Document Outline

• Preface
• About this User's Guide
  • What you will learn from this user's guide
  • Conventions in this user's guide
  • Where to find more information
• Introducing the USB-2527
  • Overview: USB-2527 features
  • Software features
• Installing the USB-2527
  • What comes with your USB-2527 shipment?
    • Hardware
    • Optional components
      • PS-9V1AEPS-2500 power supply
      • Cables
    • Signal conditioning accessories
    • Additional documentation
  • Unpacking the USB-2527
  • Installing the software
  • Installing the USB-2527
  • Configuring the hardware
  • Connecting the board for I/O operations
    • Connectors, cables – main I/O connector
    • 68-pin SCSI connector differential and single-ended pin outs (P5)
    • TB-100 terminal board connector to SCSI connector pin out
    • 40-pin header connector pin outs
      • Analog channels pin out (J5 and J6)
      • Digital ports, counters, timers, DACs, triggers, and pacer clocks pin out (J7 and J8)
      • Using C40FF-x cables to obtain 40-pin female connectors
    • Four-channel TC terminal pin out (TB7)
  • Cabling
    • Field wiring and signal termination
  • Using multiple USB-2527s per PC
• Functional Details
  • USB-2527 components
    • SCSI - 68 pin (P5) connector
    • 40-pin headers (J5, J6, J7, J8)
    • 9-slot screw terminal (TB7)
    • External power connector
  • USB-2527 block diagram
  • Synchronous I/O – mixing analog, digital, and counter scanning
  • Analog input
    • Analog input scanning
      • Settling time
      • Example: Analog channel scanning of voltage inputs
      • Example: Analog channel scanning of voltage and temperature inputs
      • Example: Analog and digital scanning, once per scan mode
      • Example: Sampling digital inputs for every analog sample in a scan group
  • Thermocouple input
    • Tips for making accurate temperature measurements
      • Shielding
      • Averaging
  • Analog output
    • Example: Analog channel scanning of voltage inputs and streaming analog outputs
  • Digital I/O
    • Digital input scanning
    • Digital outputs and pattern generation
  • Triggering
    • Hardware analog triggering
      • A note on the hardware analog level trigger and comparator change state
    • Digital triggering
    • Software-based triggering
      • Analog triggering
      • Pattern triggering
      • Counter triggering
    • Stop trigger modes
    • Pre-triggering and post-triggering modes
      • No pre-trigger, post-trigger stop event
      • Fixed pre-trigger with post-trigger stop event
      • No pre-trigger, infinite post-trigger
      • Fixed pre-trigger with infinite post-trigger
  • Counter inputs
    • Mapped channels
    • Counter modes
      • Totalize mode
      • Clear on read mode
      • Stop at the top mode
      • 32-bit or 16-bit
      • Latch on map
      • Gating "on" mode
      • Decrement "on" mode
    • Debounce modes
      • Trigger after stable mode
      • Trigger before stable mode
      • Debounce mode comparisons
    • Encoder mode
      • Maximizing encoder accuracy
      • Connecting the USB-2527 to an encoder
  • Timer outputs
    • Example: Timer outputs
  • Using detection setpoints for output control
    • What are detection setpoints?
    • Setpoint configuration overview
    • Setpoint configuration
      • Set high limit
      • Set low limit
      • Set criteria
      • Set output channel
      • Update modes
      • Set values for output
    • Using the setpoint status register
    • Examples of control outputs
      • Detecting on analog input, DAC, and FIRSTPORTC updates
      • Detection on an analog input, timer output updates
      • Using the hysteresis function
      • Using multiple inputs to control one DAC output
      • Detecting setpoints on a totalizing counter
    • Detection setpoint details
      • Controlling analog, digital, and timer outputs
    • FIRSTPORTC, DAC, or timer update latency
  • Mechanical drawing
• Calibrating the USB-2527
• Specifications
  • Analog input
    • Accuracy
    • Thermocouples
  • Analog outputs
  • Digital input/output
  • Counters
  • Input sequencer
  • Trigger sources and modes
  • Frequency/pulse generators
  • Power consumption
  • External power
  • USB specifications
  • Environmental
  • Mechanical
  • Signal I/O connectors and pin out
    • 68-pin SCSI connector pin outs
    • 40-pin header connector pin outs
      • J5
      • J6
      • J7
      • J8
    • TC connector pin out (TB7)