features ? low-cost embedded control networking chip for use inside machines and for extending control networks to high-performance sensor networks ? miniaturized form factor fts into almost every sensor and actuator ? extensible architecture for seamless integration with lonworks? control networks and the internet ? self-organizing feature confgures the network without special tools or skilled labor ? high speed deterministic operation ( 25ms response time) ? 312.5kbps network transmission speed ? polarity insensitive, free topology, twisted pair wiring ? link power allows sending communication and power over same pair of wires ? robust performance ideal for industrial and consumer products and applications including automotive, buildings, ofce machines, and transportation ? exceptional data integrity with forward error correction and 18 bit packet crc ? exceptionally high common mode noise and interference immunity ? network pins esd protection to over 8kv hbm ? -40c to +85c operating temperature range ? 20 pin qfn 5mm x 5mm package ? rohs-compliant introduction the pyxos platform is the embedded control networking platform introduced by echelon for stand-alone or lonworks extending networking applications inside machines and in high-performance systems such as sensor and actuator i/o busses. pyxos embedded control networks reduce product installation, warranty, and life-cycle costs. pyxos self-organizing networks reduce installation costs and equipment assembly time by eliminating the need to use special tools or skilled labor for network confguration. this minimizes material and labor costs. the remote diagnostics aforded by the pyxos platform enable new features that let manufacturers access low-level data from sensors and actuators, such as process efciency and energy usage. employing these features for preventive and predictive maintenance provides reduced life-cycle costs and improved customer service. pyxos? ft network chip 11500r www.echelon.com ?
the pyxos ft network chip embeds both the protocol for a pyxos platform and the transceiver for communicating on the pyxos network. with the networking protocol implemented inside the chip, only application development is left to the user. the chip is a small 5mm x 5mm sized one that fts into virtually any sensor or actuator. the chip can be connected directly to digital i/o without a microcontroller, making for an ultra- compact smart device. alternately, the chips serial peripheral interface (spi) port can be interfaced with a wide variety of low-cost microcontrollers to accommodate more complex i/o requirements. network architecture and components pyxos ft network consists of up to 32 pyxos points embedded inside sensors and actuators, and a pyxos pilot to interface with the outside world. points (figure 2) can either be unhosted (without a microcontroller; with only digital i/os) or hosted (with a microcontroller). pilots (figure 3) need a microcontroller and can either be stand-alone (not connected to any external network) or networked (connected to a higher-level external network e.g., lonworks to communicate with the outside world). high speed deterministic response time a pyxos ft network operates at 312.5 kilobits per second using a deterministic signaling method by which all 32 points in the system are scanned every 25 milliseconds (proportionally faster with ? fewer points in the system). this rate of speed allows pyxos ft networks to be used for closed-loop controls in process and industrial applications, as well as sensing and control applications that require fast response time. potential applications include: ? vehicular controls ? fault monitors ? propulsion controls ? hvac systems ? lighting systems ? burner and boiler controls ? security and fre/life ? elevator cab and foor call ? safety devices ? controls ? ofce automation equipment advanced noise immunity four diferent network coupling options are available to cover a wide variety of application environments. for applications within an enclosure, the diferential receiver in the pyxos ft ic provides rail- to-rail common mode range and may be connected directly to the network with no additional components. for network applications where ac mains based common mode noise may be tens of volts, a simple 4 component coupling circuit provides +/-40v 50/60hz common mode range (far better than typical rs-485 transceivers). for extremely harsh noise environments a transformer coupled option provides a common mode range of 277vac at 50/60hz and >50vpp immunity to higher frequency common mode noise - passing the highest level of en61000-4-6 conducted rf immunity. free topology wiring and link power the pyxos ft network sends both power and data on the same wire pair, a feature known as link power. link power eliminates the need for an additional pair of power wires and interface terminals, further reducing the cost, size, and complexity of pyxos ft points. pyxos ft networks support free topology wiring architecture that allows network cabling in star, loop, daisy chain or bus topology or any combination of these. free topology wiring reduces the time and expense of node installation by allowing the wiring to be installed in the most expeditious and cost-efective manner. seamless integration with outside world control information gathered from pyxos ft points is disseminated by a pyxos ft pilot to programmable logic controllers (plcs), data gathering panels, host processors, lonworks control networks, the internet, and beyond. the published api makes it easy to interface with the pyxos pilot. the pyxos api uses the same data type defnitions as those developed for lonworks networks, making integration with lonworks networks seamless. figure 1. pyxos ft transceiver block diagram www.echelon.com
