National Instruments NI 6509 Manuale utente

USER GUIDE AND SPECIFICATIONS

NI 6509

The NI 6509 is a 96-bit, high-drive digital input/output (I/O) device

for PCI, PXI, and CompactPCI chassis. The NI 6509 features

96 TTL/CMOS-compatible digital I/O lines, 24 mA high-drive output,

a watchdog timer, digital filtering, and programmable power-up states.

Contents

Configuration .......................................................................................... 2

Programming Devices in Software.................................................. 3

Functional Overview............................................................................... 4

Safety Information .................................................................................. 4

Related Documentation........................................................................... 6

Features ................................................................................................... 7

Digital Filtering................................................................................ 7

Digital Filtering Example ......................................................... 8

Programmable Power-Up States...................................................... 8

Change Detection............................................................................. 9

Change Detection Example ...................................................... 9

Watchdog Timer .............................................................................. 10

Digital I/O Connections .......................................................................... 11

Pin Assignments .............................................................................. 11

SH100-100-F Connector........................................................... 11

R1005050 Connector ................................................................ 13

Signal Descriptions .......................................................................... 14

Power Connections ................................................................................. 15

Signal Connections .......................................................................... 15

Protecting Inductive Loads .............................................................. 16

Sinking and Sourcing Examples ...................................................... 17

Driving a Relay <24 mA .......................................................... 17

Driving a Relay >24 mA .......................................................... 18

Driving SSRs ............................................................................ 18

Accessories.............................................................................................. 19

Specifications .......................................................................................... 19

NI 6509 User Guide and Specifications 2 ni.com

Configuration

The NI 6509 device is completely software configurable, so it is not

necessary to set jumpers for I/O configuration.

The PCI-6509 device is fully compliant with the PCI Local Bus

Specification, Revision 2.2, and the PXI-6509 device is fully compliant

with the PXI Hardware Specification, Revision 2.1. The PCI/PXI system

automatically allocates all device resources, including the base address

and interrupt level. The device base address is mapped into PCI memory

space. It is not necessary to perform configuration steps after the system

powers up.

Refer to the application software documentation for configuration

instructions.

After the NI 6509 device and the software are installed, the DAQ device

appears under the Devices and Interfaces branch of the MAX

configuration tree.

If the DAQ device does not appear in MAX, use the following

troubleshooting guidelines.

• Verify that you are using the correct version of NI-DAQ (NI-DAQ 7.1

or later). To download the most recent National Instruments drivers, go

to ni.com/drivers.

• Press <F5> to refresh the MAX window, or close and re-open MAX.

• Reboot the computer.

• Power off and unplug the computer or chassis, and install the device in

a different slot. Refer to the DAQ Getting Started Guide for installation

instructions and safety guidelines.

• NI PCI-6509 devices must be installed into a slot that provides 3.3 V.

Check that the 3.3 V LED (reference designator DS1—located on the

visible edge of the underside of the installed device) is lit. If not, check

that the PC motherboard provides 3.3 V to the PCI bus.

©National Instruments Corporation 3 NI 6509 User Guide and Specifications

Programming Devices in Software

National Instruments measurement devices are packaged with NI-DAQ

driver software, an extensive library of functions and VIs you can call from

your application software, such as LabVIEW or LabWindows™/CVI™, to

program all the features of your NI measurement devices. Driver software

has an application programming interface (API), which is a library of VIs,

functions, classes, attributes, and properties for creating applications for

your device.

NI-DAQ 8.xincludes two NI-DAQ drivers, Traditional NI-DAQ (Legacy)

and NI-DAQmx. Each driver has its own API, hardware configuration, and

software configuration. Refer to the DAQ Getting Started Guide for more

information about the two drivers.

Traditional NI-DAQ (Legacy) and NI-DAQmx each include a collection of

programming examples to help you get started developing an application.

You can modify example code and save it in an application. You can use

examples to develop a new application or add example code to an existing

application.

To locate LabVIEW and LabWindows/CVI examples, open the National

Instruments Example Finder:

• In LabVIEW, select Help»Find Examples.

