ZULU T Smart Radio Telemetry Module Features • 10 Channel Transceiver Module • Range up to 2,000 Metres • 10 Digital Input / Outputs • 2 Analogue Inputs (10bit), Outputs (PWM) • Receiver Outputs Follow Transmitter Inputs • Minimal external components • Direct Led Drive Shows Data Reception • Secure Data Protocol (auto Acknowledge) • Ultra Low Power 1.8—3.6V Operation • CE Compliant for Licence Free Use • Easy Pairing Process • One to One operation Applications • Remote Control • 868MHz Operating Frequency • Remote Networking • 100mW Transmit Power • Remote Switching • Small Form Factor • Remote Traffic Lights The ZULU-T Telemetry Module provides a reliable Transceiver based industrial Remote Switch with up to 2,000 metres range. Two modules are combined to provide a simple network of radio switching. Each unit is supplied ready to operate, once paired with another Module a remote control system is created Connections for Power, antenna and Input / Output are the only connections required Part No Description ZULU-T868 Radio Telemetry Module DIP Package ZULU-T868-SO Radio Telemetry Module SMT Package DS-ZULUT-2 ZULU Telemetry Pin out Pr im el Pin Description Pin No Name 1 ANT 2, 15 GND 3 Analogue / Digital In 4-5 I/O1-2 In / Out 6, 8-11, 25 -27 I/O 3-10 In / Out 7, 21-22 NC 12 Reset In Resets module operation, pull high for ordinary use. 13 Watchdog In Connect to Vcc = Turns OFF “watchdog” Connect to GND = Turns ON “watchdog” 14 Error LED Out LED drive output. Flashes if Zulu Tx has not received acknowledgment or Zulu Rx not received watchdog. 16 Vcc In Supply voltage 17, 18 TX/RX LEDs Out Active LED output when module is transmitting or receiving RF data packets. 19 TX/RX In Connect to Vcc = Module is a Transmitter Connect to GND = Module is a Receiver 20 Ch Sel In Sets the channel frequency Connect to Vcc = Operates on ch A 869.500 Connect to GND = Operates on ch B 868.133 23 Learn In Connect to momentary switch to GND, when activated places the module into pairing mode. 24, 28 IRQ In/Out In / Out Connect together to enable RF interrupts on chip (mandatory). 29-30 XTAL1-2 In Connect 30MHz XTAL here to drive RF circuit In In Description Antenna Input / Output 50ohm Impedance in Connect to ground Connect to Vcc = I/O1-2 are analogue Connect to GND = I/O1-2 are digital Analogue or digital I/Os 0—Vcc, connect to GND if unused When configured as transmitter: Digital inputs: high Impedance inputs When configured as receiver: Digital outputs: LVCMOS output drive y ar Leave unconnected ta Da DS-ZULUT-1 Direction ZULU Telemetry General Description of Operation Pr Each module can be set to act as a ‘ Transmitter’ or ‘Receiver’ A remote telemetry system is achieved when two modules are paired together, as transmitter (ZuluTx) and receiver (ZuluRx). Each time an input changes on the ZuluTx, it will transmit the status of its inputs to the paired ZuluRx(s). which will set its outputs to follow the ZuluTx Inputs and reply back with an acknowledge signal. Once completed the modules will then go into sleep mode im el Pin Descriptions: Channel Select (pin 20) This sets the operating carrier frequency of the module. This enables separate groups of modules to coexist in the same vicinity without any interference. For operation see page 2. TX / RX (pin 19) When connected to Vcc Zulu is a Transmitter When connected to GND Zulu is a Receiver XTAL1, XTAL2 (pins 29, 30) The Zulu module requires a 30MHz drive crystal to be connected between XTAL1-2 Any standard crystal +/-10ppm ~20pF such as Farnell part no. 184-2247. Note tuning capacitors are not required. Learn / Erase (pin 23) Each transmitter has a unique identity. A receiver can ‘sync’ with a transmitter so that the receiver outputs will respond to the transmitter inputs. in y ar To Learn: 1. Briefly press the “sync” switch on the receiver 2. Briefly operate any of the transmitter inputs To Erase 1. Hold pin 7 on the receiver to ground for >10seconds. 