Related Manuals for National Instruments DAQ 6527
Summary of Contents for National Instruments DAQ 6527
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Page 1: User Manual
6527 User Manual Isolated Digital I/O Interface for PCI, PXI, and CompactPCI 6527 User Manual December 1999 Edition Part Number 322164A-01... - Page 2 Switzerland 056 200 51 51, Taiwan 02 2377 1200, United Kingdom 01635 523545 For further support information, see the Technical Support Resources appendix. To comment on the documentation, send e-mail to techpubs@ni.com © Copyright 1999 National Instruments Corporation. All rights reserved.
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Page 3: Important Information
Any action against National Instruments must be brought within one year after the cause of action accrues. National Instruments shall not be liable for any delay in performance due to causes beyond its reasonable control. -
Page 4: Table Of Contents
About the 6527 Device ...1-1 Using PXI with CompactPCI...1-2 What You Need to Get Started ...1-2 Unpacking ...1-3 Software Programming Choices ...1-3 National Instruments Application Software ...1-3 NI-DAQ Driver Software ...1-4 Optional Equipment ...1-5 Custom Cabling ...1-6 Safety Information ...1-6... - Page 5 Contents Solid-State Relay Outputs ... 3-9 Output Channels... 3-9 Overcurrent Protection ... 3-12 Power-on and Power-off Conditions... 3-12 Chapter 4 Device Overview Functional Overview ... 4-1 PCI Interface Circuitry... 4-2 Digital I/O Circuitry... 4-2 Optical Isolation Circuitry ... 4-3 Digital Filtering ... 4-3 Change Notification...
- Page 6 Tables Table 3-1. Port Functionality for 6527 Devices ...3-3 Table 3-2. Signal Descriptions for 6527 Device I/O Connectors ...3-5 Table 4-1. Digital Filter Characteristics ...4-4 Table 4-2. Change Notification Example ...4-6 © National Instruments Corporation Contents 6527 User Manual...
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Page 7: About This Manual
• • • © National Instruments Corporation Your DAQ hardware user manuals—These manuals have detailed information about the DAQ hardware that plugs into or is connected to your computer. Use these manuals for hardware installation and configuration instructions, specification information about your DAQ hardware, and application hints. -
Page 8: Conventions
• • • 6527 User Manual symbol indicates that the text following it applies only to a specific Your computer’s technical reference manual PCI Local Bus Specification, Revision 2.0 National Instruments PXI Specification, Revision 1.0 PICMG 2.0 R2.1 CompactPCI www.ni.com... -
Page 9: Introduction
About the 6527 Device Thank you for purchasing a National Instruments 6527 device. The 6527 devices are 48-bit, parallel, isolated digital I/O interfaces for PCI bus computers and PXI or Compact PCI chassis. The 6527 devices offer 48 channels of isolated digital data acquisition. -
Page 10: Using Pxi With Compactpci
Chapter 1 Introduction Using PXI with CompactPCI Using PXI-compatible products with standard CompactPCI products is an important feature provided by the PXI Specification, Revision 1.0. If you use a PXI-compatible plug-in device in a standard CompactPCI chassis, you will be unable to use PXI-specific functions, but you can still use the basic plug-in device functions. -
Page 11: Unpacking
Remove the board from the package and inspect the board for loose components or any other sign of damage. Notify National Instruments if the board appears damaged in any way. Do not install a damaged board into your computer. -
Page 12: Ni-Daq Driver Software
NI-DAQ Driver Software The NI-DAQ driver software is included with most National Instruments DAQ hardware. NI-DAQ has an extensive library of functions that you can call from your application programming environment. These functions allow you to use all features of your 6527 device. -
Page 13: Optional Equipment
6527 device, including cables, connector blocks, and other accessories, as follows: • • For more information about optional equipment available from National Instruments, refer to your National Instruments catalogue or web site or call the office nearest you. © National Instruments Corporation LabVIEW, LabWindows/CVI,... -
Page 14: Custom Cabling
PXI or CompactPCI chassis, or PCI-bus computer. National Instruments is not liable for any damages or injuries resulting from incorrect signal connections. All signal wiring must be properly insulated. National Instruments is not liable for damage to equipment or injuries caused by improper signal wiring. -
Page 15: Installation And Configuration
PCI-6527 You can install a PCI-6527 in any available 5 V PCI expansion slot in your computer: © National Instruments Corporation Turn off and unplug your computer. Remove the top cover or access port to the expansion slots. 6527 User Manual... -
Page 16: Board Configuration
Chapter 2 Installation and Configuration PXI-6527 You can install a PXI-6527 in any available 5 V peripheral slot in your PXI or CompactPCI chassis: Your 6527 is now installed. You are now ready to configure your hardware and software. Board Configuration Your 6527 device is completely software configurable. -
Page 17: Signal Connections
