National Instruments 6509 User manual

USER GUIDE AND SPECIFICATIONS
NI 6509
This document contains information about using the NI PCI-6509,
NI PXI-6509, and NI PCIe-6509 data acquisition devices with the
NI-DAQmx driver software.
Note For information about using the NI USB-6509 device, refer to the NI USB-6509
User Guide and Specifications document.
The NI 6509 is a 96-bit, high-drive digital input/output (DIO) device.
The NI 6509 features 96 TTL/CMOS-compatible digital I/O lines, 24 mA
high-drive output, digital filtering, programmable power-up states, change
detection, and a watchdog timer.
Contents
Configuration .......................................................................................... 3
Programming Devices in Software .................................................. 4
Functional Overview............................................................................... 5
Safety Information .................................................................................. 6
Electromagnetic Compatibility Guidelines............................................. 8
Related Documentation........................................................................... 9
I/O Connector.......................................................................................... 9
Pin Assignments .............................................................................. 10
SH100-100-F Connector........................................................... 10
R1005050 Connector................................................................ 12
Signal Descriptions .......................................................................... 13
Digital I/O ............................................................................................... 14
Static DIO on NI 6509 Devices ....................................................... 14
I/O Protection................................................................................... 14
I/O Pull-Up/Pull-Down Resistors (NI PCIe-6509 Only)................. 15
Signal Connections .......................................................................... 16
ni.com/manuals
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NI 6509 User Guide and Specifications 2ni.com
Protecting Inductive Loads...............................................................16
Sinking and Sourcing Examples.......................................................17
Driving a Relay d24 mA ..........................................................17
Driving a Relay > 24 mA ..........................................................18
Driving an SSR..........................................................................19
Power Connections ..................................................................................19
+5 V Power Available at I/O Connector ..........................................19
Disk Drive Power Connector (NI PCIe-6509 Only) ........................19
When to Use the Disk Drive Power Connector.........................19
Disk Drive Power Connector Installation .................................20
Industrial DIO Features ...........................................................................20
Digital Filtering ................................................................................20
Digital Filtering Example..........................................................21
Programmable Power-Up States.......................................................22
Change Detection .............................................................................22
Change Detection Example.......................................................23
Watchdog Timer...............................................................................23
Accessories ..............................................................................................24
Specifications...........................................................................................25
Power Requirements.........................................................................25
Digital I/O.........................................................................................25
Digital Logic Levels (NI PCI/PXI-6509).........................................26
Input Signals..............................................................................26
Output Signals (Vcc = 5 V).......................................................26
Digital Logic Levels (NI PCIe-6509)...............................................27
Input Signals..............................................................................27
Output Signals ...........................................................................27
Physical Characteristics....................................................................28
Environmental ..................................................................................28
Operating Environment .............................................................28
Storage Environment.................................................................29
Shock and Vibration (NI PXI-6509 Only) ................................29
Safety................................................................................................29
Electromagnetic Compatibility.........................................................30
CE Compliance.................................................................................30
Online Product Certification.............................................................30
Environmental Management ............................................................31
Where to Go for Support .........................................................................32

©National Instruments Corporation 3 NI 6509 User Guide and Specifications
Configuration
The NI PCI/PXI/PCIe-6509 devices are fully compliant with the PCI Local
Bus Specification Revision 2.2, the PXI Hardware Specification
Revision 2.1, and the PCI Express Electromechanical Specification
Revision 1.1, respectively. The PCI/PXI/PCIe 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.
Before installing the NI 6509 device, you must install the software you plan
to use with the device. Refer to the software documentation for
configuration instructions.
After you install the software and the NI 6509 device, the device appears
under the Devices and Interfaces branch of the Measurement &
Automation Explorer (MAX) configuration tree.
If the NI 6509 does not appear in MAX, use the following troubleshooting
guidelines:
•VerifythatyouareusingthecorrectversionoftheNI-DAQmxdriver
software (version 7.1 or later for the NI PCI/PXI-6509 and version 9.2
or later for the NI PCIe-6509). To download the most recent National
Instruments drivers, visit the NI Web site at ni.com and select
Download Software»Drivers and Updates.
•Press<F5>torefreshtheMAXwindow,orcloseandreopenMAX.
•Restartthecomputer.
•Poweroffandunplugthecomputerorchassis,andinstallthedevice
in a different slot. Refer to the DAQ Getting Started guides for
installation instructions and safety guidelines.
•(NI PCI-6509 only) You must install the NI PCI-6509 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.

