National Instruments PCI-6512, PXI-6512, PCI-6513, PXI-6513, PCI-6514 User Manual
...
DAQ
NI 651x User Manual
NI PCI-6510, PCI-6511, PXI-6511, PCI-6512, PXI-6512,
PCI-6513, PXI-6513, PCI-6514, PXI-6514, PCI-6515, PXI-6515,
PCI-6516, PCI-6517, PCI-6518, and PCI-6519 Devices
NI 651x User Manual
August 2019
372172C-01
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Contents
About This Manual
Related Documentation .................................................................................................... ix
Chapter 1
NI 651x Fundamentals
NI 651x Configuration...................................................................................................... 1-1
NI 651x Functional Overview .......................................................................................... 1-2
Chapter 2
NI 651x Features
Digital Filtering ................................................................................................................ 2-1
Digital Filtering Example ......................................................................................... 2-2
Programmable Power-Up States....................................................................................... 2-2
Change Detection ............................................................................................................. 2-3
Change Detection Example ...................................................................................... 2-3
Watchdog Timer ............................................................................................................... 2-4
Chapter 3
Digital I/O
I/O Connector ...................................................................................................................3-1
NI 6510 I/O Connector ............................................................................................. 3-1
NI 6511 I/O Connector ............................................................................................. 3-1
NI 6512/6513 I/O Connector.................................................................................... 3-2
NI 6514/6515 I/O Connector.................................................................................... 3-2
NI 6516/6517 I/O Connector.................................................................................... 3-3
NI 6518/6519 I/O Connector.................................................................................... 3-3
Pin Assignments ............................................................................................................... 3-5
NI 6510 Pin Assignments ......................................................................................... 3-5
NI 6511 SH100-100-F Pin Assignments .................................................................. 3-6
NI 6511 R1005050 Pin Assignments ....................................................................... 3-8
NI 6512 SH100-100-F Pin Assignments .................................................................. 3-8
NI 6512 R1005050 Pin Assignments ....................................................................... 3-10
NI 6513 SH100-100-F Pin Assignments .................................................................. 3-10
NI 6513 R1005050 Pin Assignments ....................................................................... 3-12
NI 6514 SH100-100-F Pin Assignments .................................................................. 3-12
NI 6514 R1005050 Pin Assignments ....................................................................... 3-14
NI 6515 SH100-100-F Pin Assignments .................................................................. 3-14
NI 6515 R1005050 Pin Assignments ....................................................................... 3-16
NI 6516 Pin Assignments ......................................................................................... 3-17
NI 6517 Pin Assignments ......................................................................................... 3-18
NI 6518 Pin Assignments ......................................................................................... 3-19
© National Instruments | v
Contents
NI 6519 Pin Assignments .........................................................................................3-20
Signal Descriptions ........................................................................................................... 3-21
NI 6510 Signal Descriptions..................................................................................... 3-21
NI 6511 Signal Descriptions..................................................................................... 3-21
NI 6512 Signal Descriptions..................................................................................... 3-22
NI 6513 Signal Descriptions..................................................................................... 3-23
NI 6514 Signal Descriptions..................................................................................... 3-23
NI 6515 Signal Descriptions..................................................................................... 3-25
NI 6516 Signal Descriptions..................................................................................... 3-26
NI 6517 Signal Descriptions..................................................................................... 3-26
NI 6518 Signal Descriptions..................................................................................... 3-27
NI 6519 Signal Descriptions..................................................................................... 3-27
Chapter 4
Power Connections