50-pin accessories with the R1005050 cable or to 100-pin accessories with the shielded SH100100-F cable. Figure 3-1 shows the pin assignments for the 6527 device digital I/O connector. A signal description follows the figures. © National Instruments Corporation 6527 User Manual... -
Page 18: Figure 3-1. 6527 Device Connector Pin Assignments
Chapter 3 Signal Connections Note For input ports, connect the higher voltage to the DIG+ pin and the lower voltage to the DIG– pin. For output ports, you can connect signals to the two pins of each line without regard to which voltage is higher. The output lines consist of solid-state relays and act as bidirectional switches. -
Page 19: Cable Assembly Connectors
1 through 50 and the other to pins 51 through 100 of the 6527 device connector. Figures 3-2 and 3-3 show the pin assignments for the 50-pin connectors on the cable assembly. © National Instruments Corporation Table 3-1. Port Functionality for 6527 Devices Port... -
Page 20: Figure 3-2. Cable-Assembly Connector Pinout
Chapter 3 Signal Connections Figure 3-2. Cable-Assembly Connector Pinout for the R1005050 Ribbon Cable 6527 User Manual DIG+2.7 DIG–2.7 DIG+2.6 DIG–2.6 DIG+2.5 DIG–2.5 DIG+2.4 DIG–2.4 DIG+2.3 DIG–2.3 11 12 DIG+2.2 DIG–2.2 DIG+2.1 13 14 DIG–2.1 DIG+2.0 15 16 DIG–2.0 17 18 DIG+1.7 DIG–1.7 19 20... -
Page 21: I/O Connector Signal Descriptions
12, 14, 16 49, 99 +5 V 50, 100 © National Instruments Corporation Description Isolated input port 0, positive terminals—Take measurements at these terminals. These terminals should be positive relative to their corresponding DIG– lines. A logic high (data bit of 1) indicates input voltage and current are present. -
Page 22: Power Connections
Never connect a +5 V power pin directly to GND. Never connect a +5 V or GND pin to any other voltage source; doing so can lead to injury. National Instruments is not liable for any damages or injuries resulting from such a connection. -
Page 23: Isolation Voltages
DIG+ and DIG– terminals of any input channel. Warning You must not exceed the isolation voltage limits. Exceeding the voltage limits can lead to injury. National Instruments is not liable for any damages resulting from signal connections that exceed these limits. Optically Isolated Inputs On a 6527 device, I/O connector pins 1 through 48, shown in Figure 3-1, represent the optically isolated input signal pins. -
Page 24: Sensing Dc Voltages
Chapter 3 Signal Connections Sensing DC Voltages When you apply a DC voltage of at least 2 V across the two input terminals, the 6527 device registers a logic high for that input. If no voltage is present (a voltage difference of 1 V or less), the 6527 device registers a logic low for that input. -
Page 25: Reducing The Forward Current For High Voltages
Depending on how the load is connected to the terminals, an output can either source or sink currents. Figure 3-5 shows two signal connection examples for driving a load with these solid-state relays. © National Instruments Corporation ) also rises. At 24 V, for example, current is 20 k for R 6527 0.25 W... -
Page 26: Figure 3-5. Signal Connections For Solid-State Relays
Chapter 3 Signal Connections Writing a 0 (logic low) to an output bit closes the relay, and writing a 1 (logic high) opens the relay. To both sink and source current with one channel requires an external resistor. You can use the solid-state relays of a 6527 device with external resistors to drive voltages at TTL or non-TTL levels, from -60 to 60 VDC or 30 VAC (42 V peak). -
Page 27: Figure 3-6. Signal Connections For Driving Ttl Voltages
PCI and CompactPCI systems must be derated according to the ambient temperature. (The PXI chassis has built-in fans to handle 25 W per slot.) © National Instruments Corporation provides source current when the relay is open. small enough to provide the source current you need = 5 k works well. -
Page 28: Overcurrent Protection
Caution Overcurrent protection is for protection against transient fault conditions only. The 6527 should not normally be operated above 120 mA. National Instruments is not liable for any damages resulting from signal connections that exceed 120 mA. Power-on and Power-off Conditions At power-up, the initial state of the digital output lines are logic high and the solid-state relays are open. -
Page 29: Device Overview
The block diagram in Figure 4-1 illustrates the key functional components of your 6527 device. The major components making up your 6527 device include the following: • • • © National Instruments Corporation PCI interface circuitry Digital I/O circuitry Optical isolation circuitry 6527 User Manual... -
Page 30: Pci Interface Circuitry
PCI Interface Circuitry Your 6527 board uses the PCI MITE ASIC to communicate with the PCI bus. The PCI MITE was designed by National Instruments specifically for data acquisition. The PCI MITE is fully compliant with PCI Local Bus Specification 2.0. -
Page 31: Optical Isolation Circuitry
100 µs from a low pulse (a 100 µs change is typical at = 5 mA, RL = 100 ). As a result, the pulse widths guaranteed to be passed and blocked are those shown in Table 4-1. © National Instruments Corporation Input ports –... -
Page 32: Table 4-1. Digital Filter Characteristics
Chapter 4 Device Overview Pulse Width Passed Filter Interval Low Pulse + 100 µs interval interval You can enable filtering on as many input lines as you wish. All filtered lines share the same timing interval. The interval ranges from 100 ns to 100 ms. -
