Vega Absolute M-BUS-2 User manual

www.vega-absolute.ru
LORAWAN CONVERTER
M-BUS-2
USER MANUAL
DOCUMENT REVISION
FIRMWARE VERSION
10 2.3

M-BUS-2 / User Manual
2 Revision 10 - 13.10.2021
CONTENTS
INTRODUCTION.........................................................................................................................................................................3
1 DESCRIPTION AND OPERATION ......................................................................................................................................... 4
Device description ................................................................................................................................................................. 4
Work algorithm ....................................................................................................................................................................... 4
Functional ................................................................................................................................................................................ 6
Marking.....................................................................................................................................................................................6
2 SPECIFICATION .......................................................................................................................................................................7
Device specification............................................................................................................................................................... 7
Default device settings .......................................................................................................................................................... 8
3 OPERATION.............................................................................................................................................................................. 9
Device appearance.................................................................................................................................................................9
Contacts .................................................................................................................................................................................10
Led indication........................................................................................................................................................................10
Mounting recomendations.................................................................................................................................................11
Converter operation in the independent poll mode of the metering devices ........................................................14
Converter operation in the universal poll mode............................................................................................................14
4 COMMUNICATION PROTOCOL – 1.1 VERSION.............................................................................................................15
Converter M-BUS-2 transmits the following types of packets ...................................................................................15
1. Packet with current readings from connected heat meter ...................................................................................15
2. Packet with data from connected M-BUS device in universal poll mode........................................................... 16
3. Packet with time correction request..........................................................................................................................16
4. Settings packet............................................................................................................................................................... 17
Converter M-BUS-2 receives packets of the following types .....................................................................................18
1. Real-time clock adjustment ........................................................................................................................................ 18
2. Packet with request of settings................................................................................................................................... 18
3. Packet with settings is identical to such packet from device ................................................................................18
5 STORAGE AND TRANSPORTATION REQUIREMENTS ...................................................................................................20
6 CONTENT OF THE PACKAGE .............................................................................................................................................21
7 WARRANTY ............................................................................................................................................................................. 22

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INTRODUCTION
This manual is designated for M-BUS-2 device (hereinafter – device, converter)
manufactured by Vega-Absolute OOO and provides information on powering and activation
procedure, control commands and functions of the device.
This manual is targeted at specialists familiar with installation work fundamentals for
electronic and electrical equipment.
Vega-Absolute OOO reserves the right to make changes to the manual related to the
improvement of equipment and software, as well as to eliminate typos and inaccuracies,
without prior notice.

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1 DESCRIPTION AND OPERATION
DEVICE DESCRIPTION
The device M-BUS-2 is designed for reading of values from metering instruments via M-
BUS interface and further accumulating and transmitting of this data to the LoRaWAN®network.
The converter is powered by a 6400 mAh built-in battery.
Converter M-BUS may operate in the independent poll mode of the metering devices
converter only with the next supported devices:
•Heat meter «Teplouchet-1»
•Heat meter «STE 21 «Berill»
•Heat meter «ELF-M Teplovodomer»
•Heat meter Landis Gyr T230
•Heat meter Sharky 775
•Heat meter Pulsar
•Heat meter Calec ST II
•Heat meter Calec ST II_2
•Heat meter Sensonic II
•Heat calculator ZENNER_MULTIDATA_WR3
•Heat meter “Pulse STK-15”
•Heat meter “Hiterm PUTM-1”
The list of supported metering devices depends on the firmware version, therefore, the
issue of support for a specific device should be specified when ordering.
Starting with firmware 2.0 and higher, different types of metering devices
can be connected to one converter
The converter is configured via USB using the special «Vega LoRaWAN Configurator»
software.
WORK ALGORITHM
Vega M-BUS-2 operates in the following modes:
«Storage» — it is a mode for storage and transportation. In this mode, the device does
not regularly transmit data to the network.
«Active» - device operating mode.
Before starting to use the converter, it is necessary to take out of the «Storage» mode.

