AUREL RTX-868-NB User manual

RTX-868-NB
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User manual
The technical features can change without forecasting. AUR°EL S.p.A doesn’t assume any responsibility of damage due to the improper use of the device.
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AUR°EL S.p.A.
Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY
Tel.: [phone] Fax: [phone]
http://www.aurelwireless.com - email: [email protected]
Preliminary 19
/03/20
19
Pag 1di 8
RTX-868-NB is a SMD multichannel narrow band transceiver operating in 868 00 - 868 60 MHz band
allowing long distances with very low power consumption
The device is suitable for battery powered sensors requiring very low power consumption, in particular for
smoke and fire detection applications
A typical scenario is an alarm sensor network in which each node is able to detect an alarm
When a device detects the alarm, it activates a node local warning and it sends a broadcast RF message to
notify the alert to all the other devices of the network
RTX-868-NB has also the possibility to locally deactivate the alarm and notify the deactivation to all the
devices of the network
It is furthermore possible to test the link radio between two devices, an useful feature during the network
installation
For security reasons each radio communication is encrypted with AES 128 algorithm
Main Features Applications
Reduced dimensions ( 20 x 20 x 2.5 mm )
40mW max RF output power
Sensitivit -115dBm
Blocking categor 1
10uA average current consumption
Encr pted data transmission
Smoke detector
Fire detector

RTX-868-NB
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----------------------
------------
------
User manual
The technical features can change without forecasting. AUR°EL S.p.A doesn’t assume any responsibility of damage due to the improper use of the device.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
AUR°EL S.p.A.
Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY
Tel.: [phone] Fax: [phone]
http://www.aurelwireless.com - email: [email protected]
Preliminary 19
/03/20
19
Pag 2di 8
Absolute maximum ratings
Operating Temperature -20°C ÷ +70°C
Storage Temperature -60°C ÷ +150°C
Supply Voltage -0 5V ÷+5 5V
Input Voltage -0 5V ÷+5 5V
Technical characteristics
Min. T p. Max. Unit
DC levels
Supply Voltage pin 9 2 1 3 3 6 V
Current consumption (Wake on Radio mode)
4
10 uA
Current consumption (Rx continuous)
1
16 mA
Current consumption (Tx continuous)
1
65 70 mA
High level voltage in input 2 0 Vcc V
Low level voltage in input 0 0 8 V
Pin output current 8 mA
RF TX
Frequency
1
868 1 868 5 MHz
Offset frequency at +25°C +4 -4 KHz
RF channels
2
5
RF power
1
15 16 dBm
ERP with Aurel antenna “ANT 868 SMA” 15 dBm
Modulation GFSK
Deviation GFSK modulation ±15 kHz
Channel bandwidth -3dB 40 kHz
Data-rate 4800 bps
Temperature Frequency stability -20+70°C -9 +9 kHz
RF spurious emissions < 1GHz -36 dBm
RF spurious emissions > 1GHz -30 dBm
RF power in adjacent channel in TX -36 dBm
Pin 1 ESD contact discharge protection (61000-4-2) 8 kV
Pin 1 ESD air discharge protection (61000-4-2) 15 KV
RF RX
RX sensitivity -115 dBm
RX Bandwidth 40 kHz
Data-Rate 4800 bps
Adjacent channel rejection 37 dB
AFC -18 +18 kHz
Blocking category
3
1
Blocking test at ±2MHz
3
-12 dBm
Blocking test at ±10MHz
3
3 dBm
Blocking test at ±5%
3
5 dBm
Note 1: Test carried out with 50 ohm load on pin 1 (antenna)
Note 2: See table 2 for frequency channel values
Note 3: Test performed in accordance with 5 18 of ETSI EN 300 220-1 V3 1 1 (2017-02)
Note 4: Wake on Radio mode RTX switches from power-down to RX-ON state every 10s

