features ? standard 458mhz (uk), 869mhz (eu) ? available from 160mhz to 915mhz ? 12.5/25khz narrow band multichannel ? data rates up to 19200kbps ? etsi en 300 220 - 1 category 1 high performance level receive r ? point - to - point, point - to - multipoint ? store and forward repeater mode with dual addressing to extend operating range ? mini usb type b, rs232 de9f sockets, rs485 terminal block and spi interfaces ? range test mode applications ? safety - critical wireless applica tions such as social alarms and healthcare monitoring ? high - end security and fire alarms ? lone worker alarms ? industrial/commercial telemetry and telecommand or non - specific srd usage ? in - building environmental monitoring and control technical summary ? size: 8 0 x 86 x 15mm ? operating frequencies: ch0:458 .525, ch1:458.550,ch15:458.900mhz ? supply range: 6v to 16v dc ? current consumption: 280ma tx ? current consumption: 40ma rx ? rf baud rate: 1200, 2400, 4800, 9600 (default), 19200bps. ? user baud rate: 600, 1200, 2400, 4800, 9600, 19200, 38400bps. ? hardware flow control: rts/cts ? modulation: 2, 4 - level gfsk (default) ? transmit power: +27dbm (500mw) nominal ? saw front end filter ? digital rssi ? can be usb powered or external supply the hnm2 radio modem offers a 500mw rf output 19200 data link with rs232, rs485 or usb interface. it meet meets the etsi category 1 high performance receiver specification to be used where the operation of a srd may have inherent safety of human life implications. figure 1: hnm 2 - 458 - 19 high power narrow band category 1 radio modem hartcran house, 231 kenton lane, harrow, middlesex, ha3 8rp, england tel: +44 (0) 20 8909 9595, fax: +44 (0) 20 8909 2233, www.radiometrix.com issue b, 10 november 2017 hnm2 - 458 - 19 preliminary
pcb layout and connections figure 2: hnm2 connections note name function rs232 de9f serial connection dc 2.1mm external dc power input (centre pin +) rs485 2 pin screw terminal rs485 connection usb mini - usb type b connection rf 50 ? sma antenna socket ch.sel manual 16 - channel select he x switch (0 to f) 1 usb en usb jumper link enable 1 rs232 en rs232 jumper link enable 1 rs485 rs485 jumper link enable notes: 1. only one jumper link should be fitted at any time
absolute maximum ratings exceeding the values given below may cause pe rmanent damage to the module. operating temperature - 20 ? ? ? ? ? performance specifications transmitter: (vcc = 6v / temperature = 20 ? c unless stated) general pin min. typ. max. units notes dc supply supply voltage 4.8 6 16 v 6 tx supply current @ 500mw 280ma ma antenna pin impedance 50 ? ? channel spacing 25 khz number of manual channels 16 5 rf rf power output +25 +27 dbm 1 spurious emissions dbm 4 adjacent channel tx power - 36 dbm frequency accuracy - 1.5 0 +1.5 khz 2 fm deviation (peak) khz 3 dynamic timing tx select to full rf 2 2 ms notes: 1. measured into 50 ? resistive load, usb powered reduces output power. 2. total over full supply and temperature range. 3. dependant on data ra te selected 4. meets en300 - 220 5. programmable frequency through at command and selected using on board switch. 6. below 6v the tx output power will decrease. performance specifications receiver: (vcc = 5v / temperature = 20 ? c unless stated) min. typ. max . units notes dc supply supply voltage 4.8 6.0 16 v supply current 40 ma rf/ if rf sensitivity for 1ppm ber - - 117 - dbm 1 rssi range - tbd - db lo leakage, conducted - 54 - 95 db m adjacent channel rejection tbd db blocking tbd db dynamic timing power up to stable data - 2 ms notes: 1. dependant on data rate and modulation used.
received signal strength i ndicator (rssi) the module incorporates a wide range rssi which measures the strength of an incoming signal which can be appended to the incoming data, (atra command see below). variants and ordering information the hnm modem is manufactured in several variants: hnm1 - 169 - 19 500mw eu hnm2 - 433 - 19 - de 500mw germany hnm2 - 458 - 19 500mw uk hnm3 - 869 - 19 4 00mw eu for other variants please contact the factory. other variants can be supplied to individual customer requirements at frequencies from 160mhz to 915mhz
radiometrix ltd hartcran house 231 ke nton lane harrow, middlesex ha3 8rp england tel: +44 (0) 20 8909 9595 fax: +44 (0) 20 8909 2233 sales@radiometrix.com www.radiometrix.com copyright notice this product data sheet is the original work and copyrighted property of radiometrix ltd. reproduc tion in whole or in part must give clear acknowledgement to the copyright owner. limitation of liability the information furnished by radiometrix ltd is believed to be accurate and reliable. radiometrix ltd reserves the right to make changes or improvem ents in the design, specification or manufacture of its subassembly products without notice. radiometrix ltd does not assume any liability arising from the application or use of any product or circuit described herein, nor for any infringements of patents or other rights of third parties which may result from the use of its products. this data sheet neither states nor implies warranty of any kind, including fitness for any particular application. these radio devices may be subject to radio interference and may not function as intended if interference is present. we do not recommend their use for life critical applications. the intrastat commodity code for all our modules is: 8542 6000 r&tte directive after 7 april 2001 the manufacturer can only place finis hed product on the market under the provisions of the r&tte directive. equipment within the scope of the r&tte directive may demonstrate compliance to the essential requirements specified in article 3 of the directive, as appropriate to the particular equi pment. further details are available on the office of communications (ofcom) web site: http://www.ofcom.org.uk/radiocomms/ifi/ information requests ofcom riverside house 2a southwark bridge road london se1 9ha tel: +44 (0)845 456 3000 or 020 7981 3040 f ax: +44 (0)20 7783 4033 information.requests@ofcom.org.uk european radiocommunications office (ero) peblingehus nansensgade 19 dk 1366 copenhagen tel. +45 33896300 fax +45 33896330 ero@ero.dk www.ero.dk
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