PXI-2503 Relay Replacement
- Updated2025-01-23
- 2 minute(s) read
PXI-2503 Relay Replacement
The module uses electromechanical armature relays.
Replacement Relay | Part Number |
---|---|
NEC-TOKIN | EF2-4.5NUX-L6 |
M3 Distribution (10 relays) | 197488A-01 |
Complete the following steps to replace a failed relay.
Locate the Relay
- 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.
- Locate the relay you want to replace. Refer to the hardware diagram in PXI-2503
Overview and the following figure and table for relay locations.
Relay Name Reference Designator CH0 K32 CH1 K1 CH2 K2 CH3 K3 CH4 K4 CH5 K5 CH6 K6 CH7 K7 CH8 K8 CH9 K9 CH10 K10 CH11 K11 CH12 K12 k13 K12 CH13 K13 CH14 K14 CH15 K15 CH16 K16 CH17 K17 CH18 K18 CH19 K19 CH20 K20 CH21 K21 CH22 K22 CH23 K23 BC01 K24 BC23 K25 BC02 K26 CJTEMP K27 1WIRE K28 HLSEL K29 AB0 K30 AB2 K31 - 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). Green labels indicate the board was assembled using lead-free solder (Sn 96.5 Ag 3.0 Cu 0.5). Lead-free assemblies have assembly numbers ending in L.
Replace the Relay
Note NI recommends using lead-free
solder for relay replacement on lead-free assemblies, and lead solder for relay
replacement on lead assemblies.
Note Do not rework lead assemblies using
a lead-free work station. Lead solder from the unit could contaminate the
station.
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 that you have the following items:
- Temperature-regulated soldering iron set to 316 °C (600 °F) for lead solder rework or 371 °C (700 °F) for lead-free solder rework
- 63/37 Tin/Lead solder (flux core) for lead solder rework
- 96.5/3.0/0.5 Tin/Silver/Copper solder (flux core) for lead-free solder rework
- Solder wick
- Fine pick
- Isopropyl alcohol
- Cotton swabs
Replace the relay as you would any other through-hole part.
Note You can use the Switch Soft Front Panel to reset the relay count after you have
replaced a failed relay.