2. (For completed circuit press learn switch for 10sec) 3. Indication of the process is shown the TX/RX LED. ta Da Tx / Rx LEDs (pins 17, 18) Direct LED drive which operate whenever there is RF activity Tx or Rx Mode Normal operation Learn mode DS-ZULUT-1 TX/Rx LED Description ON Module is transmitting/receiving RF data OFF Flashing at low speed No RF data is being transmitted/received Flashing at high speed 3secs Module is searching for another to pair with. Pairing successful ZULU Telemetry The following descriptions apply to the Zulu Module in TRANSMITTER Mode Pr When configured as a Transmitter the ZULU Module will automatically default to low power sleep mode until any input state change takes place. On receipt of an input state change the ZuluTx will transmit a packet showing the status of all inputs (multiple state changes can take place simultaneously). The ZuluTx will remain “awake” until: 1. The paired ZULU Rx Module has acknowledged, or 2. A timeout value of 4 retry transmissions. (Pin 26 output will then be flashed) im el Analogue / Digital (pin 3) This input configures Input 1-2 to be analogue or Digital inputs. Analogue is enabled when pin is HIGH. Note: this input is read at power up only. in Analogue Inputs (4,5) If enabled each input is 10bit A/D which can accept a voltage between 0 –Vcc. Each input is sampled ten times per second, and the value is averaged before transmission. ZuluTx will transmit whenever there is a change in the detected input voltage of 0.025V If no change of voltage is measured then the ZuluTx will not transmit. A nominal 1uF capacitor is recommended across the analogue inputs in order to prevent noise being read and transmitted. Note: A maximum of three RF packets are sent per second. y ar Digital Inputs High Impedance Inputs, LVCMOS / LVTTL compatible. Can be connected directly to CMOS/TTL logic or switch inputs connected to 0V (active low) A change on the input will cause the ZuluTx to wake, read the inputs and initiate RF transmission. ta Da Watchdog Input (pin 13) The watchdog is designed to enable the ZuluRx to be aware of any potential problems with the RF link to a sync’ed ZuluTx. When activated the ZuluTx will automatically transmit a call in packet a regular basis every 10seconds. Input statuses are not sent as part of the watchdog signal. Note: This pin is only read on power up. Watchdog is only valid on a 1-1 system. RF Fault (pin 26) Direct drive to LED. Each time the ZuluTx transmits the status of its inputs, it expects an acknowledgement from the paired receiver. If this is received then the RF Fault LED is not used. If no acknowledgement is received RF Fault is flashed. DS-ZULUT-1 RF Fault LED Status Description OFF Receiver has acknowledged correctly Flashing at 1Hz No acknowledgment received ZULU Telemetry Transmitter example application circuit Vcc ANT Pr 3 30 4 29 5 28 im el Analogue Inputs GND NC 6 27 7 26 8 Vcc Vcc 25 ZULU-T 9 24 10 23 11 22 12 21 13 20 14 15 NC NC Vcc NC 19 18 TX LED 17 y ar Vcc 16 in 10K RF Fault XTAL RX LED SWITCH INPUTS 3 - 7 Notes: Watchdog is ON Channel selected is 869.500 Analogue inputs active SWITCH INPUTS 8 - 10 ta Da DS-ZULUT-1 ZULU Telemetry The following descriptions apply to the Zulu module in RECEIVER mode Analogue outputs (pin 4, 5) If enabled the ZuluRx outputs PWM signal. The PWM may be used directly (e.g. for motor control) The PWM signal is a proportional digital output representing the analogue input. Pr If the analogue input is 0V then the PWM output will be ‘0’ If the analogue input is 1/2Vcc then the PWM output will be a square wave with 50% duty cycle, (operating at approx 23KHz) If the analogue input is Vcc then the PWM output will be ’1’ im el In order to re-create an analogue signal (representing the analogue input at the transmitter) the output should be fed through an RC network as above. in y ar Digital outputs CMOS / TTL compatible outputs. Can be connected directly to CMOS/TTL logic or drive DS-ZULUT-1 ta Da Analogue / Digital (pin 3) This input configures output 1-2 to be analogue or digital outputs. Note: this input is read at power up only. Watchdog Input (pin 13) When activated the ZuluRx module will automatically expect to receive a watchdog signal from the ZuluTx on a regular basis (10seconds) If it has failed to receive this within a 30second period it will assert drop all outputs and flash the RF fault output RF fault Direct drive to LED. Flashes when watchdog fails. RF fault status Description OFF ZuluRx has received watchdog correctly Flashing at 2Hz No watchdog received OFF watchdog is inactive ZULU Telemetry Receiver Application Circuit Vcc ANT Pr GND Analogue