netvox R718J2 User manual

R718J2
Wireless 2-Input Dry Contact Interface
Wireless 2-Input Dry Contact Interface
R718J2
User Manual

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Table of Content
1. Introduction................................................................................................................ 2
2. Appearance................................................................................................................. 2
3. Main Feature .............................................................................................................. 3
4. Set up Instruction ....................................................................................................... 3
4.1 Power on and Turn on / off ................................................................................ 3
4.2 Join into the Network......................................................................................... 4
4.3 Function of Keys................................................................................................ 4
4.4 Data Report ........................................................................................................ 4
5. Restore to Factory Setting.......................................................................................... 7
6. Sleeping Mode............................................................................................................ 7
7. Low Voltage Alarming ............................................................................................... 7
8. Installation.................................................................................................................. 8
9. Information about Battery Passivation....................................................................... 8
9.1 To determine whether a battery requires activation........................................... 9
9.2 How to activate the battery ................................................................................ 9
10. Important Maintenance Instruction........................................................................ 10

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1. Introduction
R718J2 is a ClassA external 2-way dry contact device based on LoRaWAN open protocol of Netvox. It can externally connect
various switches, buttons, relays and reed switch output. It can detect the closing or disconnecting signal of dry contact and is
compatible with LoRaWAN protocol.
LoRa wireless technology:
LoRa is a wireless communication technology dedicated to long-distance low-power consumption. Its spread-spectrum
modulation method greatly increases the communication distance compared with other communication methods, and can be
widely used in long-distance low-rate IoT wireless communication fields in various occasions. Such as automatic meter reading,
building automation equipment, wireless security systems, industrial monitoring and control. It has the characteristics of small
size, low power consumption, long transmission distance and strong anti-interference ability.
LoRaWAN:
LoRaWAN defines an end-to-end standard specification using LoRa technology to ensure interoperability between devices and
gateways from different vendors.
2. Appearance

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3. Main Feature
⚫Apply SX1276 wireless communication module
⚫2 ER14505 lithium batteries (3.6V / section) parallel power supply
⚫Dry contact detection
⚫The base is attached with a magnet that can be attached to a ferromagnetic material object
⚫Protection class IP67
⚫Compatible with LoRaWANTM Class A
⚫Frequency hopping spread spectrum
⚫Configuration parameters can be configured via a third-party software platform, data can be read and alerts can be set via SMS
text and email (optional)
⚫Applicable to third-party platforms: Actility/ThingPark, TTN, MyDevices/Cayenne
⚫Low power consumption and long battery life
4.Set up Instruction
4.1 Power on and Turn on / off
(1) Power on: Insert batteries: open the battery cover; insert two sections of 3.6V ER14505 AA batteries and close the battery
cover.
(2) Turn on: If the device had never joined in any network or at factory setting mode, after powering on, the device is at off mode
by default setting. Press and hold function key for 3 seconds till the green indicator flashes once and release to turn on device.
(3) Turn off: Press and hold function key for 5 seconds till the green indicator flashes quickly and release. The green indicator
will flash 20 times to show that the device is turned off.
Note:
1. The interval between shutting down twice or power off/on is suggested to be about 10 seconds to avoid the interference of
capacitor inductance and other energy storage components.
2. Do not press function key and insert batteries in the same time, otherwise, it will enter engineer testing mode.
3. Turn off operation is same with “Restore to Factory Setting”operation.
4. Each time the battery is removed, it will be installed in the default “turn off”state, and users can turn on.

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4.2 Join into the Network
To join the device into LoRa network to communicate with LoRa gateway.
The network operation is as following:
(1) If the device had never joined any network, turn on the device; it will search an available LoRa network to join. The green
indicator will stay on for 5 seconds to show it joins into the network, otherwise, the green indicator will be off.
(2) If the device had been joined into a LoRa network, remove and insert the batteries; it will repeat step (1).
4.3 Function of Keys
(1) Press and hold function key for 5 seconds to reset to factory setting.After restoring to
factory setting successfully, the green indicator will flash quickly 20 times.
(2) Press function key to turn on the device which is in the network and the green indicator will flash once and the device will
send a data report.
4.4 Data Report
When the device is turned on, it will immediately send a version package.
Data will be reported once per hour by default setting.
Maximum time: 3600s
Minimum time: 3600s (Detect the current voltage value every 3600s by default setting)
Default reportchange:
Battery ---- 0x01 (0.1V)
Dry contact detection trigger:
When the dry contact is connected, the data status bit is “1”.
When the dry contact is disconnected, the data status bit is “0”.
Note:
The device send data cycle depends on real burning configuration.
The interval between two reports must be the minimum interval.

