Vega Absolute NB-14 User manual

www.vega-absolute.ru
NB-IOT MODEM WITH RESISTANCE CONTROL
VEGA NB-14
USER MANUAL
DOCUMENT REVISION
FIRMWARE VERSION
04 0.7

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CONTENTS
INTRODUCTION......................................................................................................................................................................... 3
1 DEVICE PURPOSE AND OPERATION PRINCIPAL.............................................................................................................. 4
Device Purpose ....................................................................................................................................................................... 4
Operation Algorithm.............................................................................................................................................................. 4
Functional ................................................................................................................................................................................ 5
Marking ..................................................................................................................................................................................... 5
2 SPECIFICATION ....................................................................................................................................................................... 6
Device Specification .............................................................................................................................................................. 6
Default Device Settings ......................................................................................................................................................... 7
3 OPERATION.............................................................................................................................................................................. 8
Device Appearance ................................................................................................................................................................ 8
Contacts ................................................................................................................................................................................. 10
Hall Sensor ............................................................................................................................................................................. 12
Buttons ................................................................................................................................................................................... 13
Indication ............................................................................................................................................................................... 14
Mounting Recomendations................................................................................................................................................ 15
4 COMMUNICATION PROTOCOL ........................................................................................................................................ 17
5 STORAGE AND TRANSPORTATION REQUIREMENTS ................................................................................................... 19
6 CONTENT OF THE PACKAGE ............................................................................................................................................. 20
7 WARRANTY ............................................................................................................................................................................. 21

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INTRODUCTION
This manual is designated for Vega NB-14 modem resistance control (hereinafter – the
modem) manufactured by Vega-Absolute OOO and provides information on powering and
activation procedure, control commands and functions of the modem.
This manual is targeted at specialists familiar with installation work fundamentals of
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 DEVICE PURPOSE AND OPERATION PRINCIPAL
DEVICE PURPOSE
Vega NB-14 modem is designed for monitor of insulation state of the warm network
pipelines and for control of integrity of pipelines signal wires, further accumulating and
transmitting of this information in NB-IoT network.
Modem allows to detect the following defects:
wet insulation;
the breakage of the signal wires;
closing of the signal wire to the pipe (detected like ‘wet insulation’ defect).
Modem does not detect a reason and a place of defect appearing
In addition, Vega NB-14 can be used as a security device – two additional inputs operate
in security mode, there is also Hall sensor.
The modem can be used on pipelines with polyurethane foam heat insulation and/or
collect data from 1-Wire interface connected temperature sensors etc.
The modem is may powered by one or two batteries with capacity 6400 mAh.
OPERATION ALGORITHM
The readings collecting from the meter with a configurable period 5, 15, 30 minutes, 1,
6, 12 or 24 hours. The readings stored in the device memory and transmitting during the next
communication session with the NB-IoT network.
The adjustable data transfer period can be equal to 5, 15, 30 minutes, 1, 6, 12 and 24
hours. Data transferring in random point in time during set period. At the next communication
session, the device starts sending accumulated packets with readings, from the earliest to the
latest.
The device operates with confirmation all the time and send the next packet only after
receiving a confirmation of the delivery of the previous one. If such confirmation was not
received, NB-14 completes the communication session until the next one according to the
schedule. Herewith, the device continues to collect data according to the data collection
period and store it in memory. Non-transmitted packets remain in the device memory until the
next communication session.
The internal clock is set automatically when device connected to the "Vega NB-IoT
Configurator" via USB.