NI 6509 User Guide and Specifications 4ni.com
Programming Devices in Software
NI measurement devices are packaged with the NI-DAQmx 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. NI-DAQmx
provides an application programming interface (API), which is a library of
VIs, functions, classes, attributes, and properties for creating applications
for your device. NI-DAQmx also includes 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. Refer to the DAQ Getting Started guides for more information
about NI-DAQmx.
The NI PCI/PXI-6509 uses NI-DAQmx 7.1 or later, whereas the
NI PCIe-6509 requires NI-DAQmx 9.2 or later.
To locate LabVIEW and LabWindows/CVI examples, open the
NI Example Finder:
•InLabVIEW,selectHelp»Find Examples.
•InLabWindows/CVI,selectHelp»NI Example Finder.
Measurement Studio, Visual Basic, and ANSI C examples are in the
following directories:
•NI-DAQmxexamplesforMeasurementStudio-supportedlanguages
are in the following directories:
–MeasurementStudio\VCNET\Examples\NIDaq
–MeasurementStudio\DotNET\Examples\NIDaq
•NI-DAQmxexamplesforANSICareintheNI-DAQ\Examples\
DAQmx ANSI C Dev directory
For additional examples, refer to the NI Developer Zone at zone.ni.com.

©National Instruments Corporation 5 NI 6509 User Guide and Specifications
Functional Overview
Figure 1 shows the key functional components of the NI PCI/PXI-6509.
Figure 1. NI PCI/PXI-6509 Block Diagram
Figure 2 shows the key functional components of the NI PCIe-6509.
Figure 2. NI PCIe-6509 Block Diagram
Industrial Digital
I/O Control FPGA
I/O Connector
96 DIO 96 DIO
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
Transceivers
Data/Control
DIO Lines
Programmable
Power-Up States
Watchdog Timer
Digital Filtering
Change Detection
PCI Bus
Interface
10 MHz
Clock
Digital I/O
NI ASIC
Digital I/O
NI ASIC
DIO Lines
NI ASIC
48 DIO48 DIO
48 DIO 48 DIO
I/O Connector
PCI Express Bus
Watchdog Timer Data/Control
Programmable
Power-Up States
Digital Filtering
Change Detection EEPROM
100 MHz
Clock
DIO Lines
NI ASIC
Programmable
Power-Up States
Watchdog Timer
Digital Filtering
Change Detection
Data/Control

NI 6509 User Guide and Specifications 6ni.com
Safety Information
This 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 document.
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 NI for repair.
Do not substitute parts or modify the DIO device except as described in this
document. 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 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:
•PollutionDegree1meansnopollutionoronlydry,nonconductive
pollution occurs. The pollution has no influence.
•PollutionDegree2meansthatonlynonconductivepollutionoccursin
most cases. Occasionally, however, a temporary conductivity caused
by condensation must be expected.
•PollutionDegree3meansthatconductivepollutionoccurs,ordry,
nonconductive pollution occurs that becomes conductive due to
condensation.
You must insulate s i g n al con necti on s for the maximum volta g e for whi c h
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.