Isolation ............................................................................................................................ 4-1
NI 6510 .....................................................................................................................4-1
NI 6511 .....................................................................................................................4-1
NI 6512/6513 ............................................................................................................ 4-1
NI 6514/6515 ............................................................................................................ 4-1
NI 6516/6517 ............................................................................................................ 4-1
NI 6518/6519 ............................................................................................................ 4-1
Optically Isolated Inputs (NI 6510/6511/6514/6515/6518/6519) ....................................4-2
Sensing DC Voltages ................................................................................................ 4-2
Input Signal Connection Example ............................................................................4-2
Optically Isolated Outputs with Darlington Arrays
(NI 6512/6513/6514/6515/6516/6517/6518/6519)........................................................ 4-4
Power-On and Power-Off Conditions.......................................................................4-4
Output Signal Connection Example (Sourcing Current) .......................................... 4-5
Distributing Current (NI 6516/6518 Only)....................................................... 4-6
Output Signal Connection Example (Sinking Current) ............................................ 4-7
Distributing Current (NI 6517/6519 Only)....................................................... 4-9
Chapter 5
Cables and Accessories
Accessories for 37-Pin Devices ........................................................................................ 5-1
NI SH37F-37M Cable............................................................................................... 5-2
Accessories for 100-Pin Devices ...................................................................................... 5-2
SH100-100-F Cable .................................................................................................. 5-2
R1005050 Ribbon Cable........................................................................................... 5-2
vi | ni.com
Appendix A
NI Services
Glossary
Index
NI 651x User Manual
© National Instruments | vii
About This Manual
This manual describes how to use the National Instruments
6510, 6511, 6512, 6513, 6514, 6515, 6516, 6517, 6518, and
6519 data acquisition (DAQ) devices with NI-DAQ 7.3 or
later. If you have not already installed the DAQ device,
refer to the DAQ Getting Started Guide for installation
instructions.
Related Documentation
The following documents contain information that you may find helpful as you use this help file:
• NI 651x Specifications—This document contains
specifications for the NI 6510, NI 6511, NI 6512, NI
6513, NI 6514, NI 6515, NI 6516, NI 6517, NI 6518,
and NI 6519 devices. It is available for download at
ni.com/manuals.
• 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.
• Measurement & Automation Explorer Help for
Traditional NI-DAQ (Legacy)—This help file contains
information about configuring and testing DAQ
devices using Measurement & Automation Explorer
(MAX) for Traditional NI-DAQ (Legacy), 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.
1
NI 651x Fundamentals
The NI 6510 is a 30 V bank isolated data acquisition (DAQ) device for PCI chassis. The NI 6510
device features 32 digital input lines with digital filtering.
The NI 6511 is a 30 V bank isolated data acquisition (DAQ) device for PCI, PXI, or CompactPCI
chassis. The NI 6511 device features 64 digital input lines with digital filtering.
The NI 6512/6513 devices are 30 V bank isolated data acquisition (DAQ) devices for PCI, PXI,
or CompactPCI chassis. The NI 6512/6513 devices feature 64 unidirectional digital output lines
for sourcing (6512) and sinking (6513) current, a watchdog timer, and programmable power-up
states.
The NI 6514/6515 devices are 30 V bank isolated data acquisition (DAQ) devices for PCI, PXI,
or CompactPCI chassis. The NI 6514/6515 devices feature 32 digital input lines and 32 digital
output lines for sourcing (6514) and sinking (6515) current, a watchdog timer, digital filtering,
and programmable power-up states.
The NI 6516/6517 devices are 30 V bank isolated data acquisition (DAQ) devices for PCI
chassis. The NI 6516/6517 devices feature 32 unidirectional digital output lines for sourcing
(6516) and sinking (6517) current, a watchdog timer, and programmable power-up states.
The NI 6518/6519 devices are 30 V bank isolated data acquisition (DAQ) devices for PCI
chassis. The NI 6518/6519 devices feature 16 digital input lines and 16 digital output lines for
sourcing (6518) and sinking (6519) current, a watchdog timer, digital filtering, and
programmable power-up states.
NI 651x Configuration
The NI 651x devices are completely software configurable, so it is not necessary to set jumpers
for I/O configuration.
The PCI-651x devices are fully compliant with the PCI Local Bus Specification, Revision 2.2,
and the PXI-6511/6512/6513/6514/6515 devices are 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 NI 651x 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 651x device and the software are installed, the DAQ device appears under the
Devices and Interfaces branch of the MAX configuration tree.