Outputs 3 30 4 29 5 28 6 27 im el NC 26 7 8 25 ZULU-T 24 10 23 11 22 12 21 10K 13 20 RF Fault 14 19 15 18 Vcc Vcc 16 Notes: Watchdog is ON Channel Selected is 869.500 Analogue outputs active LEARN NC Vcc NC TX LED 17 RX LED y ar LED OUTPUTS 3 - 7 in 9 Vcc XTAL LED OUTPUTS 8 - 10 ta Da DS-ZULUT-1 ZULU Telemetry Application Example ONE to ONE Pr im el In this application the outputs at the receiver will track the inputs at the transmitter. The receiver outputs are acknowledged back to the transmitter. If required the Watchdog can be enabled to inform the user if the RF system has a fault. in y ar ta Da DS-ZULUT-1 ZULU Telemetry Mechanical Dimensions Pr im el in y ar Range ta Da The antenna choice and position directly controls the system range. Keep it clear of other metal in the system. The best position by far, is protruding vertically from the top of the product. This is often not desirable for practical reasons and thus a compromise may be needed. Note that the space around the antenna is as important as the antenna itself. All radio systems are dependant on a radio signal being received through airspace. The range quoted is the optimal in direct line of sight without obstacles and in good atmospheric conditions. Range is affected by many things, for example local environmental conditions, atmospheric conditions, interference from other radio transmitters. For evaluating the local environment please see our RF Meter (DS006) In very worse case applications the range quoted may be reduced dramatically below the optimal range stated. Recommended Antenna 868MHz The BEAD Antenna provides a Miniature PCB mounting solution where performance is required from a small space . Available as straight or 90 degree mount this antenna is a general purpose omni-directional. Please see Datasheet ANT-BEAD-868 DS-ZULUT-1 ZULU Telemetry Technical Specifications Absolute Maximums: Temperature Range: Range Storage –50 to +125oC. Min Max Units 4.0 V 5.8 V VDD + V +5 dBm Max Units 1.8 3.6 V -40 +85 Pr Parameter Supply Voltage Voltage on any Input VDD >2.2V im el VDD <2.2V Max Input power (thro Antenna) Supply Voltage Zulu Tx Supply Current: When Transmitting When sleeping Min Zulu Rx Supply Current: Min Operating Frequency 1 Deviation Operating Temperature C 85 mA 1 uA 18.5 mA Typical Max 869.50 0868.1 33 Operating Frequency 2 o ta Da AC Characteristics Parameter Typical y ar Operating Temperature in Parameter MHz MHz kHz 50 -40 Units +85 o C Zulu Tx Output Power +20 dBm Zulu Tx—Rx FSK Raw RF Data Rate 9.6 Kbps Zulu Rx Sensitivity DS-ZULUT-1 -121 dBm ZULU Telemetry System Characteristics Parameter Min Time from Zulu Tx input activation time to Zulu RX output Activation Pr Time from Zulu Tx input activation time to Zulu RX output Relaxing Typical Max Units 28 ms 28 ms im el in y ar ta Da DS-ZULUT-1 ZULU Telemetry ZuluT Evaluation Board Pr The ZULU EVAL Boards provide a ready made platform which can be used for evaluation or complete projects. These boards demonstrate the capabilities of ZULU Modules.. • • 10 Digital Channels • 2 Analogue Channels (PWM) Serial Output RS232 & USB Watchdog Feature in • im el Features • Provides a Radio Link with; Direct Antenna Connection • 9-12Vdc Power in Terminal • LED Indication of • Power • Transmit / Receiver • RF Error y ar • ta Da The Evaluation boards are sold as a TX and RX PCB pair, ready for component use. DS-ZULUT-1 Part No Description ZULU-EVALT Tx and RX PCB Pair PSU-12V1A-UK Power Supply 12V 100mA ZULU Telemetry ZuluT Evaluation Board Configuration Pr im el Overview When paired together the outputs of the receiver will follow the inputs at the transmitter The serial outputs also provide data from the receiver in To get up an running complete the following; 1. Set the jumper links as below 2. Screw in Antenna 3. Apply power 4. Pair together the receiver and transmitter board y ar Jumper Links Note that the Jumper links are read on Power up only Name When Fitted When Open J3 A/D I/O 1 & 2 are analogue operation I/O 1 & 2 are set to Digital operation J3 Channel Select Zulu operates on Channel A J4 TX/ RX Select J4 (Transmitter) Watchdog Enable J4 PWM Enable (Receiver) LK1-LK4 LK5 (Receiver) DS-ZULUT-1 Zulu set as Transmitter Watchdog enabled Enables PWM Output Comms Select All links from Centre to USB All