PXI-2532 Relay Replacement
- Updated2023-07-13
- 10 minute(s) read
PXI-2532 Relay Replacement
The module uses electromechanical uses reed relays.
| Relay Manufacturer | Part |
|---|---|
| Meder | CRR05-1A |
Disassemble the Module
- 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.
- Determine the relay name for the relay using the Bank Connection Diagram for your topology.
- Match the relay name to its corresponding reference designator and
locate the relay using the following figures and tables.Note The reference designator locations for the top and bottom mezzanine boards are identical. Relays are located on both sides of each mezzanine board.
The following figure illustrates relay locations on the side of each mezzanine board that has a notch in the top left corner.
The following figure illustrates relay locations on the side of each mezzanine board that has a notch in the top right corner.
Table 1. Top Mezzanine Board Relay Locations Relay Name Reference Designator Relay Name Reference Designator Relay Name Reference Designator Relay Name Reference Designator B8R0C0 K144 B10R0C0 K176 B12R0C0 K193 B14R0C0 K225 B8R0C1 K143 B10R0C1 K175 B12R0C1 K194 B14R0C1 K226 B8R0C2 K142 B10R0C2 K174 B12R0C2 K195 B14R0C2 K227 B8R0C3 K141 B10R0C3 K173 B12R0C3 K196 B14R0C3 K228 B8R0C4 K140 B10R0C4 K172 B12R0C4 K197 B14R0C4 K229 B8R0C5 K139 B10R0C5 K171 B12R0C5 K198 B14R0C5 K230 B8R0C6 K138 B10R0C6 K170 B12R0C6 K199 B14R0C6 K231 B8R0C7 K137 B10R0C7 K169 B12R0C7 K200 B14R0C7 K232 B8R0C8 K136 B10R0C8 K168 B12R0C8 K201 B14R0C8 K233 B8R0C9 K135 B10R0C9 K167 B12R0C9 K202 B14R0C9 K234 B8R0C10 K134 B10R0C10 K166 B12R0C10 K203 B14R0C10 K235 B8R0C11 K133 B10R0C11 K165 B12R0C11 K204 B14R0C11 K236 B8R0C12 K132 B10R0C12 K164 B12R0C12 K205 B14R0C12 K237 B8R0C13 K131 B10R0C13 K163 B12R0C13 K206 B14R0C13 K238 B8R0C14 K130 B10R0C14 K162 B12R0C14 K207 B14R0C14 K239 B8R0C15 K129 B10R0C15 K161 B12R0C15 K208 B14R0C15 K240 B8R1C0 K1 B10R1C0 K33 B12R1C0 K80 B14R1C0 K112 B8R1C1 K2 B10R1C1 K34 B12R1C1 K79 B14R1C1 K111 B8R1C2 K3 B10R1C2 K35 B12R1C2 K78 B14R1C2 K110 B8R1C3 K4 B10R1C3 K36 B12R1C3 K77 B14R1C3 K109 B8R1C4 K5 B10R1C4 K37 B12R1C4 K76 B14R1C4 K108 B8R1C5 K6 B10R1C5 K38 B12R1C5 K75 B14R1C5 K107 B8R1C6 K7 B10R1C6 K39 B12R1C6 K74 B14R1C6 K106 B8R1C7 K8 B10R1C7 K40 B12R1C7 K73 B14R1C7 K105 B8R1C8 K9 B10R1C8 K41 B12R1C8 K72 B14R1C8 K104 B8R1C9 K10 B10R1C9 K42 B12R1C9 K71 B14R1C9 K103 B8R1C10 K11 B10R1C10 K43 B12R1C10 K70 B14R1C10 K102 B8R1C11 K12 B10R1C11 K44 B12R1C11 K69 B14R1C11 K101 B8R1C12 K13 B10R1C12 K45 B12R1C12 K68 B14R1C12 K100 B8R1C13 K14 B10R1C13 