AUREL RTX-868-NB Operation & User’s Manual

------------------------------------------------------------------------------------------------------------------------------------------------------------------- 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 19/03/2019 Pag 1 di 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
Sensitivity -115dBm
Blocking category 1
10uA average current consumption
Encrypted data transmission
Smoke detector
Fire detector

------------------------------------------------------------------------------------------------------------------------------------------------------------------- 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 19/03/2019 Pag 2 di 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. Typ. 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.

------------------------------------------------------------------------------------------------------------------------------------------------------------------- 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 19/03/2019 Pag 3 di 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

------------------------------------------------------------------------------------------------------------------------------------------------------------------- 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 19/03/2019 Pag 4 di 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.

------------------------------------------------------------------------------------------------------------------------------------------------------------------- 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 19/03/2019 Pag 5 di 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).

------------------------------------------------------------------------------------------------------------------------------------------------------------------- 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 19/03/2019 Pag 6 di 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 Supply: 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.

------------------------------------------------------------------------------------------------------------------------------------------------------------------- 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 19/03/2019 Pag 7 di 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).

------------------------------------------------------------------------------------------------------------------------------------------------------------------- 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 19/03/2019 Pag 8 di 8 Firmware version summary Release date Firmware version Changes from the previous version 07/03/2019 1.0 First stable version User manual revision summary: Release date Revision user manual Changes from the previous revision 19/03/2019 1.0 Preliminary