AUREL RTX-868-NB Manuel utilisateur

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.: +39.0546.941124 Fax: +39.0546.941660

http://www.aurelwireless.com - email: [email protected]

Preliminary 19

/03/20

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.: +39.0546.941124 Fax: +39.0546.941660

http://www.aurelwireless.com - email: [email protected]

Preliminary 19

/03/20

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)

10 uA

Current consumption (Rx continuous)

16 mA

Current consumption (Tx continuous)

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

868 1 868 5 MHz

Offset frequency at +25°C +4 -4 KHz

RF channels

RF power

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

Blocking test at ±2MHz

-12 dBm

Blocking test at ±10MHz

3 dBm

Blocking test at ±5%

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.: +39.0546.941124 Fax: +39.0546.941660

http://www.aurelwireless.com - email: [email protected]

Preliminary 19

/03/20

Pag 3di 8

Pin description

Figure 1: Pin-out and mechanical drawing

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.: +39.0546.941124 Fax: +39.0546.941660

http://www.aurelwireless.com - email: [email protected]

Preliminary 19

/03/20

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.: +39.0546.941124 Fax: +39.0546.941660

http://www.aurelwireless.com - email: [email protected]

Preliminary 19

/03/20

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)

868 1

868 2

868 3

868 4

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

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

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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.: +39.0546.941124 Fax: +39.0546.941660

http://www.aurelwireless.com - email: [email protected]

Preliminary 19

/03/20

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

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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.: +39.0546.941124 Fax: +39.0546.941660

http://www.aurelwireless.com - email: [email protected]

Preliminary 19

/03/20

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

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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.