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FUNCTIONAL
Vega NB-14 modem has the following features:
Resistance measurement from 0 to 1 MOhm on the two inputs (insulation wetting
control)
Resistance value control on the two inputs - there more or less than 200 Ohm
(signal wire breakage control)
Two inputs operating in the «security» mode for connecting the external leakage
and safety sensors, etc.
Interface 1-Wire for connecting temperature sensors (up to 10 pc)
Queue of sending when delivery is not possible
Time referencing of readings by internal clock (UTC)
Extra communication when resistance is out of specified thresholds (signal wire
breakage, wet insulation)
Communication in case of security inputs or Hall sensor actuation
Measurement of temperature inside housing
Charge measuring of the battery (%)
MARKING
Device marked with sticker that contain the next information:
Device model;
IMEI;
Month and year of manufacture;
QR-code containing IMEI for automatized count.
Sticker located in three places – on device case, in factory certificate and on the packing
box.

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2 SPECIFICATION
DEVICE SPECIFICATION
MAIN
Monitoring of signal wire integrity and wet
insulation
2 channels
Interfaces 1-Wire
Security inputs 2
USB-port micro-USB, type B
Operating temperatures -40…+85 °С
Built-in temperature sensor yes
Hall sensor yes
Quantity of black box records up to 100 000
CELLULAR COMMUNICATIONS
Supported Cellular Standards
LTE Cat NB1
Data transfer protocol MQTT
Battery Life
2 years if the data transferring once a day
LTE NB-IoT antenna type
external
POWER
Built-in battery 6400 mAh (one or two, depending on
delivery conditions)
CASE
Housing dimensions 95 х 95 х 50 mm
Ingress protection rating IP67
PACKAGE
Dimensions, mm 165 х 118 х 57
Weight, kg 0,350

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DEFAULT DEVICE SETTINGS
PARAMETER
VALUE
Confirmed Uplinks OFF
Communication period 24 hours
Data collection period 24 hours
Time zone UTC +00:00
Guard inputs operate on short
Hall sensor ON
Send network statistics OFF
For changing the device settings, you need to connect to it with “Vega NB-IoT
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 NB-14 is represented in gray plastic case which has six screws and mounting for
DIN-rail. The device case is equipped with a hermetic gland of M12 size. A sealant is installed
inside the gland, ensuring compliance with the declared Ingress Protection rating of the device
case.
2 – cable gland of M12 size for installing the cables and wires with circular cross-section
with a diameter of 5...6 mm
3 – input of external antenna
1
2 3
Internal structure of cable gland

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All of elements for manage and indication as well as connecting contacts are placed on
the board inside the case.
4 – input for connecting an external antenna
5 – contacts
6 – USB-port
7 – manage buttons
8 – LED indicators
9 – SIM holder
10 – input for connecting a battery
9
4
5
6
7
8
10

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CONTACTS
When connecting a radio modem to external devices, consider the internal circuitry of
its digital inputs ALARM1 and ALARM2 shown below.
Contact PCB designation Description
1 GND Ground
2
ALARM1
Security input 1
3
GND
Ground
4 ALARM2 Security input 2
5 GND Ground
6 ONE_WIRE 1-Wire
7 RA_INPUT2 Input 2 of channel A
8 RA_INPUT1 Input 1 of channel A
9
RB_INPUT2
Input 2 of channel B
10
RB_INPUT1
Input 1 of channel B
11 GND Ground
12 GND Ground
There are two digital security inputs on the boars which allows to connect circuits with
the following types of NO contacts:
reed switch;
Circuit design of the digital inputs

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mechanical pushbutton;
open-collector output.
The device monitors status changes on the security inputs and when the security input
triggers, the device is activated and sends an alarm message to the network. The trigger
mechanism is configured through the program "Vega NB-IoT Configurator".
For resistance monitoring the modem has two equivalent channels: A and B. Every
channel designed for measurement of two types of the resistance – pipeline insulation
resistance Rins and signal wire resistance Rw. Consider the principle of device operation on the
example of channel A.
Device measures resistance according with scheme pictured above and determines
presence of defects of the pipeline insulation or the signal wire after that. Table of control
values:
Object state Values of control
parameters
Text in the
program (see
part 4)
Color in the
program (see
part 4)
Signal wire is integrity Rw≤ 200 Ohm OK green
Breakage of the signal wire Rw> 200 Ohm breakage red
Pipeline insulation is OK Rins > 1 MOhm normal 1 green
500 kOhm < Rins ≤ 1 MOhm normal 2 green
100 kOhm < R
ins
≤ 500 kOhm
normal 3
green
50 kOhm < R
ins
≤ 100 kOhm
normal 4
green
5 kOhm < Rins ≤ 50 kOhm normal 5 green
Wet insulation (or signal
wire closed to metal pipe)
Rins ≤ 5 kOhm wet yellow
When device finds out a defect from ‘red’ or ‘yellow’ zone, it forms an alarm packet and
if setting ‘Send data immediately’ is active then sends it in the NB-IoT network. If the setting