K46 B12R1C13 K67 B14R1C13 K99 B8R1C14 K15 B10R1C14 K47 B12R1C14 K66 B14R1C14 K98 B8R1C15 K16 B10R1C15 K48 B12R1C15 K65 B14R1C15 K97 B9R0C0 K160 B11R0C0 K192 B13R0C0 K209 B15R0C0 K241 B9R0C1 K159 B11R0C1 K191 B13R0C1 K210 B15R0C1 K242 B9R0C2 K158 B11R0C2 K190 B13R0C2 K211 B15R0C2 K243 B9R0C3 K157 B11R0C3 K189 B13R0C3 K212 B15R0C3 K244 B9R0C4 K156 B11R0C4 K188 B13R0C4 K213 B15R0C4 K245 B9R0C5 K155 B11R0C5 K187 B13R0C5 K214 B15R0C5 K246 B9R0C6 K154 B11R0C6 K186 B13R0C6 K215 B15R0C6 K247 B9R0C7 K153 B11R0C7 K185 B13R0C7 K216 B15R0C7 K248 B9R0C8 K152 B11R0C8 K184 B13R0C8 K217 B15R0C8 K249 B9R0C9 K151 B11R0C9 K183 B13R0C9 K218 B15R0C9 K250 B9R0C10 K150 B11R0C10 K182 B13R0C10 K219 B15R0C10 K251 B9R0C11 K149 B11R0C11 K181 B13R0C11 K220 B15R0C11 K252 B9R0C12 K148 B11R0C12 K180 B13R0C12 K221 B15R0C012 K253 B9R0C13 K147 B11R0C13 K179 B13R0C13 K222 B15R0C13 K254 B9R0C14 K146 B11R0C14 K178 B13R0C14 K223 B15R0C14 K255 B9R0C15 K145 B11R0C15 K177 B13R0C15 K224 B15R0C15 K256 B9R1C0 K17 B11R1C0 K49 B13R1C0 K96 B15R1C0 K128 B9R1C1 K18 B11R1C1 K50 B13R1C1 K95 B15R1C1 K127 B9R1C2 K19 B11R1C2 K51 B13R1C2 K94 B15R1C2 K126 B9R1C3 K20 B11R1C3 K52 B13R1C3 K93 B15R1C3 K125 B9R1C4 K21 B11R1C4 K53 B13R1C4 K92 B15R1C4 K124 B9R1C5 K22 B11R1C5 K54 B13R1C5 K91 B15R1C5 K123 B9R1C6 K23 B11R1C6 K55 B13R1C6 K90 B15R1C6 K122 B9R1C7 K24 B11R1C7 K56 B13R1C7 K89 B15R1C7 K121 B9R1C8 K25 B11R1C8 K57 B13R1C8 K88 B15R1C8 K120 B9R1C9 K26 B11R1C9 K58 B13R1C9 K87 B15R1C9 K119 B9R1C10 K27 B11R1C10 K59 B13R1C10 K86 B15R1C10 K118 B9R1C11 K28 B11R1C11 K60 B13R1C11 K85 B15R1C11 K117 B9R1C12 K29 B11R1C12 K61 B13R1C12 K84 B15R1C12 K116 B9R1C13 K30 B11R1C13 K62 B13R1C13 K83 B15R1C13 K115 B9R1C14 K31 B11R1C14 K63 B13R1C14 K82 B15R1C14 K114 B9R1C15 K32 B11R1C15 K64 B13R1C15 K81 B15R1C15 K113 Table 2. Bottom Mezzanine Board Relay Locations Relay Name Reference Designator Relay Name Reference Designator Relay Name Reference Designator Relay Name Reference Designator B0R0C0 K144 B2R0C0 K176 B4R0C0 K193 B6R0C0 K225 B0R0C1 K143 B2R0C1 K175 B4R0C1 K194 B6R0C1 K226 B0R0C2 K142 B2R0C2 K174 B4R0C2 K195 B6R0C2 K227 B0R0C3 K141 B2R0C3 K173 B4R0C3 K196 B6R0C3 K228 B0R0C4 K140 B2R0C4 K172 B4R0C4 K197 B6R0C4 K229 B0R0C5 K139 B2R0C5 K171 B4R0C5 K198 B6R0C5 K230 B0R0C6 K138 B2R0C6 K170 B4R0C6 K199 B6R0C6 K231 B0R0C7 K137 B2R0C7 K169 B4R0C7 K200 B6R0C7 K232 B0R0C8 K136 B2R0C8 K168 B4R0C8 K201 B6R0C8 K233 B0R0C9 K135 B2R0C9 K167 B4R0C9 K202 B6R0C9 K234 B0R0C10 K134 B2R0C10 K166 B4R0C10 K203 B6R0C10 K235 B0R0C11 K133 B2R0C11 K165 B4R0C11 K204 B6R0C11 K236 B0R0C12 K132 B2R0C12 K164 B4R0C12 K205 B6R0C12 