RTX-868-NB
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----------------------
------------
------
User manual
The technical features can change without forecasting. AUR°EL S.p.A doesn’t assume any responsibility of damage due to the improper use of the device.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
AUR°EL S.p.A.
Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY
Tel.: [phone] Fax: [phone]
http://www.aurelwireless.com - email: [email protected]
Preliminary 19
/03/20
19
Pag 3di 8
Pin description
Figure 1: Pin-out and mechanical drawing
PIN
-
OUT
1) ANTENNA
2) GND
3) ALARM
4) UART RX
5) UART TX
6) TEST/DISABLE
7) RF CH Sel2
8) RF CH Sel1
9) Vcc
10) GND
11) GND
12) GND
13) RF CH Sel0
14) NET Sel0
15) RESET
16) NET Sel1
17) OUT
18) NET Sel2
19) TEST MODE sel
20) GND
21) GND
22) GND
Pin Name Description
1 ANTENNA Antenna connection, 50 ohm impedance
2 GND Ground connection
3 ALARM
Alarm input, active low (normally high with 65k ohm pull-up resistor)
4 UART RX
Not implemented
5 UART TX
Not implemented
6 TEST/DISABLE
Test and alarm disable input, active low (normally high with 65k ohm pull-up resistor)
7 RF CH Sel2 RF channel selection input, active low (normally high with 65k ohm pull-up resistor)
8 RF CH Sel1
RF channel selection input, active low (normally high with 65k ohm pull-up resistor)
9 Vcc
Connection to supply voltage 2,1V-3,6V / 100mA
10 GND Ground connection
11 GND Ground connection
12 GND Ground connection
13 RF CH Sel0 RF channel selection input, active low (normally high with 65k ohm pull-up resistor)
14 NET Sel0 Network ID selection input, active low (normally high with 65k ohm pull-up resistor)
15 RESET
Input reset, active low
16 NET Sel1 Network ID selection input, active low (normally high with 65k ohm pull-up resistor)
17 OUT
Output
18 NET Sel2 Network ID selection input, active low (normally high with 65k ohm pull-up resistor)
19 TEST MODE Sel Test mode selection input, active low (normally high with 65k ohm pull-up resistor)
20 GND Ground connection
21 GND Ground connection
22 GND Ground connection
Table 1: pin description

RTX-868-NB
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----------------------
------------
------
User manual
The technical features can change without forecasting. AUR°EL S.p.A doesn’t assume any responsibility of damage due to the improper use of the device.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
AUR°EL S.p.A.
Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY
Tel.: [phone] Fax: [phone]
http://www.aurelwireless.com - email: [email protected]
Preliminary 19
/03/20
19
Pag 4di 8
Operation
At power on the device activates the OUT pin (active high), it performs the initialization and it deactivates
the OUT pin
After the power on initialization the RTX-868-NB uses the WOR (Wake on Radio) functionality which
enables the radio to periodically wake up from sleep mode and listen for incoming packets The radio goes
back to sleep mode unless a packet has been detected
This technique, with 10 seconds wake up time, allows to receive valid RF packets with an average current
consumption of about 10uA
On the transmitter side it is of course necessary transmit a long packet preamble so that the receiver can
wake up and detect the presence of the packet This means that the transmitted radio packet is 12 seconds
long
The device is designed for battery powered, sensors network requiring very low power consumption, in
particular for smoke and fire detection applications
A typical scenario is a network of radio sensors for residential use, each integrating the RTX-868-NB, a
sensor (e g smoke or fire sensor) connected to the ALARM input (pin 3) and an alert notification apparatus
(e g warning horn) connected to the OUT pin (pin 17)
When the ALARM input (normally high with 65k ohm pull-up resistor) goes low and stays low at least
20msec the RTX-868-NB considers the alarm activated and then it:
1 activates the OUT pin (active high) for the local warning;
2 send the alarm RF radio packet (12 seconds long) : all the other devices of the network (see section
below for network selection) receive the packet and then activate their OUT pin
In a similar way it is possible to deactivate manually the alarm through the TEST/DISABLE input (pin 6)
typically connected to a push button If the TEST/DISABLE pin (normally high with 65k ohm pull-up resistor)
goes low and it stays low at least 3 seconds, when it goes back high the device:
1 deactivates the OUT pin (pin low) for the local warning disable;
2 send the alarm disable RF radio packet (12 seconds long) : all the other devices of the network receive
the packet and then deactivate their OUT pin

