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Product short description:
  • 24 differential I/O, 16 TTL I/O
  • Four 16-bit counter/timer channels,  six operating modes
  • Change of state and level interrupts
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The PMC424 digital I/O module provides 24 differential input/outputs, 16 TTL input/output channels, and four 16-bit multi-function counter/timers.

The 16 TTL input/output channels can be programmed as an input or an output on a channel basis. The 24 differential input/output channels are programmed as inputs or outputs on an 4-channel port basis. All input channels can be enabled for change of state, low, or high level transition interrupts.

Four 16-bit multifunction counters/timers can be configured for pulse width modulated output, watchdog timer, event counter, frequency measurement, pulse width measurement, period measurement, or one shot pulse output. The four 16-bit counters can also be configured into two 32-bit counter/timers. A conduction-cooled version is also available.

Specifications

Differential Digital I/O

I/O channel configuration: 24 bidirectional non-isolated RS485/422A differential signals. Direction is controlled as a 4-channel group.
Differential driver output voltage with 50 ohm load: 2V minimum, 5V maximum.
Common mode output voltage: 3V maximum:
Minimum input resistance: 12K ohms.
Termination resistors: 120 ohm termination resistor networks are installed in sockets.

TTL Digital I/O

I/O channel configuration: 16 bidirectional TTL (15 for 424R) transceivers with direction controlled independently (shared as counter/timer control signals).
Reset/power-up condition: All channels default to input.

Digital Input

Input voltage range: 0 to 5V DC.
Input signal threshold, low to high: 3.5V typical.
Input signal threshold, high to low: 1.5V typical.
Input response time: 10 nanoseconds, typical.

Digital Output

Output voltage range: 0 to 5V DC.
Output ON current range: -32 to 32mA.
Output pullups: 4.7K ohm socketed resistors.
Turn on time: 10nS.
Turn off time: 10nS.

Input Interrupts

40 channels of interrupts are available for high-to-low, low-to-high, or any change-of-state event type.
Debounce: Selectable for each channel. User-selectable (5.6μS, 50.4μS, 408.8μS, or 3.276mS).

Counter/Timers

Counter/timer configuration: Four 16-bit counters can be configured into two 32-bit counters.
Counter input: Each counter has an INA, INB, and INC port. These TTL input signals control start/stop, reload, event input, external clock, trigger, and up/down operations.
Counter output: Each counter has one output signal. The TTL output is used for waveform output, watchdog active indicator, or 1.6μS pulse upon counter function completion. Programmable as active high or low.
Clock frequencies: Selectable for 20MHz, 10MHz, 5MHz, 2.5MHz, 1.25MHz or external up to 8MHz.
Minimum I/P event: 100nS (debounce disabled).
Minimum pulse measurement: 100nS (debounce disabled).
Minimum period measurement: 200nS (debounce disabled).
Minimum gate/trigger pulse: 100nS (debounce disabled).
Board crystal oscillator: 20MHz.

PMC Compliance

Conforms to PCI Local Bus Specification, Revision 2.2 and CMC/PMC Specification, P1386.1.
4K Memory Space Required: One Base Address Register.
Signaling: 5V Compliant, 3.3V Tolerant.

Environmental

Operating temperature: 0 to 70°C (PMC424 / R) or -40 to 85°C (PMC424E / CC)
Storage temperature: -55 to 105°C.
Relative humidity: 5 to 95% non-condensing.
MTBF: 1,596,123 hrs. at 25°C, MIL-HDBK-217F, notice 2.
Power: 216mA at +5V, typical.

 

  • 0 to 70°C (PMC424 / R) or -40 to 85°C (PMC424E / CC)

Digital I/O

  • 40 digital input/output channels:
    • 24 differential input/outputs
    • 16 TTL input/output channels (15 ch. for 434R)
  • Programmable change of state/level interrupts
  • Input signal filtering debounce logic

Counter/Timer

  • Four 16-bit or two 32-bit counter/timer channels (control lines shared with 16 TTL I/O channels)
  • Six operating modes:
    • Pulse width modulation
    • Watchdog timer
    • Event counter
    • Frequency measurement
    • Pulse width or period measurement
    • One-shot and repetitive one-shot
    • TTL-compatible thresholds
    • Power-up and system reset are failsafe

Manuals

PMC424 User Manual (Log in to download the file)

PCISW-API-LNX (Log in to download the file)
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    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
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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

    • 0 to 70°C (PMC424 / R) or -40 to 85°C (PMC424E / CC)

    Digital I/O

    • 40 digital input/output channels:
      • 24 differential input/outputs
      • 16 TTL input/output channels (15 ch. for 434R)
    • Programmable change of state/level interrupts
    • Input signal filtering debounce logic

    Counter/Timer

    • Four 16-bit or two 32-bit counter/timer channels (control lines shared with 16 TTL I/O channels)
    • Six operating modes:
      • Pulse width modulation
      • Watchdog timer
      • Event counter
      • Frequency measurement
      • Pulse width or period measurement
      • One-shot and repetitive one-shot
      • TTL-compatible thresholds
      • Power-up and system reset are failsafe
  • Specs & Data Sheets

    Manuals

    PMC424 User Manual (Log in to download the file)

  • Software

    PCISW-API-LNX (Log in to download the file)
  • Accessories

    • Compare

      502x Cable Series

      • Communication Signal Cables
      • Wide assortment of ribbon cables
      $40$600
      Select options
    • Compare

      PCISW-API-WIN

      • Support for Acromag XMC, PMC, PCI, CompactPCI cards
      $310
      Select options
    • Compare

      PMCSW-API-VXW: VxWorks Libraries

      • VxWorks function libraries for XMC, PMC, PCI and CompactPCI products (except IP carriers)
      • Supports any CPU target with quick modification.
      • API easily convertible for any operating system
      $835
      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