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Data report configuration and sending period are as following:
Report Configuration
ConfigReportReq
R718J2
0x01
0x43
MinTime
(2bytes Unit: s)
MaxTime
(2bytes Unit: s)
BatteryChange
(1byte Unit:0.1v)
Reserved
(4Bytes, Fixed 0x00)
ConfigReportRsp
0x81
Status
(0x00_success)
Reserved (8Bytes, Fixed 0x00)
ReadConfigReportReq
0x02
Reserved (9Bytes, Fixed 0x00)
ReadConfigReportRsp
0x82
MinTime
(2bytes Unit: s)
MaxTime
(2bytes Unit: s)
BatteryChange
(1byte Unit:0.1v)
Reserved
(4Bytes, Fixed 0x00)
(1)Configure R718PJ2 device parameter MinTime = 1min、MaxTime = 1min、BatteryChange = 0.1v
Downlink: 0143003C003C0100000000
Device Return:
8143000000000000000000 (configuration success)
8143010000000000000000 (configuration failure)
(2)Read R718J2 device parameter
Downlink: 0243000000000000000000
Device Return:
8243003C003C0100000000 (device current parameter)
Example#1 based on MinTime = 1 Hour, MaxTime= 1 Hour, Reportable Change i.e. BatteryVoltageChange=0.1V
MaxTime MaxTime
Sleeping(MinTime) Sleeping(MinTime)
Wakes up and collects data Wakes up and collects data
REPORTS 3.6V REPORTS 3.5V
Note:
MaxTime=MinTime. Data will only be report according to MaxTime (MinTime) duration regardless BtteryVoltageChange value.
Min. Interval
(Unit:second)
Max. Interval
(Unit:second)
Reportable Change
Current Change≥
Reportable Change
Current Change ＜
Reportable Change
Any number between
1~65535
Any number between
1~65535
Can not be 0.
Report
per Min. Interval
Report
per Max. Interval

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Example#2 based on MinTime = 15 Minutes, MaxTime= 1 Hour, Reportable Change i.e. BatteryVoltageChange= 0.1V.
MaxTime
Sleeping(MinTime) sleeping sleeping sleeping
0H 15th M 30th M 45th M 1H
2H
Wakes up and
collects data
REPORT 3.6V
Example#3 based on MinTime = 15 Minutes, MaxTime= 1 Hour, Reportable Change i.e. BatteryVoltageChange= 0.1V.
MaxTime
sleeping sleeping
0H 15th M 30th M 45th M 1H 1H 10th M 1H 25th M 1H 40th M 1 1H 55th M
Wakes up and
collects data
REPORT 3.6V
Wakes up and
collects data
3.6V
Does not report
Does not report
Wakes up and
collects data
3.6V
Does not report
Wakes up and
collects data
3.6V
Does not report
Wakes up and
collects data
REPORTS 3.6V
Wakes up and collects data
3.5V |3.5-3.6|=0.1
REPORTS 3.5V
Users push the button,
REPORTS 3.5V.
Recalculate MaxTime.
Wakes up and
collects data 3.5V
Does not report
Wakes up
and collects
data
REPORTS
3.6V
Wakes up and
collects data
3.6V Does not
report
Wakes up and
collects data
3.5V Does not
report
Wakes up and
collects data
3.5V Does not
report
Wakes up and
collects data
3.5V Does not
report
Wakes up and
collects data
3.5V Does not
report
Wakes up
and collects
data
REPORTS
3.5V

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5. Restore to Factory Setting
R718J2 saves data including network key information, configuration information, etc. To restore to factory setting, users need to
execute below operations.
1. Press and hold function key for 5 seconds till the green indicator flashes and then release; LED flashes quickly 20 times.
2. R718J2 is at off mode by default setting after restoring to factory setting.
Note: The device operation of turning off is the same as the “Restore Factory Settings”operation.
6. Sleeping Mode
The device is designed to enter sleeping mode for power-saving in some situations:
(A) While the device is in the network →the sleeping period is Min Interval. (During this period, if the reportchange is larger than
setting value, it will wake up and send a data report).
(B) When it is not in the network →R718J2 will enter sleeping mode and wake up every 15 seconds to search a network to join in
the first two minutes. After two minutes, it will wake up every 15 minutes to request to join the network.
If it’s at (B) status, to prevent this unwanted power consumption, we recommend that users remove the batteries to power off the
device.
7. Low Voltage Alarming
The operating voltage threshold is 3.2V. If the battery voltage is lower than 3.2V, the device will send a low-power warning to the
LoRa network.