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does not active the alarm packet is saved in black box until the communication session
according the schedule (see details in part 4).
HALL SENSOR
The device has Hall sensor which located on the board edge on the bottom side. When
the magnet is brought up the sensor triggered, and the device can form the alarm message
which immediately transmitted to the server.

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BUTTONS
There are two buttons on the board which can help you to manage the device. Buttons
are described in the table below.
RESET
Short pressing Device reloading
INIT
Pressing for 1 second Registration at the network
Pressing for 2 seconds Data transmitting
Pressing for 3 seconds LTE-modem switching off
When you hold down the button, the red LED starts flashing once a second, which will
help you to find out the duration of pressing. Pressing for 1 second corresponds to one flash of
the LED, pressing for 2 seconds corresponds to two and so on.
INIT button
RESET button
INIT button
RESET button
INIT button
RESET button

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INDICATION
There are two LEDs on the board: red and blue. Blue LED VD19 shows LTE-modem state,
and red LED VD18 – the device state.
LTE-modem
Short flash every three
seconds Device search the network
Short flash every
second
Device successfully registered and it is
in the network
Two short flashes every
one second Device transmits data to the network
No light LTE-modem switched off
Device
Short flash every
second Battery charge is lower than 5%
Short flash every five
seconds Device in the ‘Operation’ mode
No light Device in the ‘Sleep’ mode or switched
off
LEDs located on
the board

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MOUNTING RECOMENDATIONS
The counter shall be installed and adjusted by qualified specialists to ensure proper
operation of the device.
2nd wire – ground is connecting to contact GND
Shield – is connecting to contact GND
Before starting mounting work, you must make sure that the latest
firmware version is installed on the equipment
For mounting you will need:
SIM-card;
wire stripper;
laptop.
Step by step mounting be like:
1. Installing SIM-card into holder;
2. Setting the device through the “Vega NB-IoT Configurator” – the first and second
steps are usually carried out in the office.
3. De-energizing the connected equipment, metering devices, etc.
4. Placement the wires in the cable gland. It must be remembered that the wires must
be united in one cable of circular cross-section with diameter of 5…6 mm.
Inside the cable gland there is a sealant ensuring compliance with the
declared Ingress Protection rating of the device case. When removing
the sealant, as well as when installing wires of a different diameter or
cross-section, device performance may deteriorate until failure due to
moisture entering the case
5. Connecting all necessary wires to the contacts.

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6. Connecting the battery at the connector. After the battery connection the device
loads and comes to sleep until the next communication session.
7. If you need to test the data transmitting, then press and hold the INIT button for the
2 seconds.
8. Before assembling the device, you can reset the pulses accumulated during testing
and connection through the “Vega NB-IoT Configurator” if it is necessary.
9. Assembling the device.
Location of the SIM
slot on the board (if
there is)
Battery connector’s
location on the
board