Page 33: Change Notification
After a change, you can read the input lines to determine the current line states. The maximum rate of change notification is therefore limited by software response time and varies from system to system. © National Instruments Corporation Figure 4-2. Digital Filter Timing Chapter 4... -
Page 34: Table 4-2. Change Notification Example
Chapter 4 Device Overview If you anticipate noisy or rapidly changing input lines, use digital filtering to reduce the changes to a manageable number; excessive notifications can hurt system performance. For example, if you want to limit the rate of notifications (and interrupts) to a maximum of one change per line every 10 ms, set a filter interval of 10 ms. -
Page 35: Appendix A Specifications
Max input voltage ... 28 VDC Digital logic levels Input low voltage Input high voltage Input current Isolation... 60 VDC channel-to-channel and © National Instruments Corporation Level 5 V inputs... 1.5 mA/channel max 24 V inputs... 8 mA/channel max channels and 24 solid-state relay output... -
Page 36: Relay Outputs
Appendix A Specifications for Relay Outputs Number of channels...24, each with two terminals that Relay type ...Normally open form A solid-state Max switching voltage Max switching capacity ...120 mA Common-mode isolation ...60 VDC On resistance (see Figure A-2) ...35 Output capacitance ...55 pF at 1 V Off leakage current (max)...200 nA Relay set time (max)...3.0 ms Relay reset time (max)...3.0 ms... - Page 37 CAN/CSA C22.2 No. 1010.1 for electrical measuring and test equipment. Maximum altitude ... 2000 m Pollution degree ... 2 Overvoltage category ... CAT I Indoor use only © National Instruments Corporation PCI-6527 ... 17.5 PXI-6527... 16 Appendix A Specifications for 10.7 cm (6.9...
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Page 38: Technical Support Resources
Technical Support Resources This appendix describes the comprehensive resources available to you in the Technical Support section of the National Instruments Web site and provides technical support telephone numbers for you to use if you have trouble connecting to our Web site or if you do not have internet access. -
Page 39: Germany 089 741 31 30, Greece 30 1 42 96 427, Hong Kong 2645 3186, India
Web sites from If you have trouble connecting to our Web site, please contact your local National Instruments office or the source from which you purchased your National Instruments product(s) to obtain support. For telephone support in the United States, dial 512 795 8248. For... -
Page 40: Glossary
+5 Volts signal amperes alternating current ANSI American National Standards Institute ASIC Application-Specific Integrated Circuit—a proprietary semiconductor component designed and manufactured to perform a set of specific functions © National Instruments Corporation Value –9 – 6 –3 6527 User Manual... - Page 41 Glossary Celsius CAT I installation category (overvoltage category) I—equipment for which measures are taken to limit transient overvoltages to an appropriate low level. Examples include signal-level, telecommunications, and electronic equipment with transient overvoltages smaller than local-level mains supplies. centimeters CompactPCI refers to the core specification defined by the PCI Industrial Computer Manufacturer’s Group (PICMG) data acquisition—a system that uses the personal computer to collect,...
- Page 42 MOSFET metal-oxide semiconductor field-effect transistor most significant bit © National Instruments Corporation Glossary 6527 User Manual...
- Page 43 Glossary optocoupler a device that transfers electrical signals by utilizing light waves to provide coupling with electrical isolation between input and output optical isolation the technique of using an optocoupler to transfer data without electrical continuity, to eliminate high-potential differences and transients Peripheral Component Interconnect—a high-performance expansion bus architecture originally developed by Intel to replace ISA and EISA.
- Page 44 PC, that has the functionality of a classic standalone instrument volts, input high volts, input low input voltage volts, output high volts, output low watts © National Instruments Corporation Glossary 6527 User Manual...
- Page 45 1-6 change notification example, 4-6 purpose and use, 4-5 to 4-6 clocks, for digital filtering, 4-4 to 4-5 © National Instruments Corporation CompactPCI, using with PXI, 1-2 ComponentWorks software, 1-4 configuration, 2-2 connector. See I/O connector. conventions used in manual, x...
- Page 46 LabVIEW software, 1-3 LabWindows/CVI software, 1-3 manual. See documentation. National Instruments application software, 1-3 to 1-4 National Instruments Web support, B-1 to B-2 NI-DAQ driver software, 1-4 to 1-5 online problem-solving and diagnostic resources, B-1 optical isolation circuitry, 4-3 optically isolated inputs, 3-7 to 3-9...
- Page 47 A-3 power requirements, A-2 relay outputs, A-2 safety, A-3 technical support resources, B-1 to B-2 unpacking 6527 devices, 1-3 Web support from National Instruments, B-1 to B-2 online problem-solving and diagnostic resources, B-1 software-related resources, B-2 Worldwide technical support, B-2...