K237 B0R0C13 K131 B2R0C13 K163 B4R0C13 K206 B6R0C13 K238 B0R0C14 K130 B2R0C14 K162 B4R0C14 K207 B6R0C14 K239 B0R0C15 K129 B2R0C15 K161 B4R0C15 K208 B6R0C15 K240 B0R1C0 K1 B2R1C0 K33 B4R1C0 K80 B6R1C0 K112 B0R1C1 K2 B2R1C1 K34 B4R1C1 K79 B6R1C1 K111 B0R1C2 K3 B2R1C2 K35 B4R1C2 K78 B6R1C3 K110 B0R1C3 K4 B2R1C3 K36 B4R1C3 K77 B6R1C3 K109 B0R1C4 K5 B2R1C4 K37 B4R1C4 K76 B6R1C4 K108 B0R1C5 K6 B2R1C5 K38 B4R1C5 K75 B6R1C5 K107 B0R1C6 K7 B2R1C6 K39 B4R1C6 K74 B6R1C6 K106 B0R1C7 K8 B2R1C7 K40 B4R1C7 K73 B6R1C7 K105 B0R1C8 K9 B2R1C8 K41 B4R1C8 K72 B6R1C8 K104 B0R1C9 K10 B2R1C9 K42 B4R1C9 K71 B6R1C9 K103 B0R1C10 K11 B2R1C10 K43 B4R1C10 K70 B6R1C10 K102 B0R1C11 K12 B2R1C11 K44 B4R1C11 K69 B6R1C11 K101 B0R1C12 K13 B2R1C12 K45 B4R1C12 K68 B6R1C12 K100 B0R1C13 K14 B2R1C13 K46 B4R1C13 K67 B6R1C13 K99 B0R1C14 K15 B2R1C14 K47 B4R1C14 K66 B6R1C14 K98 B0R1C15 K16 B2R1C15 K48 B4R1C15 K65 B6R1C15 K97 B1R0C0 K160 B3R0C0 K192 B5R0C0 K209 B7R0C0 K241 B1R0C1 K159 B3R0C1 K191 B5R0C1 K210 B7R0C1 K242 B1R0C2 K158 B3R0C2 K190 B5R0C2 K211 B7R0C2 K243 B1R0C3 K157 B3R0C3 K189 B5R0C3 K212 B7R0C3 K244 B1R0C4 K156 B3R0C4 K188 B5R0C4 K213 B7R0C4 K245 B1R0C5 K155 B3R0C5 K187 B5R0C5 K214 B7R0C5 K246 B1R0C6 K154 B3R0C6 K186 B5R0C6 K215 B7R0C6 K247 B1R0C7 K153 B3R0C7 K185 B5R0C7 K216 B7R0C7 K248 B1R0C8 K152 B3R0C8 K184 B5R0C8 K217 B7R0C8 K249 B1R0C9 K151 B3R0C9 K183 B5R0C9 K218 B7R0C9 K250 B1R0C10 K150 B3R0C10 K182 B5R0C10 K219 B7R0C10 K251 B1R0C11 K149 B3R0C11 K181 B5R0C11 K220 B7R0C11 K252 B1R0C12 K148 B3R0C12 K180 B5R0C12 K221 B7R0C12 K253 B1R0C13 K147 B3R0C13 K179 B5R0C13 K222 B7R0C13 K254 B1R0C14 K146 B3R0C14 K178 B5R0C14 K223 B7R0C14 K255 B1R0C15 K145 B3R0C15 K177 B5R0C15 K224 B7R0C15 K256 B1R1C0 K17 B3R1C0 K49 B5R1C0 K96 B7R1C0 K128 B1R1C1 K18 B3R1C1 K50 B5R1C1 K95 B7R1C1 K127 B1R1C2 K19 B3R1C2 K51 B5R1C2 K94 B7R1C2 K126 B1R1C3 K20 B3R1C3 K52 B5R1C3 K93 B7R1C3 K125 B1R1C4 K21 B3R1C4 K53 B5R1C4 K92 B7R1C4 K124 B1R1C5 K22 B3R1C5 K54 B5R1C5 K91 B7R1C5 K123 B1R1C6 K23 B3R1C6 K55 B5R1C6 K90 B7R1C6 K122 B1R1C7 K24 B3R1C7 K56 B5R1C7 K89 B7R1C7 K121 B1R1C8 K25 B3R1C8 K57 B5R1C8 K88 B7R1C8 K120 B1R1C9 K26 B3R1C9 K58 B5R1C9 K87 B7R1C9 K119 B1R1C10 K27 B3R1C10 K59 B5R1C10 K86 B7R1C10 K118 B1R1C11 K28 B3R1C11 K60 B5R1C11 K85 B7R1C11 K117 B1R1C12 K29 B3R1C12 K61 B5R1C12 K84 B7R1C12 K116 B1R1C13 K30 B3R1C13 K62 B5R1C13 K83 B7R1C13 K115 B1R1C14 K31 B3R1C14 K63 B5R1C14 K82 B7R1C14 K114 B1R1C15 K32 B3R1C15 K64 B5R1C15 K81 B7R1C15 K113 - Use the reference designator to locate the relay on the mezzanine
board.Note Reference designators are printed on the mezzanine boards.