© National Instruments | 1-1
Chapter 1 NI 651x Fundamentals
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 7.3 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 651x Functional Overview
The following block diagrams illustrate the key functional components of the NI 651x devices.
Figure 1-1. NI 6510 Block Diagram
10 MHz
PX.<0..7>
32
COM
I/O Connector
x32 Bank Isolated Input Channels
VCC
DI
32 Digital
Inputs
Clock
Industrial Digital
Input Control FPGA
Digital
Filtering
Input Lines
Change
Detection
Flash
Memory
Data/Control
Configuration
Control
PCI Bus
Interface
Data/Control
PCI Bus
PX.<0..7>
8
PX.COM
I/O Connector
x8 Bank Isolated Digital Input Ports
x8 Inputs per Port
1-2 | ni.com
Figure 1-2. NI 6511 Block Diagram
10 MHz
Clock
Vcc
DI
64 Digital
Inputs
Industrial Digital
Input Control FPGA
Digital
Filtering
Input Lines
Change
Detection
Data/Control
Configuration
Flash
Memory
Control
PCI Bus
Interface
Data/Control
PCI/PXI/CompactPCI Bus
Industrial Digital
Output Control FPGA
Output Lines
Programmable
Power-Up States
Watchdog Timer
64 Digital
Outputs
PX.COM
PX.Vcc
PX.<0..7>
8
x8 Bank Isolated Digital Output Ports
PCI/PXI/CompactPCI Bus
10 MHz
Clock
Data/Control
PCI Bus
Interface
Data/Control
Flash
Memory
Configuration
Control
DO
x8 Outputs per Port
Vol tage
Regulator
I/O Connector
Vol tage
Regulator
PX.COM (Vcc)
PX.<0..7>
I/O Connector
PX.GND
x8 Bank Isolated Digital Output Ports
x8 Outputs per Port
Figure 1-3. NI 6512 Block Diagram
Figure 1-4. NI 6513 Block Diagram
10 MHz
Clock
Industrial Digital
Output Control FPGA
Programmable
Output Lines
Power-Up States
Watchdog Timer
Configuration
64 Digital
DO
Outputs
Flash
Memory
Data/Control
Control
NI 651x User Manual
PCI Bus
Data/Control
Interface
PCI/PXI/CompactPCI Bus
PX.<0..7>
PX.COM
x4 Bank Isolated Digital Input Ports
I/O Connector
PX.Vcc
PX.<0..7>
PX.COM
x4 Bank Isolated Digital Output Ports
8
Vol tage
Regulator
8
Figure 1-5. NI 6514 Block Diagram
Vcc
DI
32
x8 Inputs per Port
x8 Outputs per Port
Digital
Inputs
Digital
Outputs
DO
DIO Lines
32
Industrial Digital
I/O Control FPGA
Filtering
10 MHz
Clock
Programmable
Power-Up States
Watchdog Timer
Digital
Change
Detection
Flash
Memory
Data/Control
Configuration
PCI Bus
Interface
Control
© National Instruments | 1-3
Data/Control
PCI/PXI/CompactPCI Bus
Chapter 1 NI 651x Fundamentals
PX.COM (Vcc)
PX.<0..7>
PX.GND
DO
x8 Outputs per Port
x4 Bank Isolated Digital Output Ports
PCI/PXI/CompactPCI Bus
Data/Control
PCI Bus
Interface
10 MHz
Clock
32
Digital
Outputs
32
Digital
Inputs
I/O Connector
8
PX.COM
PX.<0..7>
Vcc
x4 Bank Isolated Digital Input Ports
x8 Inputs per Port
DI
Industrial Digital
I/O Control FPGA
DIO Lines
Programmable
Power-Up States
Watchdog Timer
Change
Detection
Digital
Filtering
Data/Control
Flash
Memory
Configuration
Control
Vol tage
Regulator
Figure 1-6. NI 6515 Block Diagram
Figure 1-7. NI 6516 Block Diagram
Vol tage
Regulator
VCC
I/O Connector
PX.<0..7>
32
COM.GND
x32 Bank Isolated Output Channels
10 MHz
Clock
Industrial Digital
Output Control FPGA
Programmable
Output Lines