©National Instruments Corporation 7 NI 6509 User Guide and Specifications
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:
•MeasurementCategoryIisformeasurementsperformedoncircuits
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.
•MeasurementCategoryIIisformeasurementsperformedoncircuits
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.
•MeasurementCategoryIIIisformeasurements 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.
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 8ni.com
Electromagnetic Compatibility Guidelines
This product was tested and complies with the regulatory requirements and
limits for electromagnetic compatibility (EMC) as stated in the product
specifications. These requirements and limits are designed to provide
reasonable protection against harmful interference when the product is
operated in its intended operational electromagnetic environment. There is
no guarantee that interference will not occur in a particular installation.
To minimize the potential for the product to cause interference to radio
and television reception or to experience unacceptable performance
degradation, install and use this product in strict accordance with the
instructions in the product documentation.
Caution The following statements contain important EMC information needed before
installing and using this product:
•Thisproductisintendedforuseinindustriallocations.Asaresult,thisproductmay
cause interference if used in residential areas. Such use must be avoided unless the user
takes special measures to reduce electromagnetic emissions to prevent interference to
the reception of radio and television broadcasts.
•Thisproductmaybecomemoresensitivetoelectromagneticdisturbancesinthe
operational environment when test leads are attached or when connected to a test
object.
•Emissionsthatexceedtheregulatoryrequirements may occur when this product is
connected to a test object.
•ChangesormodificationsnotexpresslyapprovedbyNationalInstrumentscouldvoid
the user’s authority to operate the hardware under the local regulatory rules.
• Operate this product only with shielded cables and accessories.

©National Instruments Corporation 9 NI 6509 User Guide and Specifications
Related Documentation
The following documents contain information that you may find helpful as
you use this user guide:
•DAQ Getting Started guides—These guides describe how to install the
NI-DAQmx driver 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 NI devices. NI-DAQmx is the software you
use to communicate with and control National Instruments DAQ
devices.
•Measurement & Automation Explorer Help for NI-DAQmx—This
help file contains information about configuring and testing DAQ
devices using 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 c a n d ow n l o a d t h e s e d o c u m e n t s fro m ni.com/manuals.
I/O Connector
Caution This NI product must be operated with shielded cables and accessories to ensure
compliance with the Electromagnetic Compatibility (EMC) requirements defined in the
Specifications section of this document. Do not use unshielded cables or accessories unless
they are installed in a shielded enclosure with properly designed and shielded input/output
ports and connected to the NI product using a shielded cable. If unshielded cables or
accessories are not properly installed and shielded, the EMC specifications for the product
are no longer guaranteed.
The 100-pin high-density SCSI connector on the NI 6509 provides access
to 96 digital inputs and outputs. Use this connector to connect to external
devices, such as solid-state relays (SSRs) and LEDs. For easy connection
to the digital I/O connector, use the SH100-100-F shielded digital I/O cable
with the SCB-100 connector block, or use the R1005050 ribbon cable with
the CB-50 or CB-50LP connector block.
Caution Do not make connections to the digital I/O that exceed the maximum I/O
specifications. Doing so may permanently damage the NI 6509 device and the computer.
Refer to the Signal Descriptions and Specifications sections for information about the
maximum I/O specifications.

NI 6509 User Guide and Specifications 10 ni.com
Pin Assignments
SH100-100-F Connector
Figure 3 shows the pin assignments for the SH100-100-F cable when you
connect it to the NI 6509 device. The naming convention for each pin is
PX.Y, where Xis the port (P) number, and Yis the line number.

©National Instruments Corporation 11 NI 6509 User Guide and Specifications
Figure 3. SH100-100-F Connector Pinout
Refer to the Signal Descriptions section for information about the signals
available on this connector.
+5 V
P3.0
P0.0
P3.1
P0.1
P3.2
P0.2
P3.3
P0.3
P3.4
P0.4
P3.5
P0.5
P3.6
P0.6
P3.7
P0.7
P4.0
P1.0
P4.1
P1.1
P4.2
P1.2
P4.3
P1.3
P4.4
P1.4
P4.5
P1.5
P4.6
P1.6
P4.7
P1.7
P5.0
P2.0
P5.1
P2.1
P5.2
P2.2
P5.3
P2.3
P5.4
P2.4
P5.5
P2.5
P5.6
P2.6
P5.7
+5 V
P9.0
P6.0
P9.1
P6.1
P9.2
P6.2
P9.3
P6.3
P9.4
P6.4
P9.5
P6.5
P9.6
P6.6
P9.7
P6.7
P10.0
P7.0
P10.1
P7.1
P10.2
P7.2
P10.3
P7.3
P10.4
P7.4
P10.5
P7.5
P10.6
P7.6
P10.7
P7.7
P11.0
P8.0
P11.1
P8.1
P11.2
P8.2
P11.3
P8.3
P11.4
P8.4
P11.5
P8.5
P11.6
P8.6
P11.7
GND
P2.7
25
24
23
22
21
20
19
18
17
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
75
74
73
72
71
70
69
68
67
66
65
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
100
99
98
97
96
95
94
93
92
91
90
89
88
87
86
85
84
83
82
81
80
79
78
77
76
GND
P8.7

