Close the AC indoor unit's front cover again to finish the connection.

Do not modify the length of the cable supplied with the interface, it may affect the correct interface’s operation.

2.2 Connection to the EIA-485 bus

Connect the EIA-485 bus wires to the plug-in terminal block of INMBSMIT001I000 (the one with two poles) and keep the polarity on this connection (A+ and B-). Make sure that the maximum distance to the bus is 1,200 meters (3,937 ft). Loop or star typologies are not allowed in the case of the EIA-485 bus. A terminator resistor of 120Ω must be present at each end of the bus to avoid signal reflections. The bus needs a fail-safe biasing mechanism (see section 3.6 for more details).

CN105

AC indoor unit

Electronic control board

200 mm / 7.9”

40 mm / 1.6”

Connection cable provided with the interface

90 mm / 3.5”

EIA485

A B

AC Unit

53 mm / 2.1”

Use this hole to attach the cable using the staple and the screw provided with the interface

For wall mounting, extract the upper and lower staples until you listen the "click".

Fixing screw

Modbus RTU

EIA-485

Bus

+ 13 hidden pages

Intesis INMBSMIT001I000, INMBSPAN001R000 User guide

Specifications and Main Features

Frequently Asked Questions

User Manual