NI PCI-6509 Digital I/O Interface

Product Details

The NI 6509 features digital filtering, programmable power-up states, change detection, and a watchdog timer.

Digital Filtering

You can use the digital filtering option available on the NI 6509 to eliminate glitches on input data. When used with change detection, digital filtering can also reduce the number of changes to examine and process.

You can configure the digital input lines to pass through a digital filter and control the timing interval the filter uses. The filter blocks pulses that are shorter than half of the specified timing interval and passes pulses that are longer than the specified interval. Intermediate-length pulses—pulses longer than half of the interval but less than the interval—may or may not pass the filter.

You can enable digital filtering on as many input lines as necessary for your application. All filtered lines share the same timing interval, which ranges from 400 ns to 200 ms on the NI PCI/PXI-6509. The PCIe-6509 supports only three timing intervals: 160 ns, 10.24 ms, and 5.12 ms.

Specifications

Power Requirements

Current draw from bus during no-load condition:

NI PCI/PXI-6509 :

375 mA on +3.3 VDC, typical;

250 mA on +5 VDC, typical

PCIe-6509 :

550 mA on +3.3 VDC, typical;

20 mA on +12 VDC, typical

+5 V power available

at I/O connector (pins 49 and 99): +4.0 V to +5.25 V; 1A, maximum

Digital I/O

Number of channels: 96 I/O

Compatibility: TTL Schmitt Trigger/CMOS, single-ended GND referenced

Power-on state: Input pulled up or down (software-selectable), output 1 or 0

Data transfers: Interrupts, programmed I/O

I/O connector: 100-pin female 0.050 series SCSI

Pull resistor:

Pull-up resistor 4.7 kW, typical

Pull-down resistor 47 kW, typical

Input voltage protection: ±20 V on up to two pins, maximum

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