NI 6509 User Guide and Specifications 12 ni.com
R1005050 Connector
Figure 4 shows the pin assignments for the R1005050 cable when you
connect it to the NI 6509 device. The naming convention for each pin is
PX.Y, where Xis the port (P) number, and Yis the line number or name.
Figure 4. R1005050 Connector Pinout
Refer to the Signal Descriptions section for information about the signals
available on this connector.
+5 V
P0.0
P0.1
P0.2
P0.3
P0.4
P0.5
P0.6
P0.7
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
P1.6
P1.7
P2.0
P2.1
P2.2
P2.3
P2.4
P2.5
P2.6
P2.7
GND
P3.1
P3.2
P3.4
P3.5
P3.6
P3.7
P3.0
P3.3
P4.0
P4.1
P4.2
P4.3
P4.4
P4.5
P4.6
P4.7
P5.0
P5.1
P5.2
P5.3
P5.4
P5.5
P5.6
P5.7
49 50
47 48
45 46
43 44
41 42
39 40
37 38
35 36
33 34
31 32
29 30
27 28
25 26
23 24
21 22
19 20
17 18
15 16
13 14
11 12
910
78
56
34
12
Positions 1 through 50
+5 V
P6.0
P6.1
P6.2
P6.3
P6.4
P6.5
P6.6
P6.7
P7.0
P7.1
P7.2
P7.3
P7.4
P7.5
P7.6
P7.7
P8.0
P8.1
P8.2
P8.3
P8.4
P8.5
P8.6
P8.7
GND
P9.1
P9.2
P9.4
P9.5
P9.6
P9.7
P9.0
P9.3
P10.0
P10.1
P10.2
P10.3
P10.4
P10.5
P10.6
P10.7
P11.0
P11.1
P11.2
P11.3
P11.4
P11.5
P11.6
P11.7
49 50
47 48
45 46
43 44
41 42
39 40
37 38
35 36
33 34
31 32
29 30
27 28
25 26
23 24
21 22
19 20
17 18
15 16
13 14
11 12
910
78
56
34
12
Positions 51 through 100

©National Instruments Corporation 13 NI 6509 User Guide and Specifications
Signal Descriptions
Table 1 lists the signals and descriptions for all signals available on the
NI 6509 device.
Table 1. NI 6509 Signal Descriptions
Pin Signal Name Description MSB LSB
1, 3, 5, 7, 9, 11, 13, 15 P2.<7..0> Bi-directional data lines for
port 2
P2.7 P2.0
2, 4, 6, 8, 10, 12, 14, 16 P5.<7..0> Bi-directional data lines for
port 5
P5.7 P5.0
17, 19, 21, 23, 25, 27,
29, 31
P1.<7..0> Bi-directional data lines for
port 1
P1.7 P1.0
18, 20, 22, 24, 26, 28,
30, 32
P4.<7..0> Bi-directional data lines for
port 4
P4.7 P4.0
33, 35, 37, 39, 41, 43,
45, 47
P0.<7..0> Bi-directional data lines for
port 0
P0.7 P0.0
34, 36, 38, 40, 42, 44,
46, 48
P3.<7..0> Bi-directional data lines for
port 3
P3.7 P3.0
49, 99 +5 V supply +5 volts; provides +5 V power
source
— —
50, 100 GND Ground; connected to the
computer ground signal
— —
51, 53, 55, 57, 59, 61,
63, 65
P8.<7..0> Bi-directional data lines for
port 8
P8.7 P8.0
52, 54, 56, 58, 60, 62,
64, 66
P11.<7..0> Bi-directional data lines for
port 11
P11.7 P11.0
67, 69, 71, 73, 75, 77,
79, 81
P7.<7..0> Bi-directional data lines for
port 7
P7.7 P7.0
68, 70, 72, 74, 76, 78,
80, 82
P10.<7..0> Bi-directional data lines for
port 10
P10.7 P10.0
83, 85, 87, 89, 91, 93,
95, 97
P6.<7..0> Bi-directional data lines for
port 6
P6.7 P6.0
84, 86, 88, 90, 92, 94,
96, 98
P9.<7..0> Bi-directional data lines for
port 9
P9.7 P9.0

