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Product short description:
  • Ten 16-bit counter/timers, TTL
  • Event counter
  • Frequency measurement
  • Quadrature position measurement
  • Pulse-width or periodic rate monitor
  • Watchdog timer with isolated relay output
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Several models with a variety of configurations provide up to ten counter/timer channels for counting events, generating waveform control signals, measuring pulse-widths, periodic rates, or quadrature position and monitoring operations.

Support for internal or external triggering simplifies the synchronization of operations to specific events. Counter functions can use internally generated clocks or an externally supplied clock.

Specifications

Counter/Timers

Counter/timer configuration: AcPC482: Ten 16-bit counters – TTL. Other I/O mixes can be made available as specials.
Clock frequency: 20MHz.
Field I/O: Front panel SCSI-3 connector.
Speed (with 20MHz internal clock):
Maximum output pulse/square wave freq.: 200nS.
Minimum event pulse width: 100nS.
Minimum pulse width measurement: 100nS.
Minimum period measurement: 200nS.
Mode accuracy (with external clocking):
Waveform generation: Period is ±125nS.
Watchdog: Timeout occurs within ±1 clock cycle.
Pulse/period measurement: ±1 clock cycle.
Internal clocks: Programmable 1.25, 2.5, 5, 10 or 20MHz via the counter control register.
External clocks: Supported on a per-counter basis via clock line. Maximum frequency 8MHz.
Interrupts: Supported for watchdog timer time-out, event count complete, pulse width or periodic rate measurement complete, pulse wave complete (one-shot mode), successive waveform generation (continuous).
Triggering/gate: Programmable via register write or external trigger. Minimum pulse width 100nS. Line may be used for gating of counter.
Counter trigger: Interface for triggering counter functions. Input level is TTL or RS422 differential digital.
Counter input: Interface for events and pulse/period measurements. Also triggers load of watchdog timer register.
Level is TTL or RS422 differential digital.
TTL compatibility: VIH = 2.0V and VIL = 0.8V. Inputs are buffered and include 4.7K ohm pull-ups to 5V.
Counter output: Level is TTL or RS422 differential digital.

Digital I/O

I/O channel configuration: 16 bi-directional TTL transceivers. Direction controlled as 16 independent channels.

CompactPCI bus Compliance

Meets PCI spec. V2.2 and PICMG 2.0, R3.0.
Data transfer bus: Slave with 32-bit, 16-bit, and 8-bit data transfer operation.
Interrupts (INTA#): Interrupt A is used to request an interrupt.
Plug-and-Play: The system maps the base address into the PCI bus 32-bit memory space.

Environmental

Operating temperature: 0 to 70°C or -40 to 85°C (E versions).
Storage temperature: -55 to 125°C.
Relative humidity: 5 to 95% non-condensing.
Power: 320mA at 5V, typical.
MTBF: Hours at 25°C, MIL-HDBK-217F, notice 2. AcPC482 1,744,259; AcPC483 1,727,707; AcPC484 1,708,729

  • Ten 16-bit counter/timers
  • Two 16-bit counters can be combined to create one 32-bit counter
  • 16 bi-directional digital I/O
  • 20MHz clock time base
  • Counter/timer functions:
    • Quadrature position measurement
    • Pulse width modulation
    • Watchdog timer
    • Event counting
    • Frequency measurement
    • Period/pulse-width measurement
    • One-shot/repetitive
  • 0 to 70°C or -40 to 85°C (E versions)

Manuals

AcPC482 User Manual (Log in to download the file)

Drawings & Diagrams

  • Compare

    502x Cable Series

    • Communication Signal Cables
    • Wide assortment of ribbon cables
    $75$600
    Select options
  • Compare

    Termination Products

    • DIN rail-mount panels
    • 50 screw terminals on 50-pin connector termination panels
    • 50 screw terminals on SCSI-2 connector termination panels
    • 68 screw terminals on SCSI-3 connector termination panels
    $165$210
    Select options

Additional information

Weight N/A
Part Number

5025-288: SCSI-3 cable connection to 68 screw terminals, 5028-378: SCSI-2 cable connection to 50 screw terminals, 5025-552: 50 screw terminals, ribbon cable connector

  • Description

    Screw terminal panels simplify field signal wiring. A cable connector provides a clean interface to the I/O board or module.

    Many termination panels have a compact footprint and mount neatly on a DIN rail strip. Other panels are designed for mounting directly onto a standard 19-inch computer rack.

    All of Acromag’s I/O boards have a corresponding termination panel. This convenience saves you the time and hassle of finding a compatible panel or crafting your own.

    For more information see modules user manual.

  • Features & Benefits

    • Ten 16-bit counter/timers
    • Two 16-bit counters can be combined to create one 32-bit counter
    • 16 bi-directional digital I/O
    • 20MHz clock time base
    • Counter/timer functions:
      • Quadrature position measurement
      • Pulse width modulation
      • Watchdog timer
      • Event counting
      • Frequency measurement
      • Period/pulse-width measurement
      • One-shot/repetitive
    • 0 to 70°C or -40 to 85°C (E versions)
  • Specs & Data Sheets

    Manuals

    AcPC482 User Manual (Log in to download the file)

    Drawings & Diagrams

  • Accessories

    • Compare

      502x Cable Series

      • Communication Signal Cables
      • Wide assortment of ribbon cables
      $75$600
      Select options
    • Compare

      Termination Products

      • DIN rail-mount panels
      • 50 screw terminals on 50-pin connector termination panels
      • 50 screw terminals on SCSI-2 connector termination panels
      • 68 screw terminals on SCSI-3 connector termination panels
      $165$210
      Select options
  • Additional information

    Additional information

    Weight N/A
    Part Number

    5025-288: SCSI-3 cable connection to 68 screw terminals, 5028-378: SCSI-2 cable connection to 50 screw terminals, 5025-552: 50 screw terminals, ribbon cable connector