Power-Up States
Watchdog Timer
32 Digital
DO
Outputs
Flash
Memory
Data/Control
Configuration
Control
PCI Bus
Interface
Data/Control
PCI Bus
COM (VCC)
PX.<0..7>
I/O Connector
GND
1-4 | ni.com
Figure 1-8. NI 6517 Block Diagram
Vol tage
Regulator
x32 Bank Isolated Output Channels
32 Digital
DO
Outputs
10 MHz
Clock
Industrial Digital
Output Control FPGA
Programmable
Power-Up States
Watchdog Timer
Output Lines
Flash
Memory
Data/Control
Configuration
Control
PCI Bus
Interface
Data/Control
PCI Bus
Figure 1-9. NI 6518 Block Diagram
I/O Connector
PCI Bus
Data/Control
PCI Bus
Interface
10 MHz
Clock
16
IN.COM
P<1..2>.<0..7>
VCC
x16 Bank Isolated Input Channels
DI
Industrial Digital
I/O Control FPGA
DIO Lines
Programmable
Power-Up States
Watchdog Timer
Change
Detection
Digital
Filtering
Data/Control
Flash
Memory
Configuration
Control
OUT.COM (VCC)
P<2..3>.<0..7>
GND
DO
Voltage
Regulator
x16 Bank Isolated Output Channels
16
16
Digital
Inputs
16
Digital
Outputs
NI 651x User Manual
P<0..1>.<0..7>
IN.COM
I/O Connector
VCC
P<2..3>.<0..7>
OUT.COM (GND)
16
x16 Bank Isolated
Input Channels
Vol tage
Regulator
16
x16 Bank Isolated
Output Channels
VCC
DI
16
Digital
Inputs
DO
16
Digital
Outputs
10 MHz
Industrial Digital
I/O Control FPGA
DIO Lines
Digital
Filtering
Clock
Programmable
Power-Up States
Watchdog Timer
Change
Detection
Figure 1-10. NI 6519 Block Diagram
Flash
Memory
Data/Control
Configuration
Control
PCI Bus
Interface
Data/Control
PCI Bus
© National Instruments | 1-5
2
NI 651x Features
This chapter describes the National Instruments digital I/O features available for NI 651x
devices. For more information on the NI industrial DIO feature set, refer to the Complete
Industrial Digital I/O and Counter/Timer Tutorial. To access this tutorial, visit
and enter the code rdcidi.
Digital Filtering
Use the digital filter option available on the NI 651x 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 after the
photocouplers, 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.
The filter operates on the inputs from the photocouplers. Photocouplers turn on faster than they
turn off and pass rising edges faster than falling edges.
Table 2-1 lists the pulse widths guaranteed to be passed and blocked.
ni.com/info
Table 2-1. NI 651x Digital Filter Timing Intervals
Filter
Interval
t
interval
You can enable filtering on as many input lines as is necessary for your application. All filtered
lines share the same timing interval, which ranges from 200 s 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.
Pulse Width Passed Pulse Width Blocked
Low Pulse High Pulse Low Pulse High Pulse
t
+ 200 s t
interval
interval
t
/2 (t
interval
© National Instruments | 2-1
interval
/2) – 200
s
Chapter 2 NI 651x Features
External
Signal
External
Signal
Sampled
Filter
Clock
Sample Clock (100 ns)
Filtered
Signal
HHHHH
HLLHH
HLLHH
A
B
C
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.
Digital Filtering Example
Figure 2-1 shows a filter configuration with a t
Figure 2-1. 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.