• In LabWindows/CVI, select Help»NI Example Finder.

Measurement Studio, Visual Basic, and ANSI C examples are in the

following directories:

• NI-DAQmx examples for Measurement Studio-supported languages

are in the following directories:

–MeasurementStudio\VCNET\Examples\NIDaq

–MeasurementStudio\DotNET\Examples\NIDaq

• Traditional NI-DAQ (Legacy) examples for Visual Basic are in the

following two directories:

–NI-DAQ\Examples\Visual Basic with Measurement

Studio directory contains a link to the ActiveX control examples

for use with Measurement Studio

–NI-DAQ\Examples\VBasic directory contains the examples not

associated with Measurement Studio

• NI-DAQmx examples for ANSI C are in the NI-DAQ\Examples\

DAQmx ANSI C Dev directory

• Traditional NI-DAQ (Legacy) examples for ANSI C are in the

NI-DAQ\Examples\VisualC directory

For additional examples, refer to zone.ni.com.

NI 6509 User Guide and Specifications 4 ni.com

Functional Overview

Figure 1 shows the key functional components of the NI 6509 device.

Figure 1. NI 6509 Block Diagram

Safety Information

The following section contains important safety information that you must

follow when installing and using National Instruments DIO devices.

Do not operate the device in a manner not specified in this help file. Misuse

of the DIO device can result in a hazard. You can compromise the safety

protection built into the DIO device if it is damaged in any way. If the DIO

device is damaged, return it to National Instruments for repair.

Do not substitute parts or modify the DIO device except as described in this

help file. Use the DIO device only with the chassis, modules, accessories,

and cables specified in the installation instructions. You must have all

covers and filler panels installed during operation of the DIO device.

Do not operate the DIO device in an explosive atmosphere or where there

may be flammable gases or fumes. If you must operate the DIO device in

such an environment, it must be in a suitably rated enclosure.

Industrial Digital

I/O Control FPGA

DIO Lines

Programmable

Power-Up States

Watchdog Timer

Change

Detection

Digital

Filtering

I/O Connector

96 DIO 96 DIO PCI Bus

Interface

Flash

Memory

Configuration

Control

Data/Control

PCI/PXI/CompactPCI Bus

Port 0

Port 1

Port 2

Port 3

Port 4

Port 5

Port 6

Port 7

Port 8

Port 9

Port 10

Port 11

24 mA DIO

Tranceivers

Data/Control

10 MHz

Clock

©National Instruments Corporation 5 NI 6509 User Guide and Specifications

If you need to clean the DIO device, use a soft, nonmetallic brush. Make

sure that the DIO device is completely dry and free from contaminants

before returning it to service.

Operate the DIO device only at or below Pollution Degree 2. Pollution is

foreign matter in a solid, liquid, or gaseous state that can reduce dielectric

strength or surface resistivity. The following is a description of pollution

degrees:

• Pollution Degree 1 means no pollution or only dry, nonconductive

pollution occurs. The pollution has no influence.

• Pollution Degree 2 means that only nonconductive pollution occurs in

most cases. Occasionally, however, a temporary conductivity caused

by condensation must be expected.

• Pollution Degree 3 means that conductive pollution occurs, or dry,

nonconductive pollution occurs that becomes conductive due to

condensation.

You must insulate signal connections for the maximum voltage for which

the DIO device is rated. Do not exceed the maximum ratings for the DIO

device. Do not install wiring while the DIO device is live with electrical

signals. Do not remove or add connector blocks when power is connected

to the system. Avoid contact between your body and the connector block

signal when hot swapping modules. Remove power from signal lines

before connecting them to or disconnecting them from the DIO device.

Operate the DIO device at or below the measurement category1marked

on the hardware label. Measurement circuits are subjected to working

voltages2and transient stresses (overvoltage) from the circuit to which they

are connected during measurement or test. Installation categories establish

standard impulse withstand voltage levels that commonly occur in

electrical distribution systems. The following is a description of installation

categories:

• Measurement Category I is for measurements performed on circuits

not directly connected to the electrical distribution system referred to

as MAINS3voltage. This category is for measurements of voltages

from specially protected secondary circuits. Such voltage

measurements include signal levels, special equipment, limited-energy

parts of equipment, circuits powered by regulated low-voltage sources,

and electronics.