NI 6509 User Guide and Specifications 14 ni.com
Digital I/O
Static DIO on NI 6509 Devices
The NI 6509 device provides 96 lines of bi-directional DIO signals,
P<0..11>.<0..7>. You can use each of the DIO lines as a static digital input
(DI) or digital output (DO) line. All samples of DI lines and updates of DO
lines are software-timed.
I/O Protection
Use the following guidelines to avoid electrostatic discharge (ESD) events
and fault conditions such as overvoltage, undervoltage, and overcurrent:
•IfyouconfigureaDIOlineasanoutput,donotconnectthelinetoany
external signal source, ground signal, or power supply.
•IfyouconfigureaDIOlineasanoutput,understandthecurrent
requirements of the load. Do not exceed the output limits of the
DAQ device. NI has several signal conditioning solutions for digital
applications that require high current drive.
•IfyouconfigureaDIOlineasaninput,donotdrivethelinewith
voltages outside of the normal operating range.
•TreattheDAQdeviceasyouwouldtreatanystaticsensitivedevice.
Always properly ground yourself and the equipment when handling
the DAQ device or connecting to it.

©National Instruments Corporation 15 NI 6509 User Guide and Specifications
I/O Pull-Up/Pull-Down Resistors (NI PCIe-6509 Only)
The NI PCIe-6509 has user-configurable pull-up and pull-down resistors.
The DIO lines on the NI PCIe-6509 are connected to an NI ASIC that
contains a weak pull-down resistor (47 k:, typical), and each DIO line is
connected to a software-selectable strong pull-up resistor (4.7 k:, typical),
as Figure 5 shows.
Figure 5. NI PCIe-6509 Digital I/O Circuitry
If you set the software to pull-down, the weak pull-down resistor in the
NI ASIC pulls the DIO line low. If you set the software to pull-up, the
strong pull-up resistor pulls the DIO line high. The pull setting takes effect
regardless of the I/O direction, but the pull setting affects only the state of
the DIO lines that are configured for input.
To use MAX to configure the I/O pull resistor, select the device and click
the Properties button. Refer to the software documentation for information
about how to program the pull setting using NI-DAQmx with LabVIEW or
other NI application development environments (ADEs).
NI ASIC
Digital I/O Line
+5 V
GND
47 kΩ,
typical
4.7 kΩ, typical
Software Controlled
I/O Protection

NI 6509 User Guide and Specifications 16 ni.com
Signal Connections
Figure 6 shows an example of signal connections for three typical
digital I/O applications. Port 0 is configured for digital output, and port 7
is configured for digital input.
Figure 6. NI 6509 Signal Connections
Digital output applications include sending TTL signals and driving
external devices such as the LED shown in the figure. Digital input
applications include receiving TTL signals and sensing external device
states such as the state of the switch in the figure.
Protecting Inductive Loads
When inductive loads are connected to output lines, a large
counter-electromotive force may occur at switching time because of the
energy stored in the inductive load. These flyback voltages can damage
the outputs and/or the power supply.
41
43
45
47
67
69
71
73
50, 100
NI 6509
+5 V
+5 V
LED
Port 7
P7<7..4>
Port 0
P0<3..0>
GND
TTL Signal