Figure 2-1 shows a rising (0 to 1) transition. The same filtering applies to falling (1 to 0)
transitions.
filter interval (t
interval
/2 filter clock).
interval
Programmable Power-Up States
At power-up, the output drives on the NI 651x device is disabled. All output lines are
user-configurable for an on or off state. User-configurable power-up states are useful for
ensuring that the NI 651x device 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).
2-2 | ni.com
Note NI 6512/6513/6516/6517 devices do not support digital filtering.
Note The response time of programmable power-up states is 400 ms.
Note NI 6510/6511 devices do not support programmable power-up states.
NI 651x User Manual
Change Detection
You can program NI 651x devices to send an interrupt when a change occurs on any input line.
The DIO device 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 DIO
device 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 DIO device 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 2-2 shows a change detection example for six bits of one port.
Table 2-2. Change Detection Example
Bit
7 6 5 4 3 2 1 0
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
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 DIO
device detects any change in the input data so you can read the new data value.
• Bit 1 is connected to a limit sensor. The DIO device 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.
© National Instruments | 2-3
Chapter 2 NI 651x Features
In this example, the DIO device 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 DIO device 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.
Note NI 6512/6513/6516/6517 devices do not support change detection.
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 651x device.
Note The NI-DAQmx Watchdog feature is meant to protect a system from software
errors and hangs. In the case of a PXI system with remote control through MXI, a lost
MXI connection could result in unexpected Watchdog behavior and therefore
improperly implemented Watchdog states.
When the watchdog timer is enabled, if the NI 651x device does not receive a watchdog 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 651x device 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 651x device ignores any writes
until the watchdog timer is disarmed.
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
32
–1) 100 ns (approximately seven minutes) before it expires.
(2
Note NI 6510/6511 devices do not support the watchdog timer.
2-4 | ni.com
3
Digital I/O
I/O Connector
NI 6510 I/O Connector
The 37-pin D-SUB connector on the NI 6510 provides access to the digital inputs. The digital
I/O available on this connector includes 32 inputs. For easy connection to the digital I/O
connector, use the National Instruments SH37F-37M shielded digital I/O cable with the CB-37F
connector block. For more information on digital I/O connectivity options, refer to Chapter 5,
Cables and Accessories.
Caution Do not make connections to the digital I/O that exceed the maximum I/O
specifications. Doing so could permanently damage the NI 6510 and the computer.
Refer to the NI 651x Specifications, available at
about maximum input ratings.
The input lines on the NI 6510 consist of input photocouplers, which react to a voltage
differential rather than only to a voltage increase. If the voltage connected to a digital input is
either greater than or less than the voltage connected to COM by at least the logic threshold, the
reading on the digital line will be logic high, even though in one instance the digital line has a
lower voltage level than COM.
ni.com/manuals, for information
For more information, refer to the Pin Assignments section.
NI 6511 I/O Connector
The 100-pin high-density SCSI connector on the NI 6511 provides access to the digital inputs.
The digital I/O available on this connector includes 64 inputs. For easy connection to the digital
I/O connector, use the National Instruments 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. For more information on digital I/O connectivity options, refer to Chapter 5,
Cables and Accessories.
Caution Do not make connections to the digital I/O that exceed the maximum I/O
specifications. Doing so could permanently damage the NI 6511 and the computer.
Refer to the NI 651x Specifications, available at
about maximum input ratings.
ni.com/manuals, for information
© National Instruments | 3-1
Chapter 3 Digital I/O
The input lines on the NI 6511 consist of input photocouplers, which react to a voltage
differential rather than only to a voltage increase. If the voltage connected to a digital input is
either greater than or less than the voltage connected to PX.COM by at least the logic threshold,
the reading on the digital line will be logic high, even though in one instance the digital line has
a lower voltage level than PX.COM.
For more information, refer to the Pin Assignments section.
NI 6512/6513 I/O Connector
The 100-pin high-density SCSI connector on the NI 6512/6513 provides access to the digital
inputs and outputs. The digital I/O available on this connector includes 64 outputs. For easy
connection to the digital I/O connector, use the National Instruments 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. For more information on digital I/O connectivity options,
refer to Chapter 5, Cables and Accessories.
