Replace the Relay

The PXIe-2532B uses lead-free assemblies.
Note NI recommends using lead-free solder for relay replacement on lead-free assemblies.
Note If a lead-free assembly is reworked with lead solder, label the assembly to indicate this condition. This rework can prevent the same unit from being reworked later on a lead-free solder station, because it could contaminate the station.

Make sure you have the following items:

  • Hot air rework station with hot air gun set to 371 °C (700 °F) for lead-free solder rework
  • Temperature-regulated soldering iron set to 371 °C (700 °F) for lead-free solder rework
  • 96.5/3.0/0.5 Tin/Silver/Copper solder (flux core) for lead-free solder rework
  • Fine tweezers
  1. Apply heat with the hot air gun for 30 to 45 seconds in a circular motion around the relay, keeping the hot air gun 0.75 to 1 inch (1.91 to 2.54 cm) above the daughterboard.
  2. Gently lift the relay with tweezers to remove it from the PCB. If the relay does not lift easily, apply hot air in a circular motion around the relay two to three times and gently try to lift the relay again. Repeat until the solder reflows and the relay lifts easily.
  3. Use the soldering iron to tin the leads of the new relay.
  4. Use the soldering iron to create a uniform distribution of solder on the pads of the daughterboard PCB.
  5. Use the hot air gun to heat the PCB and the relay leads.
  6. Hold the new relay in place on the board with the tweezers while using the hot air gun to apply heat in a circular motion until the solder reflows.