©National Instruments Corporation 17 NI 6509 User Guide and Specifications
To limit these flyback voltages at the inductive load, install a flyback diode
across the inductive load. For best results, mount the flyback diode within
18 inches of the load. Figure 7 shows an example of using an external
flyback diode to protect inductive loads.
Figure 7. Limiting Flyback Voltages at the Inductive Load
Sinking and Sourcing Examples
The following sections provide examples of driving a relay with no more
than 24 mA, driving a relay with more than 24 mA, and driving a
solid-state relay (SSR).
Driving a Relay d24 mA
Figures 8 and 9 show examples of connecting the NI 6509 to a relay that
does not require more than 24 mA of current.
Figure 8. NI 6509 Sinking Connection Example, d24 mA
PX.Y
GND
Load
NI 6509 Flyback Diode for
Inductive Loads
PX.Y
GND
NI 6509
Vcc

NI 6509 User Guide and Specifications 18 ni.com
Figure 9. NI 6509 Sourcing Connection Example, d24 mA
Driving a Relay > 24 mA
Figures 10 and 11 are examples of connecting the NI 6509 to a relay that
requires more than 24 mA of current. These examples use an additional
transistor circuit.
Figure 10. NI 6509 Sinking Connection Example, > 24 mA
Figure 11. NI 6509 Sourcing Connection Example, > 24 mA
P X . Y
GND
NI 6509
P X . Y
GND
NI 6509
Vcc
PX.Y
GND
NI 6509
Vcc

©National Instruments Corporation 19 NI 6509 User Guide and Specifications
Driving an SSR
Figure 12 shows an example of connecting the NI 6509 to an SSR.
Figure 12. NI 6509 SSR Connection Example
Power Connections
+5 V Power Available at I/O Connector
Pins 49 and 99 supply +5 V power to the I/O connector. The I/O connector
power has a fuse for overcurrent protection. This fuse is not customer
replaceable. If the fuse is blown, return the device to NI for repair.
Caution Do not connect the +5 V power pin directly to ground or to any other voltage
source on any other device. Doing so may permanently damage the NI 6509 device and the
computer.
Disk Drive Power Connector (NI PCIe-6509 Only)
The disk drive power connector is a four-pin hard drive connector on the
NI PCIe-6509 that, when connected, increases the current the device can
supply on the +5 V terminal.
Note The disk drive power has a fuse for overcurrent protection. This fuse is not customer
replaceable. If the fuse is blown, the fuse LED (reference designator DS1—located on the
visible edge of the underside of the installed device) is lit. In this case, return the device to
NI for repair.
When to Use the Disk Drive Power Connector
You can install the disk drive power connector if you want to increase the
power supply on the +5 V terminal. However, it is not necessary to install
the disk drive power connector for most applications.
Refer to the Specifications section for more information about the power
requirements and power limits of the NI PCIe-6509.
+
–
VAC SSR
PX.Y
GND
Load
Load
NI 6509

NI 6509 User Guide and Specifications 20 ni.com
Disk Drive Power Connector Installation
Before installing the disk drive power connector, you must install and set
up the NI PCIe-6509 as described in the DAQ Getting Started guides.
Complete the following steps to install the disk drive power connector:
1. Power off and unplug the computer.
2. Remove the computer cover.
3. Attach the PC disk drive power connector to the disk drive power
connector on the NI PCIe-6509, as Figure 13 shows.
Figure 13. Connecting to the Disk Drive Power Connector
Note The power available on the disk drive power connectors in a computer can vary.
For example, consider using a disk drive power connector that is not in the same power
chain as the hard drive.
4. Replace the computer cover, and plug in and power on the computer.
Industrial DIO Features
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 c a n c on fi g u re th e di g i t a l in p ut l ines to pa s s t h r o u g h a digita l fi l t e r a nd
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.
1Device Disk Drive Power Connector 2PC Disk Drive Power Connector
12