Caution Do not make connections to the digital I/O that exceed the maximum I/O
specifications. Doing so could permanently damage the NI 6512/6513 and the
computer. Refer to the NI 651x Specifications, available at
information about maximum input ratings.
The output lines on the NI 6512 consist of photocouplers and Darlington arrays. To connect to
these signals, connect a 5 V to 30 V power supply to VCC, connect COM (GND) to ground, and
cross a load between digital output and COM (GND).
ni.com/manuals, for
The output lines on the NI 6513 consist of photocouplers and Darlington arrays. To connect to
these signals, connect a 5 V to 30 V power supply to COM (VCC), connect GND to ground, and
cross a load between digital output and COM (VCC).
For more information, refer to the Pin Assignments section.
NI 6514/6515 I/O Connector
The 100-pin high-density SCSI connector on the NI 6514/6515 provides access to the digital
inputs and outputs. The digital I/O available on this connector includes 32 inputs and 32 outputs.
For easy connection to the digital I/O connector, use the National Instruments 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. For more information on digital I/O connectivity
options, refer to Chapter 5, Cables and Accessories.
Caution Do not make connections to the digital I/O that exceed the maximum I/O
specifications. Doing so could permanently damage the NI 6514/6515 and the
computer. Refer to the NI 651x Specifications, available at
information about maximum input ratings.
3-2 | ni.com
ni.com/manuals, for
NI 651x User Manual
The input lines on the NI 6514/6515 consist of input photocouplers, which react to a voltage
differential rather than only to a voltage increase. If the voltage connected to a digital input is
either greater than or less than the voltage connected to PX.COM by at least the logic threshold,
the reading on the digital line will be logic high, even though in one instance the digital line has
a lower voltage level than PX.COM.
The output lines on the NI 6514 consist of photocouplers and Darlington arrays. To connect to
these signals, connect a 5 V to 30 V power supply to VCC, connect COM (GND) to ground, and
cross a load between digital output and COM (GND).
The output lines on the NI 6515 consist of photocouplers and Darlington arrays. To connect to
these signals, connect a 5 V to 30 V power supply to COM (VCC), connect GND to ground, and
cross a load between digital output and COM (VCC).
For more information, refer to the Pin Assignments section.
NI 6516/6517 I/O Connector
The 37-pin D-SUB connector on the NI 6516/6517 provides access to the digital inputs and
outputs. The digital I/O available on this connector includes 32 outputs. For easy connection to
the digital I/O connector, use the National Instruments SH37F-37M shielded digital I/O cable
with the CB-37F connector block. For more information on digital I/O connectivity options,
refer to Chapter 5, Cables and Accessories.
Caution Do not make connections to the digital I/O that exceed the maximum I/O
specifications. Doing so could permanently damage the NI 6516/6517 and the
computer. Refer to the NI 651x Specifications, available at ni.com/manuals, for
information about maximum input ratings.
The output lines on the NI 6516 consist of photocouplers and Darlington arrays. To connect to
these signals, connect a 5 V to 30 V power supply to VCC, connect COM (GND) to ground, and
cross a load between digital output and COM (GND).
The output lines on the NI 6517 consist of photocouplers and Darlington arrays. To connect to
these signals, connect a 5 V to 30 V power supply to COM (VCC), connect GND to ground, and
cross a load between digital output and COM (VCC).
For more information, refer to the Pin Assignments section.
NI 6518/6519 I/O Connector
The 37-pin D-SUB connector on the NI 6518/6519 provides access to the digital inputs and
outputs. The digital I/O available on this connector includes 32 inputs and 32 outputs. For easy
connection to the digital I/O connector, use the National Instruments SH37F-37M shielded
digital I/O cable with the CB-37F connector block. For more information on digital I/O
connectivity options, refer to Chapter 5, Cables and Accessories.
© National Instruments | 3-3
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