1 Measurement categories, also referred to as installation categories, are defined in electrical safety standard IEC 61010-1.

2 Working voltage is the highest rms value of an AC or DC voltage that can occur across any particular insulation.

3 MAINS is defined as a hazardous live electrical supply system that powers equipment. Suitably rated measuring circuits may

be connected to the MAINS for measuring purposes.

NI 6509 User Guide and Specifications 6 ni.com

• Measurement Category II is for measurements performed on circuits

directly connected to the electrical distribution system. This category

refers to local-level electrical distribution, such as that provided by a

standard wall outlet (for example, 115 V for U.S. or 230 V for Europe).

Examples of Measurement Category II are measurements performed

on household appliances, portable tools, and similar DIO devices.

• Measurement Category III is for measurements performed in the

building installation at the distribution level. This category refers to

measurements on hard-wired equipment such as equipment in fixed

installations, distribution boards, and circuit breakers. Other examples

are wiring, including cables, bus-bars, junction boxes, switches,

socket-outlets in the fixed installation, and stationary motors with

permanent connections to fixed installations.

• Measurement Category IV is for measurements performed at the

primary electrical supply installation (<1,000 V). Examples include

electricity meters and measurements on primary overcurrent

protection devices and on ripple control units.

Related Documentation

The following documents contain information that you may find helpful as

you use this user guide:

•DAQ Getting Started Guide—This guide describes how to install the

NI-DAQ software, the DAQ device, and how to confirm that the device

is operating properly.

•NI-DAQmx Help—This help file contains information about using

NI-DAQmx to program National Instruments devices. NI-DAQmx

is the software you use to communicate with and control NI DAQ

devices.

•Measurement & Automation Explorer Help for NI-DAQmx—This

help file contains information about configuring and testing DAQ

devices using Measurement & Automation Explorer (MAX) for

NI-DAQmx, and information about special considerations for

operating systems.

•DAQ Assistant Help—This help file contains information about

creating and configuring channels, tasks, and scales using the

DAQ Assistant.

Note You can download these documents from ni.com/manuals.

©National Instruments Corporation 7 NI 6509 User Guide and Specifications

Features

The NI 6509 features digital filtering, programmable power-up states,

change detection, and a watchdog timer.

Digital Filtering

Use the digital filter option available on the NI 6509 input lines to eliminate

glitches on input data. When used with change detection, filtering can also

reduce the number of changes to examine and process.

You can configure the digital input channels to pass through a digital filter,

and you can 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.

Table 1 lists the pulse widths guaranteed to be passed and blocked.

You can enable 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.

Internally, the filter uses two clocks: the sample clock and the filter clock.

The sample clock has a 100 ns period. The filter clock is generated by a

counter and has a period equal to one half of the specified timing interval.

The input signal is sampled on each rising edge of the sample clock, which

is every 100 ns. However, a change in the input signal is recognized only

if it maintains its new state for at least two consecutive rising edges of the

filter clock.

The filter clock is programmable and allows you to control how long a

pulse must last to be recognized. The sample clock provides a fast sample

rate to ensure that input pulses remain constant between filter clocks.

Table 1. NI 6509 Digital Filtering

Filter Interval

Pulse Width Passed Pulse Width Blocked

Low Pulse High Pulse Low Pulse High Pulse

tinterval tinterval tinterval tinterval/2 tinterval/2

NI 6509 User Guide and Specifications 8 ni.com

Digital Filtering Example

Figure 2 shows a filter configuration with an 800 ns filter interval (400 ns

filter clock).