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8. Installation
1. The dry contact sensor (R718J2) has a built-in magnet (as
Figure 1 below), which can be attached to the surface of an
iron object during installation, which is convenient and
quick.
In order to make the installation firmer, please use screws
(purchased separately) to fix the device to the wall or other
surface. (as Figure 2 below)
Note: Do not install the device in a metal shielded box or in
an environment surrounded by other electrical equipment to
avoid affecting the wireless transmission of the device.
2. After the dry contact sensor detects the change of the dry
contact state, it will report the data immediately.
3. If the battery voltage is detected that exceeds the change
value during Min Time, the data will be reported
immediately.
4. Whether the state of the dry contact is change, a piece of
data will be reported regularly when the MaxTime comes.
Note:
When the dry contact is connected, the data status bit is
“1”. When the dry contact is disconnected, the data status
bit is “0”.
Dry contact sensor (R718J2) can be used in the following
scenarios:
⚫Various switches and buttons
⚫Dry contact output of sensor
⚫The operating status of the equipment
⚫State monitoring of doors and windows in home or
business
The occasion is necessary to judge the state of the sensor
through the dry contact signal.
A diagram that the dry contact sensor (R718J2)
connecting to two wired smoke sensors.
Dry contact sensor
(R718J2)
(R718J2)
External
power
supply
DC24V+
Wired smoke sensor
Dry contact
DC24V-
1
2
3
4
1
2
3
4
External
power
supply
Wired smoke sensor
DC24V+
DC24V-

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9. Information about Battery Passivation
Many of Netvox devices are powered by 3.6V ER14505 Li-SOCl2 (lithium-thionyl chloride) batteries that offer many
advantages including low self-discharge rate and high energy density.
However, primary lithium batteries like Li-SOCl2 batteries will form a passivation layer as a reaction between the lithium
anode and thionyl chloride if they are in storage for a long time or if the storage temperature is too high. This lithium chloride
layer prevents rapid self-discharge caused by continuous reaction between lithium and thionyl chloride, but battery passivation
may also lead to voltage delay when the batteries are put into operation, and our devices may not work correctly in this situation.
As a result, please make sure to source batteries from reliable vendors, and it is suggested that if the storage period is more
than one month from the date of battery production, all the batteries should be activated.
If encountering the situation of battery passivation, users can activate the battery to eliminate the battery hysteresis.
ER14505 Battery Passivation:
9.1 To determine whether a battery requires activation
Connect a new ER14505 battery to a resistor in parallel, and check the voltage of the circuit.
If the voltage is below 3.3V, it means the battery requires activation.
9.2 How to activate the battery
a. Connect a battery to a resistor in parallel
b. Keep the connection for 5~8 minutes
c. The voltage of the circuit should be ≧3.3, indicating successful activation.
Brand
Load Resistance
Activation Time
Activation Current
NHTONE
165 Ω
5 minutes
20mA
RAMWAY
67 Ω
8 minutes
50mA
EVE
67 Ω
8 minutes
50mA
SAFT
67 Ω
8 minutes
50mA
Note:
If you buy batteries from other than the above four manufacturers, then the battery activation time, activation current, and
required load resistance shall be mainly subject to the announcement of each manufacturer.

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10. Important Maintenance Instruction
Kindly pay attention to the following in order to achieve the best maintenance of the product:
• Keep the equipment dry. Rain, moisture and various liquids or water may contain minerals that can corrode electronic circuits. In
case the device is wet, please dry it completely.
• Do not use or store in dusty or dirty areas. This way can damage its detachable parts and electronic components.
• Do not store in excessive heat place. High temperatures can shorten the life of electronic devices, destroy batteries, and deform
or melt some plastic parts.
• Do not store in excessive cold place. Otherwise, when the temperature rises to normal temperature, moisture will form inside
which will destroy the board.
• Do not throw, knock or shake the device. Treating equipment roughly can destroy internal circuit boards and delicate structures.
• Do not wash with strong chemicals, detergents or strong detergents.
• Do not paint the device. Smudges can make debris block detachable parts up and affect normal operation.
• Do not throw the battery into the fire to prevent the battery from exploding. Damaged batteries may also explode.
All the above suggestions apply equally to your device, batteries and accessories.
If any device is not operating properly, please take it to the nearest authorized service facility for repairing.