RTX-868-NB
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----------------------
------------
------
User manual
The technical features can change without forecasting. AUR°EL S.p.A doesn’t assume any responsibility of damage due to the improper use of the device.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
AUR°EL S.p.A.
Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY
Tel.: [phone] Fax: [phone]
http://www.aurelwireless.com - email: [email protected]
Preliminary 19
/03/20
19
Pag 5di 8
RF CHANNEL and NETWORK ID selection
RF CH Sel0, RF CH Sel1 and RF CH Sel2 pins allow the user to select the RF channel in which the device
works
5 RF channels are available as shown in Table 2:
Channel num
RF CH Sel2
pin 9
RF CH
Sel1
pin 8
RF CH Sel0
pin 13 RF channel (MHz)
1
1
1
1
868 1
2
1
1
0
868 2
3
1
0
1
868 3
4
1
0
0
868 4
5
0
1
1
868 5
Table 2: RF channel selection
Note 5: RF CH Sel pins are normally high with 65k ohm pull-up resistor, it means that the value 1 corresponds to a pin connected to
Vcc or not connected, the value 0 corresponds to a pin connected to ground
It is mandatory that all the devices of the same installation work on the same RF channel
In case of more than one installation in the same RF coverage area it is recommended to set each
installation in a different RF channel
NET Sel0, NET Sel1 and NET Sel2 pins allow the user to select the Network ID of an installation
8 Network IDs are available and all the devices of the same installation must have the same ID
The device considers a RF received packet valid only if it is transmitted by a node with the same NET Sel0,
NET Sel1 and NET Sel2 pins configuration
In this way more than one installation present in the same RF coverage area may be separated even if they
work on the same RF channel
Network ID
NET Sel2
Pin 18
NET
Sel1
Pin 16
NET
Sel0
Pin 14
1
0
0
0
2
0
0
1
3
0
1
0
4
0
1
1
5
1
0
0
6
1
0
1
7
1
1
0
8
1
1
1
Table 3: Network ID selection (see Note 5)
RF channel and Network ID settings are detected only at power on therefore for any changes of the setting
it is necessary to turn off the device, modify the setting and turn on the device again or reset the device
(pin 15 connected to GND)

RTX-868-NB
-----------------------------------------------------------------------------------------------------------------------------
----------------------
------------
------
User manual
The technical features can change without forecasting. AUR°EL S.p.A doesn’t assume any responsibility of damage due to the improper use of the device.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
AUR°EL S.p.A.
Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY
Tel.: [phone] Fax: [phone]
http://www.aurelwireless.com - email: [email protected]
Preliminary 19
/03/20
19
Pag 6di 8
To avoid an increase of current consumption don't change RF channel and Net selection pins status when
the device is powered on
TEST MODE selection
It is possible to test the link radio between two devices, in the following way:
1 Connect the TEST MODE Sel pin to GND on the two devices: in this way both devices are in RF receive
mode waiting for a RF test packet or for the TEST/DISABLE input (pin 6) forced low
2 If on the Device 1, the TEST/DISABLE (pin 6) goes low and it stays low at least 20 msec, when it goes
back high the device sends a RF TEST packet
3 If the Device 2 is in radio coverage (pin 19 LOW, pin 6 High), it receives the test packet, it sends the RF
ACK packet and it activates the OUT pin 17 for 300msec
4 If the Device 1 receives the ACK packet it activates the OUT pin 17 for about 3 seconds If the ACK
packet is not received the Device 1 blinks three times the OUT pin
TEST MODE setting is detected only at power on therefore for any changes of the setting it is necessary to
turn off the device, modify the setting and turn on the device again, or reset the device (pin 15 connected
to GND)
To avoid an increase of current consumption don't change TEST MODE Sel pin status when the device is
powered on
DEVICE USAGE
In order to obtain the performances described in the technical specifications and to comply with the
operating conditions which characterize the certification, the transceiver should be mounted on a printed
circuit taking into account the following:
Power Suppl :
1 RTX-868-NB must be supplied from very low voltage safety source protected against the short circuits
maximum voltage variations allowed: 2 1 ÷ 3 6 V However it is preferable to maintain a stable voltage to a
predetermined value in the range of voltage as specified above, using a "fast transient response" voltage
regulator
2 Decoupling, close to the transceiver, with a ceramic capacitor of minimum 100nF
3 Connect electrolytic capacitor 100uF, low ESR, close to pin 9 (Vcc)
Input pin interface:
Put 100pF capacitors close to the corresponding general purpose digital inputs pins, connected between
them and the ground plane