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Vega M-BUS-2 device supports two activation methods in the LoRaWAN®network - ABP
and OTAA. One of the methods can be chosen using the «Vega LoRaWAN Configurator»
application (see the "User Manual" for the program).
Method ABP. After pressing the start button, the device immediately starts working in the
«Active» mode.
Method OTAA.After pressing the start button, the device will make three attempts to
connect to the network in the frequency plan specified when setting up. Upon receipt of
confirmation of activation in the LoRaWAN®network, the device will give a signal by the
indicator (glow for 5 seconds) and go into the «Active» mode. If all attempts are unsuccessful,
the counter will continue to accumulate data and will try to connect to the network every 6
hours.
It is possible to transfer the device from the "Active" mode back to the "Storage" mode
without disconnecting the power supply (battery or external) by long pressing the start button
(more than 5 seconds).
The device generates a packet with the current state with a configurable period from 5
minutes to 24 hours. Packets are saved in the device memory and are transmitted during the
next session of communication with the LoRaWAN®network.
Example
If the data collection period is 24 hours, then the package will be generated at 00.00
according to the internal clock of the device.
If the data collection period is 12 hours, then at 00.00 and at 12.00, and so on.
The data transfer period can be adjusted from 5 minutes to 24 hours. When
communicating, the device starts sending packets with readings, starting with the earliest one.
The specific data transfer time cannot be set, it is determined randomly for each device within
the selected data transfer period from the moment of connecting to the network.
Example
The data transfer period is set to 30 minutes, and the device was started at 16:40
according to the device's internal clock. At random counting, the device was assigned the time
16:41 to transmit a packet in a half-hour period from 16:40 to 17:10. Thus, packets from this
device will be transmitted at 16:41, 17:11, 17:41, 18:11, and so on every 30 minutes according to
the internal clock of the device..
The internal clock is set automatically when connected to the device via USB, and can
also be adjusted via the LoRaWAN®network.

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FUNCTIONAL
M-BUS-2 converter is A class device (LoRaWAN®classification) and has the following
features:
ADR support (Adaptive Data Rate)
Sending of confirmed packets (configurable)
Temperature measurement by the internal temperature sensor
Charge measuring of the built-in battery (%)
MARKING
Device marked with sticker that contain the next information:
Device model;
DevEUI;
Month and year of manufacture.
Sticker located in three places – on device case, in factory certificate and on the packing
box.
Besides, there is an additional sticker located on the packing box and contains:
Information about firmware version;
QR code containing activation keys for the device in the LoRaWAN®network and
other identifiers.

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2 SPECIFICATION
DEVICE SPECIFICATION
MAIN
M-BUS interface 1
Quantity of connecting M-BUS devices up to 10
USB-port mini-USB, type B
Operating temperatures -40…+85 °С
LoRaWAN®
LoRaWAN®class A
Quantity of LoRa channels 16
Default frequency plans
RU868, EU868, KZ865, custom
(EU868 based)
Frequency plans available on request IN865, AS923, AU915, KR920,
US915
Activation type ABP и OTAA
Communication period 5, 15, 30 minutes, 1, 6, 12 or 24
hours
Data collection period 5, 15, 30 minutes, 1, 6, 12 or 24
hours
Memory amount for storing packets 100 packets
Antenna connector SMA
Sensitivity -138 dBm
Radio coverage in restrained urban conditions max 5 km
Radio coverage within line of sight max 15 km
Transmitter power by default 25 mW (configurable)
POWER
Built-in battery 6400 mAh
Calculated number of packets sent by the device,
not less 15 000
CASE
Housing dimensions, no more than 104 х 95 х 29 mm
Ingress protection rating IP54
Mounting With screws
PACKAGE
Dimensions 152 х 123 х 38 mm
Weight 0,310 kg

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DEFAULT DEVICE SETTINGS
PARAMETER
VALUE
Frequency plan RU868
Activation type ABP or OTAA
Adaptive Data Rate (ADR) ON
Confirmed Uplinks OFF
Rx 1 delay 1 second
Join accept delay
5 seconds
Uplink number of transmissions 1
Data rate DR0
Power 14 dBm
Communication period 24 hours
Data collection period 24 hours
Time zone UTC +00:00
For changing the device settings, you need to connect to it with “Vega LoRaWAN
Configurator” application. You can download app on the iotvega.com site in SOFT section as
well as User Manual for configurator. Go to the app page.

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3 OPERATION
DEVICE APPEARANCE
Vega M-BUS-2 is represented in black plastic case screwed together.
1 – screws ø 3 mm х
2 – input of external antenna
3 – harness connector included
4 – screw fastening
All control and indication elements are located inside the case on the board.
1
2
6 9
8
7
5 – led indicator
6 – power connectors
7 – USB-port
8 – start button
9 – SMA connector for an
external LoRaWAN antenna
connection
3
4
5

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CONTACTS
Converter has 12 contact pairs which are M-BUS interfaces. Converter provide
connection up to 10 M-BUS devices. You can choose any 10 of 12 contact pairs. Wherein 1-2
contacts are M-BUS- (bot row), and 13-24 contacts are M-BUS+ (top row).
In order to increase the battery life, the physical level of the M-BUS interface is switch on
(supply voltage is applied to the outputs MBAS +, MBAS-) just before meter polling with a
programmable delay (the delay value is depends on the type of connected meter). The delay is
introduced for initializing own meter interface and its preparing for receiving data from the
converter. When the polling is complete, the physical M-BUS level is turned off.
LED INDICATION
There is one red LED on the board. The indication in only used when the device is
activated in the LoRaWAN® network and when the operating modes are changed.
LED on the board