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NDAQ Hardware Components

NDAQ Hardware Components. PC104 stack Enclosure Communication Cabling Power System ???. PC 104 Stack. Processor. A/D. Serial. Interface. Local Storage. Relay. Power. ?. Processor. > 100 MHz processor How slow is ok? possible power savings > 3 serial ports

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NDAQ Hardware Components

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  1. NDAQ Hardware Components • PC104 stack • Enclosure • Communication • Cabling • Power System • ???

  2. PC 104 Stack Processor A/D Serial Interface Local Storage Relay Power ?

  3. Processor • > 100 MHz processor • How slow is ok? • possible power savings • > 3 serial ports • Viper – 5 ports, Prometheus – 4 ports • Ethernet port • USB port • > 16 Digital I/O lines • > 32 MB Flashdisk (solid-state storage) • On-board compact flash (option) • Linux Development • Power < 2 watts • -30o to 70o C

  4. Analog to Digital • > 16 bit resolution • Do we better (@ +.5  15uv/bit) • > 16 single / 8 differential • More channels  Increase power consumption • Software selectable input ranges +10, +5, +2.5, +1, +.5 (Bi-polar / Uni-polar) • > 10 KHz per channel sampling • Is this fast enough for hot-wire probes • Interrupt driven • > 8 digital I/O lines • We need at least one for that rain gauge! • > 12 bit DAC (option) • Provides excitation capability (echo probes, etc) • Power < 2 watts • -30o to 70o C

  5. Serial I/O • > 8 serial ports • RS-232 / RS-422 / RS-485 • Hardware or Software selectable • 100 baud to 115200 baud • Interrupt driven • > 16 byte transmit / receive buffer • Power < .5 watt • -30o to 70o C

  6. Local Storage • Size: vary based on stack usage OHATS: 800 MB / day HVAMS: 20 MB / day (raw data) • Type: hard drive: 30 GB 5 w to 0.1 w (sleep) USB stick: 2 GB CompactFlash: 2 - 4 GB 0.3 w to 6 mw (sleep) • Do we need the capability to use all types?

  7. Relay(optional board) • > 8 channels output, SPST • IR104 has 20 channels! • > 8 channels input, 0 – 10 volt input • Relay max current: 5 amps • Relay max voltage: 50 VDC, 120 VAC • Power < 1 watt (relays off) • -30o to 70o C

  8. Power Supply • Input voltage: 8 – 30 VDC • Output voltage: 5 VDC • Option for 12 VDC, +3.3 VDC ? • Max power: 25 watts • Do we need this much ( min. size based on quick search) • Do we design our own (remember the problems with EVE!) • Battery charging / management • Allow system to be independent from external power • Increase size in enclosure • Efficiency > 85% • -30o to 70o C

  9. Interface • General • one common panel or individual panels per interface • interface part of stack (custom PC-104 board) • lightning / surge protection • power source via interface cabling • Serial • multiple ports per connector  breakout box approach • individual connectors  more real estate needed • A/D • low-pass filter  if so what frequency(s) • Shielding for signals

  10. Communication • Black box it! • design system to allow for variety of communication systems • comms inside or outside enclosure • Options GOES @ 1200 Baud! • large coverage / free use / one-way communication Iridium phone • large coverage / user cost Spread Spectrum • up to 20 miles line-of-sight Cell phone • limited coverage / user cost Wireless Ethernet • limited range What is needed for upcoming project(s) SOFTWARE : Peer-to-Peer issue?

  11. Enclosure • Questions Shape – cylinder, rectangular, ? Material: Plastic, aluminum, ? Size: what goes in the box connector panel size Mounting: FluxPam tripod, Rohn tower, scaffolding tower, ?

  12. Cabling Questions • new connector type size, weatherproof, thread verses snap. • number of pins per cable common cable for serial, A/D extra pins for expansion • multi-port connector or individual breakout box power through cable • in-house or out-of-house construction • what do we do with the old cables

  13. Power System • Overall power consumption • ~5 watts  Viper, Emerald (8 serial), A/D (8 channel), power supply • Monitor / controller location • Located in battery box with intelligence or use PC-104 A/D • Power distribution (12 VDC to 3.3 VDC) • Create a multiple output option • Existing status of power system (EVE) • Do we have enough to do 10 systems (Cupido)

  14. Task Assignments Communication options – John Enclosure options – Kurt Cable options - Kurt Interface options - John PC-104 cards – Steve S. Software issues - ?

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