High-Speed Front-End Signal Processing System

• inaccuracy from PC-generated electrical noise
• limited I/O choices because of PC slot limitations
• unpredictable effects from PC-based software and hardware upgrades
• excessive and expensive cabling

For custom interfaces, the DGI Card's Application Program Interface (API) can readily link the user's own C-language data utilization programs with the DGI's real-time database. A Windows API is also available. This Dynamic Link Library (DLL) provides a simple interface for Windows application developers. It can be used by 16-bit Windows 3.1 or Windows 95 applications written in C, C++, and Visual Basic.

• Based on over 40 years' experience in industrial signal conditioning, SPS8000's extensive family of plug-in Conditioner Cards can accommodate virtually every type of sensor input. Exceptional STABILITY and ACCURACY result from
  
  • remotely sensed excitation, allowing long cable runs
    
  • separate amplifier for each input channel, with gain/noise/drift characteristics optimized for a specific input type
    
  • powerful low-pass active filtering and selectable digital smoothing on an individual-channel basis, plus precisely regulated built-in calibration
    
    
• Special "wideband" cards with fixed 100-Hz cutoff filters may be used for measurement of highly dynamic input signals.
  
  

• PARALLEL DSP ARCHITECTURE yields up to 80,000 FINISHED ANSWERS PER SECOND for a four-level SPS8000 rack. With optional auxiliary processing, the throughput can go as high as 150,000 FINISHED ANSWERS PER SECOND. Responses for PROCESS CONTROL are issued within the same scan sequence that acquires and evaluates the data.
  
  
• MULTIPLE, SIMULTANEOUSLY EFFECTIVE SCAN RATES from 1 to 200 milliseconds per channel let the user optimize the available scan bandwith, getting the fastest sampling speed where it's most needed without wasting it on relatively non-dynamic channels and bits.
  
  
• SPS8000 performs real-time digital processing of analog and logic data independently, with NO ASSOCIATED COMPUTER OVERHEAD. Standard DSP functions include
  
  • high-precision IEEE floating-point conversion
    
  • per-channel scaling, linearization, smoothing, taring, and 5-zone limit checking
    
  • real-time math calculations--including max/min, true average, phase angle, and rate of change
    
  • Boolean processing of logic bits, with generation of logic outputs for local real-time annunciation and control
    
  • scaling and clamping of analog outputs for local real-time indication, recording, and control
    
    

• Interchanges between SPS8000 and its host PC take place over the D-NET, a high-speed deterministic 10BASE2 network physically compatible with Thin-Wire Ethernet.
  
  
• SPS8000 communicates with the PC through a special bus conversion board called the Daytronic Gateway Interface (DGI) Card. Installed in the PC, the DGI uses an efficient DUAL-PORT RAM to transfer SPS8000-acquired data directly into the host's memory space with NO DMA INTERRUPTIONS
  
  
• Using "LISTEN-ONLY" DGI Cards, multiple computers can be supported from one SPS8000.
  
  
• I/O servers and device drivers provide fast, seamless interaction between SPS8000 and many popular third-party application programs for data acquisition, graphical display, and process control- including AutoNet™ (Nematron), InTouch™ for Windows and Windows NT (Wonderware®), KineticaRT™, and Windows programs that support DDE. SPS8000 can also be integrated with custom C-language programs and with 16-bit Windows 3.1 or Windows 95 applications written in C, C++, and Visual Basic.
  
  

• All SPS8000 MAINFRAMES are 19" rack mountable. All conditioner, processor, and power-supply resources easily accessible from the front of the mainframe.
  
  
• Dimensions for single-level mainframe are 8.75"H x 19.00"W x 16.75"D; add 5.25" height for each of up to three additional levels.
  
  
• I/O capacity: Up to 80 I/O cards per 4-level system (=up to 640 analog I/O channels or up to 1000 logic I/O ports); dedicated A/D and DSP for every level of twenty cards.
  
  
• Total channel/bit capacity: Up to 1000 data channels per 4-level rack; up to 1000 user-programmable logic bits, plus 7 internal "global" bits for system-wide limit checks.
  
  
• Internal throughput: Up to 20,000 finished answers per second per mainframe level (up to 80,000 for a 4-level rack). This rate is not affected by any data processing the system might be doing. With optional Auxiliary Processor (AUX) Cards, a throughput of up to 150,000 answers per second can be achieved.
  
  
• STAND-ALONE OPERATION made possible by enabling "internal sync" mode.
  
  
• A/D resolution: 16-bit with floating-point math; for all Conditioner Cards, measurement resolution is determined by the user during system calibration.
  
  
• Analog filtering: Multiple low-pass active analog per channel; digital smoothing function per channel with individually selectable quieting factor.
  
  
• Overall accuracy: 0.02% of full scale typical, following calibration by the user.
  
  
• High-speed PC communications compatible with Thin-Wire Ethernet; up to 150,000 channels/second with guarantee of no network collisions.
  
  
• PC-BASED CONFIGURATION SOFTWARE allows easy specifications of all required system setup parameters, which are stored in non-volatile EEPROM.
  
  
• Continuous power range from 90 to 260 V-AC (47-63Hz); maximum amperage varies with mainframe model
  
  
• Operating temperature range: +5 °C to +50 °C (+41 °F to +122 °F)
  
  
• Operating humidity range: 10% to 95%, non condensing