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NI PXIe-2527 User Manual

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PXIe-2527 User
Manual
2025-04-10

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Summary of Contents for NI PXIe-2527

  • Page 1 PXIe-2527 User Manual 2025-04-10...

  • Page 2: Table Of Contents

    Connecting Signals to PXIe-2527 ..........43 Measuring Thermocouples Using PXIe-2527 and TB-2627 ......48 Maintaining the PXIe-2527 .

  • Page 3: Pxie-2527 User Manual

    PXIe-2527 PXIe-2527 User Manual User Manual The PXIe-2527 User Manual provides detailed descriptions of the product functionality and the step-by-step processes for use. Looking For Something Else? For information not found in the User Manual for your product, such as specifications and API reference, browse Related Information .

  • Page 4: Pxie-2527 Overview

    • Provides onboard relay counting for relay monitoring and deterministic operation with hardware triggers to improve test throughput Driver Support NI recommends that you use the newest version of the driver for your module. Table 1. Earliest Driver Version Support Module...

  • Page 5: Components Of A Pxie-2527 System

    Components of a Components of a PXIe-2527 PXIe-2527 System System The PXIe-2527 is designed for use in a system that includes other hardware components, drivers, and software. Notice A system and the surrounding environment must meet the requirements defined in the PXIe-2527 Specifications .
  • Page 6 Accessories for recommended cables and accessories and guidance. NI-SWITCH Driver Instrument driver software that provides functions to interact with the PXIe-2527 and execute measurements using the PXIe-2527. NI Applications NI-SWITCH offers driver support for the following ADEs (application development environments): •...

  • Page 7: Cables And Accessories

    NI Switches Cable and Accessory Compatibility Programming Options You can control the PXIe-2527 interactively using the NI-SWITCH Soft Front Panel (SFP), or you can use the NI-SWITCH instrument driver to program the PXIe-2527 in the supported ADE of your choice. © National Instruments...
  • Page 8 Components of a PXIe-2527 System • NI-SWITCH SFP – provides a graphical interface for controlling and viewing the state of the PXIe-2527. You can access the NI-SWITCH SFP in any of the following ways: ◦ From the Windows Start menu, select National Instruments » NI-SWITCH Soft Front Panel ◦...

  • Page 9: Pxie-2527 Theory Of Operation

    PXIe-2527 Theory of Operation PXIe-2527 PXIe-2527 Theory of Operation Theory of Operation The following diagram illustrates the design of the PXIe-2527. Refer to the component sections to understand the design of each component. Figure 1. PXIe-2527 Block Diagram Clock CH0+/− . .
  • Page 10 These two fused power supplies are also routed to the flexible printed circuit (FPC) daughterboard connector. The PXIe-2527 daughterboard does not use the 12 V. Instead, a 12 V to 5 V DC-DC converter supplies 5 V at 3.2 A to the daughterboard.

  • Page 11: Pxie-2527 Daughterboard

    When individual relay commands are executed, the PXIe-2527 updates the FPGA SRAM copies of the relay operation counts. To protect the relay operation counts from resets or power cycles, the PXIe-2527 transfers the counts back to the EEPROM regularly.
  • Page 12 To open or close a relay, you can apply a voltage of one polarity or the other across the relay coils. Relay Configuration The following list describes the 6 configuration relays on the PXIe-2527. Table 4. Configuration Relays in PXIe-2527 Configuration Relay...
  • Page 13 PXIe-2527 Theory of Operation Isolated Power Supply The PXIe-2527 is designed for CAT I isolation at 300 V continuous and 1500 V impulse channel-to-channel and channel-to-ground. This design means the power lines and CPLD inputs from the motherboard must be isolated from the daughterboard.
  • Page 14 PXIe-2527 Theory of Operation Figure 1. TB-2627 Temperature Sensing Circuit Related reference: • Measuring Thermocouples Using PXIe-2527 and TB-2627 Related information: • PXIe-2527 Specifications ni.com...