- Disassemble the module. Refer to Disconnecting the Top Mezzanine Board if the relay you want to replace is located on the top mezzanine board. Refer to Disconnecting the Bottom Mezzanine Board if the relay you want to replace is located on the bottom mezzanine board. Refer to both procedures if you want to replace relays on both boards.
Disconnecting the Top Mezzanine Board
Complete the following steps to disconnect the top mezzanine board from the driver board.
- Remove the top mezzanine board screws.
1 Mezzanine Board Screws 2 Driver Board - Use a plastic screwdriver to gently pry the top mezzanine board from the driver
board, prying a little at each corner for an even distribution of pressure until
the top mezzanine board pops loose. Retain the spacers from between the
boards.
1 Mezzanine Board 3 Plastic Screwdriver 2 Driver Board 4 Spacer
Disconnecting the Bottom Mezzanine
Board
Complete the following steps to disconnect the bottom mezzanine board from the driver board.
- Remove the ejector handle assembly screw.
- Remove the mezzanine board screws.
1 Mezzanine Board Screws 2 Driver Board - Disconnect the PCB interconnect cable by lifting the PCB cable latch on the J2
connector.
1 J2 Connector 3 PCB Cable Latch 2 PCB Interconnect Cable - Separate the daughterboard assembly from the CMI bracket.
- Use a plastic screwdriver to gently pry the bottom mezzanine board from the
driver board, prying a little at each corner for an even distribution of
pressure until the bottom mezzanine board pops loose. Retain the spacers from
between the boards.
1 Driver Board 3 Spacer 2 Bottom Mezzanine Board 4 Plastic Screwdriver
Replace the
Relay
The NI PXI/PXIe-2531 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
- 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.
- 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.
- Use the soldering iron to tin the leads of the new relay.
- Use the soldering iron to create a uniform distribution of solder on the pads of the daughterboard PCB.
- Use the hot air gun to heat the PCB and the relay leads.
- 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.
Reassemble the Module
Note 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. Refer to the Switch Soft Front Panel Help for more
information
Reconnecting
the Top Mezzanine Board
- Align pin holes 179 and 180 on the J4 and J5 connectors of the top mezzanine
board with pins 179 and 180 of the J3 and J4 connectors on the driver board.
Gently fold the mezzanine board over onto the driver board as shown in the
following figure. Leave approximately 6 mm of clearance between the mezzanine
board and the driver board. Do not press the boards together. Note Ensure the black surface mount J2 and J3 connectors on the mezzanine board face away from the driver board, and the notch in the corner of the mezzanine board faces the bottom front of the module.
1 Driver Board J4 Connector 3 Mezzanine Board J4 Connector 2 Driver Board J3 Connector 4 Mezzanine Board J5 Connector - Replace the spacers between the driver board and top mezzanine board.
- Secure the top mezzanine board to the driver board using the screws from step 1.
Reconnecting
the Bottom Mezzanine Board
- Align pin holes 179 and 180 on the J2 and J3 connectors of the bottom mezzanine
board with pins 179 and 180 of the J5 and J6 connectors on the driver board.
Gently fold the mezzanine board over onto the driver board as shown in the
following figure. Leave approximately 6 mm of clearance between the mezzanine
board and the driver board. Do not press the boards together. Note Ensure the black surface mount J4 and J5 connectors on the mezzanine board face away from the driver board, and the notch in the corner of the mezzanine board faces the bottom front of the module.
1 Mezzanine Board J2 Connector 3 Driver Board J5 Connector 2 Mezzanine Board J3 Connector 4 Driver Board J6 Connector - Connect the PCB interconnect cable to the J2 connector on the bottom mezzanine board.
- Reconnect the daughterboard to the CMI bracket.
- Replace the spacers between the driver board and bottom mezzanine board.
- Secure the daughterboard assembly to the CMI bracket using the screws from step 2.
- Replace the ejector handle assembly screw from step 1.