NI PXI-2564 Relay Replacement

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NI PXI-2564 Relay Replacement

The NI PXI-2564 uses electromechanical armature relays.

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

Relay Manufacturer Part Number
Aromat (NAiS) DSP1a-DC5V

Relay Kit Part Number
National Instruments (16 relays) 777880-01

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


  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. Refer to the following figure and table for relay locations.

    Channel
    Name
    Relay
    Name
    CH0 K0
    CH1 K1
    CH2 K2
    CH3 K3
    CH4 K4
    CH5 K5
    CH6 K6
    CH7 K7
    CH8 K8
    CH9 K9
    CH10 K10
    CH11 K11
    CH12 K12
    CH13 K13
    CH14 K14
    CH15 K15

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.
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.