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NI PXIe-2527 Features

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PXIe-2527
Features
2024-02-01

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Summary of Contents for NI PXIe-2527

  • Page 1 PXIe-2527 Features 2024-02-01...
  • Page 2 PXIe-2527 Overview........
  • Page 3 PXIe-2527 Features PXIe-2527 Overview PXIe-2527 Hardware Diagram KHLSELECT0 CH0 + KCJTEMP CH0 – KREF0 COM0 CH15 + CH15 – CJTEMP (in TB-2627) 1WREF0 KBC01 KHSELECT1 CH16 + CH16 – COM1 KREF1 CH31 + CH31 – 1WREF1 Relay names are the same for every topology.
  • Page 4 PXIe-2527 Features Table 1. 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 ni.com...
  • Page 5 PXIe-2527 Features Table 2. 1-Wire Dual 32×1 Multiplexer Signal Descriptions Signal Description CH0 through CH31 Channel terminals that route to COM0+ CH 32 through CH63 Channel terminals that route to COM1+ COM0+ Routing destination for CH0 through CH31 COM1+ Routing destination for CH32 through CH63...
  • Page 6 PXIe-2527 Features Signal Description COM0+ Routing destination for all positive channels (A and B) COM0- Routing destination for all negative channels (A and B) Table 6. Independent Topology Signal Descriptions Signal Description Channel terminals COM0+ Routing destination for all channel terminals...
  • Page 7 PXIe-2527 Features 1-Wire 64×1 Multiplexer Topology 1-Wire 64×1 Multiplexer com0 ch61 ch62 ch63 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: signal connected to CH2 is routed to COM0 ■...
  • Page 8 PXIe-2527 Features Software Name Pin Number Software Name Pin Number ch43 ch44 ch45 ch10 ch46 ch11 ch47 ch12 ch48 ch13 ch49 ch14 ch50 ch15 ch51 ch16 ch52 ch17 ch53 ch18 ch54 ch19 ch55 ch20 ch56 ch21 ch57 ch22 ch58 ch23...
  • Page 9 PXIe-2527 Features Table 8. Additional Pin References Module Connector Pin Number Signal Name com0– com1+ com1– 1wref0 1wref1 cjtemp+ cjtemp– Note In the 1-wire 64×1 multiplexer topology, do not connect to A18 or B18, as they are internally connected to certain routes.
  • Page 10 PXIe-2527 Features com0 ch15 ch16 ch17 ch18 ch31 cjtemp ch32 ch33 ch34 com1 ch47 ch48 ch49 ch50 ch63 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...
  • Page 11 PXIe-2527 Features Software Name Pin Number Software Name Pin Number ch40 ch41 ch42 ch43 ch44 ch45 ch10 ch46 ch11 ch47 ch12 ch48 ch13 ch49 ch14 ch50 ch15 ch51 ch16 ch52 ch17 ch53 ch18 ch54 ch19 ch55 ch20 ch56 ch21 ch57...
  • Page 12 PXIe-2527 Features Software Name Pin Number Software Name Pin Number ch35 — — Table 10. Additional Pin References Module Connector Pin Number Signal Name com0– com1+ 1wref0 1wref1 cjtemp+ cjtemp- 2-Wire 32×1 Multiplexer Topology 2-Wire 32×1 Multiplexer – com0 –...
  • Page 13 PXIe-2527 Features Table 11. Pinout Software Name Pin Number Software Pin Number Name – – ch18 ch19 ch20 ch21 ch22 ch23 ch24 ch25 ch26 ch27 ch10 ch28 ch11 ch29 ch12 ch30 ch13 ch31 ch14 com0 ch15 cjtemp ch16 — —...
  • Page 14 PXIe-2527 Features 2-Wire Dual 16×1 Multiplexer Topology 2-Wire Dual 16×1 Multiplexer – – com0 – ch15 – cjtemp ch16 – ch17 – com1 – ch31 – 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...
  • Page 15 PXIe-2527 Features Table 13. Pinout Software Name Pin Number Software Pin Number Name – – ch18 ch19 ch20 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...
  • Page 16 PXIe-2527 Features 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: signal connected to CH2A+ is routed to COM0A+ ■...
  • Page 17 PXIe-2527 Features Software Name Pin Number A– B– ch10 ch11 ch12 ch13 ch14 ch15 com0 cjtemp — — Independent Topology Independent KHLSELECT0 PCOM0PLUS ICOM0PLUS PCOM0MINUS KCJTEMP ICOM0 PCOM0 KREF0 PCOM0MINUS ICOM0MINUS 1WREF0 COM0 CH15 CJTEMP – 1WREF0 (in TB-2627) KBC01...
  • Page 18 PXIe-2527 Features 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 19 PXIe-2527 Thermocouple Measurement The module and the NI TB-2627 can measure thermocouples. When measuring thermocouples, be sure to account for error in the measurements. The total error in thermocouple measurement is the sum of the system error (determined by the thermal EMF of the module and the CJC temperature of the TB-2627) and the thermocouple error (determined by the type of thermocouple used).
  • Page 20 µV), power down the latching relays of the module. 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 21 PXIe-2527 Features Example: Measuring a K-type thermocouple at 200 °C with a CJC temperature of 25 °C, the system error of the module/TB-2627 is calculated in the following example. Assuming typical thermal EMF (2.5 µV), first calculate the error due to thermal EMF using Equation 1.
  • Page 22 = 0.56 °C + 2.2 °C = 2.76 °C Assuming typical thermal EMF, the total error in thermocouple measurement at 200 °C for the module/TB-2627 with a K-type thermocouple is ±2.76 °C. PXIe-2527 Relay Replacement The module uses electromechanical armature relays. Replacement Relay Part Number...

  • Page 23: Disassemble The Module

    Note Use the numbers printed on the board to verify the revision letter of the NI 2527. (Revision B = ASSY192245B-01; Revision A = ASSY192245A-01.) Use the revision letter to determine the correct reference designator for the relay you want to replace.
  • Page 24 PXIe-2527 Features Relay Name Reference Designator Reference Designator (Revision B) (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 25 Isopropyl alcohol ■ Cotton swabs ■ Note NI recommends using 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 26 Disassemble the Module steps in reverse order to reassemble your module. Use the NI-SWITCH Switch Soft Front Panel to reset the relay count after you have replaced a failed relay. Refer to the Switch Soft Front Panel Help for more information.