  • Page 15: Pxie-2527 Topology

    PXIe-2527 Topology PXIe-2527 PXIe-2527 Topology Topology The following table lists the topologies supported by the module. Each topology supports immediate operation modes. Topology Software Name 1-wire 64x1 Multiplexer 2527/1-Wire 64x1 Mux(NISWITCH_TOPOLOGY_2527_1_WIRE_64X1_MUX) 1-wire Dual 32x1 2527/1-Wire Dual 32x1 Multiplexer Mux(NISWITCH_TOPOLOGY_2527_1_WIRE_DUAL_32X1_MUX) 2-wire 32x1 Multiplexer...
  • Page 16 PXIe-2527 Topology Making a Connection To route signal connected to CH2 to COM0, use any of the following operations: • In Scan List mode, use the scanning command ch2->com0;. • In LabVIEW, use the niSwitch Connect Channels VI with ch2 and com0 as parameters.
  • Page 17 PXIe-2527 Topology Software Name Pin Number Software Name Pin Number ch20 ch56 ch21 ch57 ch22 ch58 ch23 ch59 ch24 ch60 ch25 ch61 ch26 ch62 ch27 ch63 ch28 com0 ch29 — — ch30 — — ch31 — — ch32 — —...

  • Page 18: 1-Wire Dual 32×1 Multiplexer Topology

    PXIe-2527 Topology Note In the 1-wire 64×1 multiplexer topology, do not connect to A18 or B18, as they are internally connected to certain routes. 1-Wire Dual 32×1 Multiplexer Topology 1-Wire Dual 32×1 Multiplexer Topology 1-Wire Dual 32×1 Multiplexer com0 ch15...
  • Page 19 PXIe-2527 Topology Table 7. Pinout Software Name Pin Number Software Name Pin Number ch36 ch37 ch38 ch39 ch40 ch41 ch42 ch43 ch44 ch45 ch10 ch46 ch11 ch47 ch12 ch48 ch13 ch49 ch14 ch50 ch15 ch51 ch16 ch52 ch17 ch53 ch18...

  • Page 20: 2-Wire 32×1 Multiplexer Topology

    PXIe-2527 Topology Software Name Pin Number Software Name Pin Number ch26 ch62 ch27 ch63 ch28 com0 ch29 com1 ch30 — — ch31 — — ch32 — — ch33 — — ch34 — — ch35 — — Table 10. Additional Pin References...
  • Page 21 PXIe-2527 Topology – com0 – – ch31 – cjtemp Making a Connection To route signal connected to CH2+ to COM0+, and signal connected to CH2– to COM0–, use any of the following operations: • In Scan List mode, use the scanning command ch2->com0;.

  • Page 22: 2-Wire Dual 16×1 Multiplexer Topology

    PXIe-2527 Topology Pin Number Pin Number Software Name Software Name – – ch11 ch29 ch12 ch30 ch13 ch31 ch14 com0 ch15 cjtemp ch16 — — — ch17 — — — Table 10. Additional Pin References Module Connector Pin Number Signal Name com1+ com1–...
  • Page 23 PXIe-2527 Topology – – com0 – ch15 – cjtemp ch16 – ch17 – com1 – ch31 – Making a Connection To route signal connected to CH2+ to COM0+, and signal connected to CH2– to COM0–, use any of the following operations: •...

  • Page 24: 4-Wire 16×1 Multiplexer Topology

    PXIe-2527 Topology Pin Number Pin Number Software Name Software Name – – ch21 ch22 ch23 ch24 ch25 ch26 ch27 ch10 ch28 ch11 ch29 ch12 ch30 ch13 ch31 ch14 com0 ch15 com1 ch16 cjtemp ch17 4-Wire 16×1 Multiplexer Topology 4-Wire 16×1 Multiplexer Topology 4-Wire 16×1 Multiplexer...
  • Page 25 PXIe-2527 Topology A– B– A– A– B– com0 B– A– ch15 B– cjtemp Making a Connection Both the scanning command, ch2->com0;, and the immediate operation, niSwitch Connect Channels VI or theniSwitch_Connect function with parameters ch2 and com0, result in the following connections: •...

  • Page 26: Independent Topology

    PXIe-2527 Topology Pin Number Software Name A– B– ch10 ch11 ch12 ch13 ch14 ch15 com0 cjtemp — — Independent Topology Independent Topology Independent KHLSELECT0 PCOM0PLUS ICOM0PLUS PCOM0MINUS KCJTEMP ICOM0 PCOM0 KREF0 PCOM0MINUS ICOM0MINUS 1WREF0 COM0 CH15 CJTEMP – 1WREF0 (in TB-2627)
  • Page 27 PXIe-2527 Topology Making a Connection With the independent topology, you can let NI-SWITCH determine the path between two specified channels by setting the intermediate channels as reserved for routing and using the niSwitch Connect Channels VI or the niSwitch_Connect function, or you can control individual relays using the niSwitch Relay Control VI or the niSwitch_RelayControl function.
  • Page 28 PXIe-2527 Topology Table 14. Valid Internal Channel Names pcom0 pcom1 1wref0 1wref1 cjtemp icom0 pcom1plus pcom1minus icom0plus icom0minus pcom0plus pcom0minus com1plus com1minus ni.com...