block diagrams figure 3. example pyxos pilot figure 2. example pyxos point ? www.echelon.com
pin confguration ? pad layout the center pin on the chip bottom is connected to ground. see the pyxos data book for further details on pad layout and solder stencil mask layout. name pin number type pin description cs~/ dio2 1 digital i/o chip select input or dio2 int~/ dio3 2 digital i/o interrupt output or dio3 sclk/ di4 3 digital in spi clock input or di4 mosi/ dio0 4 digital i/o spi input or dio0 miso/ dio1 5 digital i/o spi output or dio1 cout 6 digital out clock output/tri-state gnd 7 ground ground xin 8 osc in crystal oscillator in xout 9 osc out crystal oscillator out gnd 10 ground ground vbias 11 analog out network bias voltage output vdd3 12 power 3.3v power net_b 13 analog i/o network tx/rx gnd 14 ground ground net_a 15 analog i/o network tx/rx vdd3 16 power 3.3v power gnd 17 ground ground gnd 18 ground ground rst~ 19 digital i/o reset input/output join/md 20 digital in join/mode pin input www.echelon.com
package diagrams ? www.echelon.com
specifcations features description network connections polarity-insensitive protocol deterministic tdma protocol with automatic retries on crc error response time (reading and writing 25ms scan time for up to 32 points. scan time is proportionally faster two 4-byte values in each scan) with less pyxos points, e.g., 1.8ms for two pyxos points in the system data integrity forward error correction of up to 2 bit errors per packet; 18 bit packet crc mac id built-in installation self-organizing network with automatic, hardwired, and manual service- pin methods maximum pyxos points per pyxos pilot 32 transmission speed 312.5 kilobits per second, fxed polling cycle pyxos network variables (pnvs) 128 four-byte pnvs per pyxos point. larger size pnvs can be defned per hosted pyxos point within total memory size available lonworks network variables per pyxos pilot 62 when using shortstack, 4096 when using mip network wiring unshielded cat-5 24awg (0.5mm) and belden 8471 16awg (1.3mm) twisted pair wire; see junction box and wiring guidelines application note for cable details network length in free topology free topology (single termination): 100m (328 feet) maximum total wire bus topology (double termination): 400m (1312 feet) maximum; 0.3m (1 foot) maximum stub lengths link power supports 24vac or 24vdc link power with optional external components; reference designs provided for both switching and linear power supplies application output current: up to 100ma @ 3.3v dc coupling options direct connect (for applications within a single enclosure) non-isolated/grounded non-isolated/floating transformer-isolated (very high common mode and interference immunity) emi designed to comply with fcc part 15 level a and en55022 level a esd designed to comply with 61000-4-2 level 4 (contact - 8kv; air - 15kv) esd human body model (mil-std-883) 8kv (for pins net_a and net_b) radiated electromagnetic susceptibility designed to comply with 61000-4-3 level 3 (10vrms) fast transient/burst immunity designed to comply with 61000-4-4 level 4 (2kv) surge immunity designed to comply with 61000-4-5 level 3 (2kv) conducted rf immunity designed to comply with 61000-4-6 level 3 (10vrms) common mode range (0 C 60hz) 277vrms with transformer-isolated coupling +/-40v with non-isolated/grounded coupling i/o 4 digital i/os and 1 digital input without a microcontroller, 8ma drive, 5v tolerant for leds, digital i/o, and transistors pyxos host microcontroller interface spi (serial peripheral interface) package 20 pin qfn 5mm x 5mm package operating voltage 3.3v 10% operating temperature -40oc to +85oc ? www.echelon.com
www.echelon.com ? ordering information echelon product echelon model number pyxos ft communication ic 11500r-300 (dry pack of five tubes) 11500r-5000 (tape and reel package) pyxos ft communication ic samples (qty 5) 11500r-es (includes samples of network isolation coupling transformers) pyxos ft evaluation kit 11000r-10-1p non-echelon product model number network isolation coupling transformer* tms80040cs switching power supply transformer* tms60563cs * available from: transtek magnetics 1900 w. grant road tuscon, az, usa 85745 (800) 378 0015 copyright ? 2005-2006, echelon corporation. echelon, lon, lonworks, lonmark, lonbuilder, nodebuilder, lonmanager, lontalk, lonusers, lonpoint, digital home, neuron, 3120, 3150, lns, i.lon, lonworld, shortstack, panoramix, lonmaker, the echelon logo, and the lonusers logo are trademarks of echelon corporation registered in the united states and other countries. pyxos, lonlink, lonresponse, lonsupport, lonews, open systems alliance, openldv, powered by echelon, lns powered by echelon, panoramix powered by echelon, lonworks powered by echelon, networked energy services powered by echelon, nes powered by echelon, and thinking inside the box are trademarks of echelon corporation. other trademarks belong to their respective holders. disclaimer neuron chips, free topology twisted pair transceiver modules, and other oem products were not designed for use in equipment or systems which involve danger to human health or safety or a risk of property damage and echelon assumes no responsibility or liability for use of the neuron chips or free topology twisted pair transceiver modules in such applications. echelon makes and you receive no warranties or conditions, express, implied, statutory or in any communication with you, and echelon specifically disclaims any implied warranty of merchantability or fitness for a particular purpose. 003-0406-04
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