NI PXI-2529 Relay Replacement

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NI PXI-2529 Relay Replacement

The NI PXI-2529 uses electromechanical armature relays.

Refer to the following table for information about ordering replacement relays.

Relay Manufacturer Part
Aromat (NAiS) AGQ210A4H

Complete the following sets of steps to disassemble your module, replace a failed relay, and reassemble your module.

Disassemble the Module

  1. Ground yourself using a grounding strap or a ground connected to your PXI chassis.
    Note  Properly grounding yourself prevents damage to your module from electrostatic discharge.
  2. Locate the relay you want to replace.
    1. Determine the channel name for the relay using the Bank Connection Diagram for your topology.
    2. Match the channel name to its corresponding relay name using the following tables.

      Daughterboard Relay Locations (Top View)

      Channel
      Name      		 Relay
      Name      		 Channel
      Name      		 Relay
      Name      		 Channel
      Name      		 Relay
      Name      		 Channel
      Name      		 Relay
      Name
      B0ROC0 K72 B0R1C0 K80 B0R2CO K88 B0R3C0 K96
      B0ROC1 K71 B0R1C1 K79 B0R2C1 K87 B0R3C1 K95
      B0ROC2 K70 B0R1C2 K78 B0R2C2 K86 B0R3C2 K94
      B0ROC3 K69 B0R1C3 K77 B0R2C3 K85 B0R3C3 K93
      B0ROC4 K1 B0R1C4 K9 B0R2C4 K17 B0R3C4 K25
      B0ROC5 K2 B0R1C5 K10 B0R2C5 K18 B0R3C5 K26
      B0ROC6 K3 B0R1C6 K11 B0R2C6 K19 B0R3C6 K27
      B0ROC7 K4 B0R1C7 K12 B0R2C7 K20 B0R3C7 K28
      B0ROC8 K68 B0R1C8 K76 B0R2C8 K84 B0R3C8 K92
      B0ROC9 K67 B0R1C9 K75 B0R2C9 K83 B0R3C9 K91
      B0ROC10 K66 B0R1C10 K74 B0R2C10 K82 B0R3C10 K90
      B0ROC11 K65 B0R1C11 K73 B0R2C11 K81 B0R3C11 K89
      B0ROC12 K5 B0R1C12 K13 B0R2C12 K21 B0R3C12 K29
      B0ROC13 K6 B0R1C13 K14 B0R2C13 K22 B0R3C13 K30
      B0ROC14 K7 B0R1C14 K15 B0R2C14 K23 B0R3C14 K31
      B0ROC15 K8 B0R1C15 K16 B0R2C15 K24 B0R3C15 K32

      Daughterboard Relay Locations (Bottom View)

      Channel
      Name      		 Relay
      Name      		 Channel
      Name      		 Relay
      Name      		 Channel
      Name      		 Relay
      Name      		 Channel
      Name      		 Relay
      Name
      B1ROC0 K104 B1R1C0 K112 B1R2CO K120 B1R3C0 K128
      B1ROC1 K103 B1R1C1 K111 B1R2C1 K119 B1R3C1 K127
      B1ROC2 K102 B1R1C2 K110 B1R2C2 K118 B1R3C2 K126
      B1ROC3 K101 B1R1C3 K109 B1R2C3 K117 B1R3C3 K125
      B1ROC4 K33 B1R1C4 K41 B1R2C4 K49 B1R3C4 K57
      B1ROC5 K34 B1R1C5 K42 B1R2C5 K50 B1R3C5 K58
      B1ROC6 K35 B1R1C6 K43 B1R2C6 K51 B1R3C6 K59
      B1ROC7 K36 B1R1C7 K44 B1R2C7 K52 B1R3C7 K60
      B1ROC8 K100 B1R1C8 K108 B1R2C8 K116 B1R3C8 K124
      B1ROC9 K99 B1R1C9 K107 B1R2C9 K115 B1R3C9 K123
      B1ROC10 K98 B1R1C10 K106 B1R2C10 K114 B1R3C10 K122
      B1ROC11 K97 B1R1C11 K105 B1R2C11 K113 B1R3C11 K121
      B1ROC12 K37 B1R1C12 K45 B1R2C12 K53 B1R3C12 K61
      B1ROC13 K38 B1R1C13 K46 B1R2C13 K54 B1R3C13 K62
      B1ROC14 K39 B1R1C14 K47 B1R2C14 K55 B1R3C14 K63
      B1ROC15 K40 B1R1C15 K48 B1R2C15 K56 B1R3C15 K64
    3. Use the relay name to locate the relay on the daughterboard.
      Note  Relay names are printed on the PCB.
  3. To replace relay K1, K8, K9, K16, K17, K24, K25, K32, K33, K40, K41, K48, K49, K56, K57, or K64, remove the four screws and two lead covers that secure the daughterboard to the switch assembly.

    1 Screws
    2 Lead Covers
    3 Daughterboard
  4. To gain access the bottom of the daughterboard, disconnect the PCB interconnect cable by lifting the PCB cable latch on the J1 connector.

    1 PCB Interconnect Cable
    2 PCB Cable Latch
    3 J1 Connector

Replace the Relay

Make sure you have the following:

  • Temperature-regulated soldering iron set to 300 °C
  • 60/40 Lead/Tin solder (flux core)
  • Solder wick
  • Fine pick
  • Isopropyl alcohol
  • Cotton swabs

If you have a surface mount rework station, replace the relay as you would any other surface mount part. Otherwise, complete the following steps to replace the relay:

  1. Use the soldering iron and solder wick to remove as much solder from the relay pads as possible. Do not leave the soldering iron on any lead for more than 5 seconds.
    Note  If it is necessary to reapply the soldering iron to the pad, allow the connection to cool completely before reapplying the soldering iron.
  2. Apply heat to the pads one at a time, and use the pick to gently pry the relay pins from the pads. Make sure that the solder is molten before prying.
    Caution  Using excessive force on a soldered pad can result in lifting the PCB trace and ruining the daughterboard.
  3. Remove the relay.
  4. Clean the pads with isopropyl alcohol and cotton swabs.
  5. Place the new relay on the PCB pads and solder.
  6. Remove the excess flux with isopropyl alcohol and cotton swabs.
    Caution  Do not use flux remover to clean the board after relay replacement.

Reassemble the Module


Complete the Disassemble the Module steps in reverse order to reassemble your module.

Tip  In NI-SWITCH 3.1 or later, you can use the Switch Soft Front panel to reset the relay count after you have replaced a failed relay.
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