  • Page 29: Pxie-2527 Front Panel

    PXIe-2527 Front Panel PXIe-2527 Front Panel PXIe-2527 Front Panel Figure 1. PXIe-2527 Front Panel PXIe-2527 300 V CAT I © National Instruments...

  • Page 30: Pxie-2527 Pinout

    PXIe-2527 Pinout PXIe-2527 PXIe-2527 Pinout Pinout The following figure shows the terminals on the PXIe-2527 connector. Figure 1. PXIe-2527 Pinout ni.com...
  • Page 31 PXIe-2527 Pinout Table 15. 1-Wire 64×1 Multiplexer Signal Descriptions Signal Description Channel terminals COM0+ Routing destination for all channel terminals COM0- Routing destination for the 1WREF0 lead Table 16. 1-Wire Dual 32×1 Multiplexer Signal Descriptions Signal Description CH0 through CH31...
  • Page 32 PXIe-2527 Pinout Signal Description COM0- Routing destination for CH0- through CH15- COM1+ Routing destination for CH16+ through CH31+ COM1- Routing destination for CH16- through CH31- Table 19. 4-Wire 16×1 Multiplexer Signal Descriptions Signal Description CH0A+ through CH15A+ Channel terminals that route to COM0+...

  • Page 33: Ni-Switch Examples

    NI Example Finder The NI Example Finder is a utility that organizes examples into categories and allows you to browse and search installed examples. For example, search for "SWITCH" to locate all NI-SWITCH examples. You can see descriptions and compatible hardware models for each example or see all the examples compatible with one particular hardware model.
  • Page 34 NI-SWITCH Examples Related information: • Python NI-SWITCH Examples ni.com...

  • Page 35: Pxie-2527 Installation And Configuration

    PXIe-2527 Installation and Configuration PXIe-2527 PXIe-2527 Installation and Configuration Installation and Configuration Complete the following steps to install the PXIe-2527 into a chassis and prepare it for use. Unpacking the Kit Preparing the Environment Installing the Software Installing a PXIe-2527 into the Chassis...

  • Page 36: Preparing The Environment

    Figure 1. PXIe-2527 Kit Contents 1. PXIe-2527 Module 2. Documentation Preparing the Environment Preparing the Environment Ensure that the environment in which you are using the PXIe-2527 meets the following specifications. PXI Express Modules Operating Environment Ambient temperature range 0 °C to 40 °C...

  • Page 37: Installing The Software

    Chassis You must install the software before installing the hardware. Before you install the PXIe-2527, refer to the guidelines in Maintain Forced-Air Cooling Note to Users to ensure that the PXIe-2527 can cool itself effectively. © National Instruments...
  • Page 38 PXIe-2527. 2. Power off the chassis. 3. If the NI PXI/PXI Express chassis has multiple fan speed settings, ensure that the fans are set to high. 4. Position the chassis so that inlet and outlet vents are not obstructed.
  • Page 39 7. Remove the filler panel of an unused PXI/PXI Express slot. 8. Touch any metal part of the chassis to discharge static electricity. 9. Ensure that the ejector handle of the PXIe-2527 is in the unlatched (down) position and swings freely.

  • Page 40: Verifying The Installation

    1. Open Hardware Configuration Utility. The PXIe-2527 should appear in the system pane automatically. 2. Record the name Hardware Configuration Utility assigns to the PXIe-2527 or, if desired, provide a custom name to the PXIe-2527. Use this name when programming the PXIe-2527.
  • Page 41 Devices and Interfaces. b. Expand the Chassis tree to see the list of installed hardware and press F5 to refresh the list. 2. If the PXIe-2527 is still not listed, power off the system, ensure that all hardware is © National Instruments...
  • Page 42 5. Restart your computer. What Should I Do if the PXIe-2527 Fails the Self-Test? 1. Reset the PXIe-2527 through Hardware Configuration Utility or MAX and then perform the self-test again. 2. Restart the system, and then perform the self-test again.