Figure 2. Digital Filtering Example

In periods A and B, the filter blocks the glitches because the external signal

does not remain steadily high from one rising edge of the filter clock to the

next. In period C, the filter passes the transition because the external signal

remains steadily high. Depending on when the transition occurs, the filter

may require up to two filter clocks—one full filter interval—to pass a

transition. The figure shows a rising (0 to 1) transition. The same filtering

applies to falling (1 to 0) transitions.

Programmable Power-Up States

At power-up, the output drives on the NI 6509 are disabled. All lines are

user-configurable for high-impedance input, high output, or low output.

User-configurable power-up states are useful for ensuring that the NI 6509

powers up in a known state.

To use MAX (recommended) to program the power-up states, select

the device and click the Properties button. Refer to the software

documentation for information about how to program the power-up states

using NI-DAQ with LabVIEW or other National Instruments application

development environments (ADEs).

Note The response time of programmable power-up states is 400 ms.

External

Signal

External

Signal

Sampled

Filter

Clock

Sample Clock (100 ns)

Filtered

Signal

HHHHH

HLLHH

©National Instruments Corporation 9 NI 6509 User Guide and Specifications

Change Detection

You can program the NI 6509 to send an interrupt when a change occurs on

any input line.

The NI 6509 can monitor changes on selected input lines or on all input

lines. It can monitor for rising edges (0 to 1), falling edges (1 to 0), or both.

When an input change occurs, the NI 6509 generates an interrupt, and the

NI-DAQ driver then notifies the software.

Note Excessive change detections can affect system performance. Use digital filtering to

minimize the effects of noisy input lines.

The NI 6509 sends a change detection when any one of the changes occurs,

but it does not report which line changed or if the line was rising or falling.

After a change, you can read the input lines to determine the current line

states. The maximum rate of change detection is determined by the

software response time, which varies from system to system.

An overflow bit indicates that an additional rising or falling edge has been

detected before the software could process the previous change.

Refer to the software documentation for information about how to set up

and implement the change detection.

Change Detection Example

Table 2 shows a change detection example for six bits of one port.

Table 2. Change Detection Example

Bit

76543210

Changes to detect — —

Enable rising-edge

detection

yes yes yes yes no no yes no

Enable falling-edge

detection

yes yes yes yes no no no yes

NI 6509 User Guide and Specifications 10 ni.com

This example assumes the following line connections:

• Bits 7, 6, 5, and 4 are connected to data lines from a four-bit TTL

output device. The NI 6509 detects any change in the input data so

you can read the new data value.

• Bit 1 is connected to a limit sensor. The NI 6509 detects rising edges

on the sensor, which correspond to over-limit conditions.

• Bit 0 is connected to a switch. The software can react to any switch

closure, which is represented by a falling edge. If the switch closure is

noisy, enable digital filtering for this line.

In this example, the NI 6509 reports rising edges only on bit 1, falling edges

only on bit 0, and rising and falling edges on bits 7, 6, 5, and 4. The NI 6509

reports no changes for bits 3 and 2. After receiving notification of a change,

you can read the port to determine the current values of all eight lines. You

cannot read the state of any lines that are configured for change detection

until the change detection interrupt occurs.

Watchdog Timer

The watchdog timer is a software configurable feature used to set critical

outputs to safe states in the event of a software failure, a system crash, or

any other loss of communication between the application and the NI 6509.

When the watchdog timer is enabled, if the NI 6509 does not receive

awatchdog reset software command within the time specified for the

watchdog timer, the outputs go to a user-defined safe state and remain in

that state until the watchdog timer is disarmed by the application and new

values are written, the NI 6509 is reset, or the computer is restarted. The

expiration signal that indicates an expired watchdog will continue to assert

until the watchdog is disarmed. After the watchdog timer expires, the

NI 6509 ignores any writes until the watchdog timer is disarmed.

Note When the watchdog timer is enabled and the computer enters a fault condition, ports

that are set to tri-state remain tri-stated and do not go to user-defined safe states.

You can set the watchdog timer timeout period to specify the amount of

time that must elapse before the watchdog timer expires. The counter on the

watchdog timer is configurable up to (232 – 1) × 100 ns (approximately

seven minutes) before it expires.

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