links from Centre to RS232 PWM Supply Vcc: PWM is powered from Vcc VSUPPLY: PWM is powered from incoming V supply at TB1 ta Da Reference Zulu operates on Channel B Zulu set as Receiver Watchdog Disabled Output’s 1& 2 set to Digital N/A ZULU Telemetry Pairing Process In order to pair together a Transmitter and receiver, 1. On the Receiver Briefly press the Receiver ‘Sync Button’ 2. Briefly operate any of the transmitter buttons For all other operation please refer to the ZULU Module operation Pr Analogue in / PWM Out im el When using the analogue RF link, by turning the potentiometer VR1 or VR2, outputs 1 and 2 at the receiver will vary between 0 and 100% PWM, the EVAL-T board has these outpus connected to LED’s 1 and 2 which will ‘dim’ their brightness with the adjustment of the transmitter VR1 and 2 . Serial Data Output in The ZULUEVAL-T Receiver board provides a serial data output on both the RS232 and USB outputs each time a valid datapacket is received. The serial data output is to the following configuration Baud Rate: 19200 Data bits: 8 Stop Bits: 1 Parity: none Handshaking: RTS/CTS y ar ta Da DS-ZULUT-1 ZULU Telemetry Zulu evaluation board receiver schematic Pr im el in y ar ta Da DS-ZULUT-1 ZULU Telemetry Zulu evaluation board transmitter PCB layout Pr im el in y ar ta Da DS-ZULUT-1 ZULU Telemetry Reader Response It is our intention to provide you with the best documentation possible to ensure successful use of your RF Solutions product. If you wish to provide your comments on organization, clarity, subject matter, and ways in which our documentation can better serve you, please email us your comments to the Technical Publications Manager Application: Would you like a reply? Y / N Datasheet: DS-ZULUT-1 Questions: 1. What are the best features of this document? 2. How does this document meet your hardware and software development needs? 3. Do you find the organization of this document easy to follow? If not, why? 4. What additions to the document do you think would enhance the structure and subject? 5. What deletions from the document could be made without affecting the usefulness? 6. Is there any incorrect or misleading information (what and where)? 7. How would you improve this document? RF Solutions Ltd. Recycling Notice Meets the following EC Directives: DO NOT Discard with normal waste, please recycle. ROHS Directive 2002/95/EC Specifies certain limits for hazardous substances. WEEE Directive 2002/96/EC Waste electrical & electronic equipment. This product must be disposed of through a licensed WEEE collection point. RF Solutions Ltd., fulfils its WEEE obligations by membership of an approved compliance scheme. R F Solutions Ltd., Unit 21, Cliffe Industrial Estate, Lewes, E. Sussex. BN8 6JL. England. Email : [email protected] http://www.rfsolutions.co.uk Tel Sales: 01273 898 020 Tel Technical: 01273 898 007 Tel Gen Enq: 01273 898 000 Whilst the information in this document is believed to be correct at the time of issue, RF Solutions Ltd does not accept any liability whatsoever for its accuracy, adequacy or completeness. No express or implied warranty or representation is given relating to the information contained in this document. RF Solutions Ltd reserves the right to make changes and improvements to the product(s) described herein without notice. Buyers and other users should determine for themselves the suitability of any such information or products for their own particular requirements or specification(s). RF Solutions Ltd shall not be liable for any loss or damage caused as a result of user’s own determination of how to deploy or use RF Solutions Ltd’s products. Use of RF Solutions Ltd products or components in life support and/or safety applications is not authorised except with express written approval. No licences are created, implicitly or otherwise, under any of RF Solutions Ltd’s intellectual property rights. Liability for loss or damage resulting or caused by reliance on the information contained herein or from the use of the product (including liability resulting from negligence or where RF Solutions Ltd was aware of the possibility of such loss or damage arising) is excluded. This will not operate to limit or restrict RF Solutions Ltd’s liability for death or personal injury resulting from its negligence.