RTX-868-NB
-----------------------------------------------------------------------------------------------------------------------------
----------------------
------------
------
User manual
The technical features can change without forecasting. AUR°EL S.p.A doesn’t assume any responsibility of damage due to the improper use of the device.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
AUR°EL S.p.A.
Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY
Tel.: [phone] Fax: [phone]
http://www.aurelwireless.com - email: [email protected]
Preliminary 19
/03/20
19
Pag 7di 8
Ground:
The ground must surround at the best the welding area of the module and must also be realized in the
lower face of the PCB in order to obtain the optimal result, with the through holes connecting the two
ground planes
Antenna:
Connect pin 1 (antenna) to the coaxial connector or antenna, with 50 ohm constant impedance microstrip
width 3 2 mm for PCB with thickness 1 6 mm and width 1 6 mm for PCB with thickness 1mm
The antenna is a typical rigid copper wire (insulated or not) of 8cm length and cross-section at least of 0 5
mm² placed vertically to the ground plane Other placements of antenna (bend, coil) will work but
performance are not predictable
As an alternative to connect the module to an external antenna, connect an SMA connector into PCB using
50 ohm microstrip line
Reference Rules
RTX-868-NB transceiver is compliant with the european set of rules EN 300 220-2, and EN 301 489-3
The transceiver must be supplied by a very low voltage safety source protected against short circuits
The usage of the module is foreseen inside enclosures that guarantee the EN 61000-4-2 normative not
directly applicable to the module itself
This device is compliant with EN 62479, connected to the electromagnetic field human exposition, if used
with temporal duty cycle not higher than 1% like foreseen in CEPT 70-03 recommendation
CEPT 70-03 Recommendation
RTX-868-NB recommendation is referred to the 868 0 - 868 6 MHz harmonized bandwidth and therefore, in
order to comply with local regulations, the device must be used on the time scale with maximum duty-cycle
time of 1% (equivalent to 36 seconds of usage on 60 minutes)

RTX-868-NB
-----------------------------------------------------------------------------------------------------------------------------
----------------------
------------
------
User manual
The technical features can change without forecasting. AUR°EL S.p.A doesn’t assume any responsibility of damage due to the improper use of the device.
-------------------------------------------------------------------------------------------------------------------------------------------------------------------
AUR°EL S.p.A.
Via Foro dei Tigli, 4 - 47015 Modigliana (FC) – ITALY
Tel.: [phone] Fax: [phone]
http://www.aurelwireless.com - email: [email protected]
Preliminary 19
/03/20
19
Pag 8di 8
Firmware version summar
Release
date
Firmware
version Changes from the previous version
07/03/201
9
1 0
First stable version
User manual revision summar :
Release
date
Revision user
manual Changes from the previous revision
19
/03/201
9
1
0
Preliminary