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4 COMMUNICATION PROTOCOL
Data is transmitted via MQTT protocol. You should specify in the device settings the
address and port of the server where the data will be sent. Those settings specified in
application “Vega NB-IoT Configurator”. It must be MQTT broker as a server (received side).
You should specify in the device settings the address and port of the broker. Also, you should
specify a topic name where the data published and a client name – the name which the device
use for publishing. All those settings specified in “Vega NB-IoT Configurator” in part “MQTT
settings”. For watching the data sending by the device you should deploy MQTT broker on a
PC and become subscribed on MQTT broker with any application.
Vega NB-14 sends the message on the server as a text of JSON format. See example
below.
{
"Message": {
"dev": "NB-14 v0.1",
"IMEI": "867723030711443",
"IMSI": "250990283462252",
"ICCID": "8970199170730496235",
"num": 3,
"UTC": 1571227504
},
"CellStatus": {
"TAC": "9C8D",
"CID": "0856831D",
"SQ": 19,
"EARFCN": 1240,
"PCID": 26,
"RSRP": -822,
"RSRQ": -108,
"RSSI": -744,
"SNR": 119
},
"Telemetry": {
"reason": "time",
"UTC": 1571227500,
"bat": 99,
"temp": 28,
"RAW": 43,
"RAI": 580,
"RBW": 22,
"RBI": 1100,
"onewire":[21.6,20.6,21.6,2.2,1.4,33.2,31.7,18.4,14.9,-11.8],
"s_alarm1": 0,
"s_alarm2": 0,
"s_magnet": 0,
"s_raw": 0,
"s_rai": 1,
"s_rbw": 0,
"s_rbi": 1
}

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}
Transcription of the message fields:
Message – part with information about current message.
dev – name and version of the device firmware
IMEI – LTE-modem identifier
IMSI,ICCID – SIM-card (SIM-chip) identifiers
num – the number of the message
UTC – the date and the time of message sending in UTC format by Greenwich
CellStatus – part with information about the cellular state
TAC, CID – gateways identifiers
SQ – gateway signal quality
EARFCN – the number of radio frequency channel (absolute)
PCID – physical network address
RSRP – input signal power
RSRQ – input signal quality
RSSI – indicator of the input signal power
SNR – signal to noise ratio
Telemetry – part with collected data (one packet)
reason – reason for packet forming*
UTC – the date and the time of message collecting in UTC format by Greenwich
bat – battery charge
temp – processor temperature
RAW – wire resistance on channel А [Ohm] (RAW - Resistance, channel A, Wire)
RAI – insulation resistance on channel А [kOhm] (RAI - Resistance, channel A,
Isolation)
RBW – wire resistance on channel B [Ohm] (RBW - Resistance, channel B, Wire)
RBI – insulation resistance on channel B [kOhm] (RBI - Resistance, channel B,
Isolation)
onewire – values of temperatures of sensors on 1-Wire bus
s_alarm1 – state of ALARM1 input at the time of data slice ("0" - logic zero input,
"1" - logic one input)
s_alarm2 – state of ALARM2 input at the time of data slice ("0" - logic zero input,
"1" - logic one input)
s_magnet – the presence of an external magnetic field at the time of data slice
("0" - absent, "1" - presence)
s_raw – alarm flag, signal wire breakage on channel A ("0" - normal, "1" - breakage)
s_rai – alarm flag, insulation resistance lower than threshold on channel A ("0" -
normal, "1" – under threshold)
s_rbw – alarm flag, signal wire breakage on channel B ("0" - normal, "1" - breakage)
s_rbi – alarm flag, insulation resistance lower than threshold on channel B ("0" -
normal, "1" – under threshold)

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5 STORAGE AND TRANSPORTATION REQUIREMENTS
Vega NB-14 modem shall be stored in the original packaging in heated room at
temperatures +5 °С to +40 °С and relative humidity less than 85%.
The modem shall be transported in covered freight compartments of all types at any
distance at temperatures -40 °C to +85 °C.

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6 CONTENT OF THE PACKAGE
The modem is delivered complete with:
Vega NB-14 modem – 1 pc.
Antenna – 1 pc.
Battery 6400 mAh – 1 or 2 pcs. 1
Factory certificate – 1 pc.
1The quantity of batteries depending on delivery conditions