the copyright and authority for the interpretation of the products are reserved by mornsun tdx12p485h 2013.03.19-a/0 page 1 of 3 dual high speed h-485 isolation transceiver TD312P485H(3.3v power supply) td512p485h(5.0v power supply) part number system t312 p485h d port signaltype packagetype channelnumber power distribution output power input digital bus product type rate features l baud rate high up to115200bps l connect up to 32 nodes on one bus l 2500vdc isolation voltage (input and output) l integrated high efficiency isolated dc/dc converter l operating temperature range: -40 ~ +85 l esd protection, perfect emc recommend circuit general description rs485 interface power integrated isolated module TD312P485H/td512p485h series are transceiver isolation module with integrated power isolation, electrical isolation, and rs-485 interface bus protector. it has two way independent of rs485 network function.products can be easily embedded in the user equipment, achieve function of rs-485 network connection. the isolation rs - 485 circuits of using a piece of power isolation module, six road light coupling and 2 rs - 485 transceivers and device is only need to adopt a rs485 isolation module now .simplify the customers on the isolation requirements of the design. selection guide model power input TD312P485H 3.17v~3.45v td512p485h 4.75v~5.25v electrical characteristics static current TD312P485H 50ma ,td512p485h 30ma power dissipation 0.4w input of power supply send current td31ip485h 121ma ,td51ip485h 80ma serial interface compatible with + 5 v and + 3.3 v uart interface input pin current i txd <2ma ; i rxd <2ma ; i con <5ma output 485 bus interface standard interface rs485, pull-up and pull-down resistor, whose value is 4.7k ,have been set to a/b line. transmission characteristics transmission rate maximum 115200 bps data delay the delay time from the receiving data switch to the send data : 30 s(min), 100 s(max). the number of nodes connect up to 32 nodes on one bus transceiver control contrary to common 485 transceiver control level control input output con txd a b line state 0 1 1 0 normal sending status 0 0 0 1 normal control input output con a-b rxd 1 0.2v 1 truth table receiving status 1 -0.2v 0 isolation characteristics electrical isolation two-port isolation(input and output) isolation voltage 2.5kvdc(tested for 1minute and leakage current < 5ma, humidity <95%)
the copyright and authority for the interpretation of the products are reserved by mornsun tdx12p485h 2013.03.19-a/0 page 2 of 3 emc specifications ce cispr22/en55022 class a external circuit refer to figure 1- emi re cispr22/en55022 class a esd iec/en61000-4-2 contact 4kv perf. criteria b rs iec/en61000-4-3 10v/m perf. criteria a iec/en61000-4-4 power port 2kv perf. criteria b external circuit refer to figure 1- eft iec/en61000-4-4 signal port 1kv perf. criteria b external circuit refer to figure 1- iec/en61000-4-5 power port 1kv/2kv perf.criteria b external circuit refer to figure 1- surge iec/en61000-4-5 signal port 4kv/6kv perf. criteria b external circuit refer to figure 1- ems cs iec/en61000-4-6 3 vr.m.s perf. criteria a other characteristics operating temperature:-40~+85 environmental temperature transport and storage temperature: -50~+105 size 31.8*20.3*9.5(mm) weight 11 g application environment no dust, fierce shocking, impulsion and corrosive gas note: 1. all specifications measured at ta=25 c, humidity<75%, nominal input voltage and rated output load unless otherwise specified. 2. all specifications stated in this datasheet are subject to the above listed models only. for specifications of non- standard models, please contact our technical support team. emc recommended circuit gnd vcc txd1 l1 rxd1 con1 vo gnd txd2 rxd2 con2 vo 1 2 3 4 5 9 10 11 12 a1 b1 rgnd vcc a2 b2 rgnd 24 23 22 21 20 16 15 14 13 tvs1c1 c2 c3 gdt1 r3 r2 tvs4 tvs3 tvs2 r4 tvs5 r5 tvs6 tvs7 gdt2 c4 r1 c5 c6 c7 c8 tdx12p485h ( figure 1 ) recommended external circuit parameters: model TD312P485H td512p485h c1 220uf/10v(electrolytic capacitor) tvs1 smcj5.0a smcj6.5a c2,c3 1 /25v l1 10 h c4 1000pf/2000v r1 1m tvs2,tvs3 tvs5,tvs6 smbj15ca tvs4,tvs7 smbj10ca r2,r3,r4,r5 10 /2w(wire-wound resistor) c5,c6,c7,c8 100pf/100v gdt1,gdt2 b3d090l-c
the copyright and authority for the interpretation of the products are reserved by mornsun tdx12p485h 2013.03.19-a/0 page 3 of 3 typical applications circuit diagram txd1 rxd1 con1 txd2 rxd2 con2 mcu vcc vcc 1 2 3 4 5 24 23 22 21 20 1 10 11 15 14 a2 b2 b1 a1 485 bus 485 bus vcc gnd txd1 rxd1 con1 vcc gnd txd2 rxd2 con2 note:1 pin and 24 pin are internal connected,23 pin and 2 pin are internal connected. application note 1. please read the user manual carefully before using. if any question please contact our technical support department. 2. please do not use this product in hazardous area. 3. to avoid invalid explosion protection function, or any failure, users disassemble this product is forbidden. after service 1. products are carefully inspected and quality control during production and before shipment. if they operated abnormally or there were anything wrong, please contact our agent where purchased or mornsun fae as soon as possible. 2. mornsun warranty our product for 3 years from manufacturing date. during this peroid, mornsun will repair or replace the product if product was found to have manufacturing defect. application guide see the communication interface product application guide. note: 1. all specifications measured at ta=25 c, humidity<75%, nominal input voltage and rated output load unless otherwise specified. 2. in this datasheet, all the test setup and methods are based on our corporate standards. 3. all characteristics are meant for listed model, non-standard models may perform differently, you can contact mornsun fae for more details. 4. contact us for your specific requirement. 5. specifications are subject to change without prior notice. mornsun science & technology co.,ltd. address: no. 5, kehui st. 1, kehui development center, science ave., guangzhou science city, luogang district, guangzhou,p.r.china. tel: 86-20-38601850 fax:86-20-38601272 e-mail: info@mornsun.cn http://www.mornsun-power.com outline dimensions, recommended footprint & packaging
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