  • Page 43: Connecting Signals To Pxie-2527

    Connecting Signals to Connecting Signals to PXIe-2527 PXIe-2527 You can connect signals to the PXIe-2527 using the TB-2627, or you can make custom signal connections. Connecting Signals to PXIe-2527 using TB-2627 You can use the NI TB-2627, a front-mounting terminal block, to quickly connect signals the PXIe-2527 for prototyping applications or system deployment.
  • Page 44 Connecting Signals to PXIe-2527 Figure 8. TB-2627 Components 1. Terminal Block Top Cover 2. Top Cover Screw 3. Safety Ground Lug 4. Chassis Screws 5. Strain-Relief Screws 6. Strain-Relief Opening 7. Strain-Relief Bar ni.com...
  • Page 45 IF HIGH VOLTAGE IS PRESENT, CONNECT A SAFETY WARNING: EARTH GROUND TO THE SAFETY GROUND LUG. 2. Attach the TB-2627 cover. 3. Connect the TB-2627 directly to the PXIe-2527 with the mating connectors as shown in the following figure: © National Instruments...
  • Page 46 A custom terminal block allows for a wide variety of routing options and multiplexer topologies. To determine how the pins on the PXIe-2527 map to the channels of a particular multiplexer topology, refer to PXIe-2527 Topology and select the desired topology.
  • Page 47 Connecting Signals to PXIe-2527 Connector Manufacturer Part Number 779311-01 533285-1 533285-1 Related reference: • PXIe-2527 Topology © National Instruments...

  • Page 48: Measuring Thermocouples Using Pxie-2527 And Tb-2627

    PXIe-2527 and TB-2627 and TB-2627 You can use the PXIe-2527 and the NI TB-2627 to measure thermocouples. When measuring thermocouples, you must account for error in the measurements. NI software can convert a thermocouple voltage to the thermocouple temperature. Visit ni.com/examples...
  • Page 49 Measuring Thermocouples Using PXIe-2527 and TB-2627 EMF value. For optimal thermocouple measurement performance ( V 2.5 µV), power down the latching relays of the PXIe-2527. For more information about powering down latching relays, refer to the Power Down Latching Relays After Debounce property in NI-SWITCH or the Power Down Latching Relays After Settling property in NI-DAQmx.
  • Page 50 Measuring Thermocouples Using PXIe-2527 and TB-2627 Determining the Thermocouple Error Independent of the PXIe-2527/TB-2627 system, thermocouple error is the greater of the following values: ± a temperature range or ± a percent of the measurement. In the example, a standard grade K-type thermocouple is used to measure 200 °C. The Temperature Handbook lists the error for a standard grade K-type thermocouple as ±2.2 °C or ±0.75% of the measurement temperature.

  • Page 51: Maintaining The Pxie-2527

    Note Properly grounding yourself prevents damage to your PXIe-2527 from electrostatic discharge. 2. Refer to PXIe-2527 Topology and the following table to locate the relay you want to replace. Note Use the numbers printed on the board to verify the revision letter of the PXIe-2527.
  • Page 52 Maintaining the PXIe-2527 Relay Name Reference Designator (Revision B) Reference Designator (Revision A) ni.com...
  • Page 53 Maintaining the PXIe-2527 Relay Name Reference Designator (Revision B) Reference Designator (Revision A) kbc01 khlselect0 kref0 khlselect1 kref1 kcjtemp 3. Locate the assembly and serial number labels on the board with the relay you want to replace. White labels indicate the board was assembled using lead solder (Sn 63 Pb 37).
  • Page 54 Maintaining the PXIe-2527 Note NI recommends using a lead-free solder for relay replacement on lead- free assemblies, and lead solder for relay replacement on lead assemblies. Notice Do not rework lead assemblies using a lead-free work station. Lead solder from the unit could contaminate the station.

  • Page 55: Improving Relay Life For Pxie-2527

    • Use the niSwitch Get Relay Count VI or the niSwitch_GetRelayCount function to track relay usage. You can then analyze the relay counts on your PXIe-2527 to better manage the use of each relay. • Edit test sequences to reduce the number of switching cycles.

  • Page 56: Cleaning The Pxie-2527 System

    PXIe-2527 System System NI recommends the following to clean and maintain your instrument's system: • Clean the fan filters on the chassis regularly to prevent fan blockage and to ensure efficient air circulation. Cleaning frequency depends on the amount of use and the operating environment.
  • Page 57 Maintaining the PXIe-2527 other recommended maintenance, refer to the chassis user documentation. • Clean the hardware with a soft, nonmetallic brush. Make sure that the hardware is completely dry and free from contaminants before returning it to service. © National Instruments...

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