PXIe-2575 Overview

PXIe-2575 Hardware Diagram


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Table 1. Channel Pairings and Relay Assignments
1-Wire 196×1 Channel Name 2-Wire 95×1 Channel Name 2-Wire 98×1 Channel Name Relay Number
CH0 CH95 CH0 CH0 K97
CH1 CH96 CH1 CH1 K93
CH2 CH97 CH2 CH2 K89
CH3 CH98 CH3 CH3 K85
CH4 CH99 CH4 CH4 K81
CH5 CH100 CH5 CH5 K77
CH6 CH101 CH6 CH6 K73
CH7 CH102 CH7 CH7 K69
CH8 CH103 CH8 CH8 K65
CH9 CH104 CH9 CH9 K61
CH10 CH105 CH10 CH10 K57
CH11 CH106 CH11 CH11 K53
CH12 CH107 CH12 CH12 K47
CH13 CH108 CH13 CH13 K44
CH14 CH109 CH14 CH14 K40
CH15 CH110 CH15 CH15 K39
CH16 CH111 CH16 CH16 K32
CH17 CH112 CH17 CH17 K28
CH18 CH113 CH18 CH18 K24
CH19 CH114 CH19 CH19 K20
CH20 CH115 CH20 CH20 K16
CH21 CH116 CH21 CH21 K11
CH22 CH117 CH22 CH22 K7
CH23 CH118 CH23 CH23 K3
CH24 CH119 CH24 CH24 K52
CH25 CH120 CH25 CH25 K56
CH26 CH121 CH26 CH26 K60
CH27 CH122 CH27 CH27 K64
CH28 CH123 CH28 CH28 K68
CH29 CH124 CH29 CH29 K72
CH30 CH125 CH30 CH30 K76
CH31 CH126 CH31 CH31 K80
CH32 CH127 CH32 CH32 K84
CH33 CH128 CH33 CH33 K87
CH34 CH129 CH34 CH34 K91
CH35 CH130 CH35 CH35 K95
CH36 CH131 CH36 CH36 K2
CH37 CH132 CH37 CH37 K6
CH38 CH133 CH38 CH38 K10
CH39 CH134 CH39 CH39 K14
CH40 CH135 CH40 CH40 K19
CH41 CH136 CH41 CH41 K23
CH42 CH137 CH42 CH42 K27
CH43 CH138 CH43 CH43 K31
CH44 CH139 CH44 CH44 K35
CH45 CH140 CH45 CH45 K38
CH46 CH141 CH46 CH46 K43
CH47 CH142 CH47 CH47 K46
CH48 CH143 CH48 CH48 K96
CH49 CH144 CH49 CH49 K92
CH50 CH145 CH50 CH50 K88
CH51 CH146 CH51 CH51 K83
CH52 CH147 CH52 CH52 K79
CH53 CH148 CH53 CH53 K75
CH54 CH149 CH54 CH54 K71
CH55 CH150 CH55 CH55 K67
CH56 CH151 CH56 CH56 K63
CH57 CH152 CH57 CH57 K59
CH58 CH153 CH58 CH58 K55
CH59 CH154 CH59 CH59 K51
CH60 CH155 CH60 CH60 K45
CH61 CH156 CH61 CH61 K42
CH62 CH157 CH62 CH62 K37
CH63 CH158 CH63 CH63 K34
CH64 CH159 CH64 CH64 K30
CH65 CH160 CH65 CH65 K26
CH66 CH161 CH66 CH66 K22
CH67 CH162 CH67 CH67 K18
CH68 CH163 CH68 CH68 K13
CH69 CH164 CH69 CH69 K9
CH70 CH165 CH70 CH70 K5
CH71 CH166 CH71 CH71 K1
CH72 CH167 CH72 CH72 K50
CH73 CH168 CH73 CH73 K54
CH74 CH169 CH74 CH74 K58
CH75 CH170 CH75 CH75 K62
CH76 CH171 CH76 CH76 K66
CH77 CH172 CH77 CH77 K70
CH78 CH173 CH78 CH78 K74
CH79 CH174 CH79 CH79 K78
CH80 CH175 CH80 CH80 K82
CH81 CH176 CH81 CH81 K86
CH82 CH177 CH82 CH82 K90
CH83 CH178 CH83 CH83 K94
CH84 CH179 CH84 CH84 K0
CH85 CH180 CH85 CH85 K4
CH86 CH181 CH86 CH86 K8
CH87 CH182 CH87 CH87 K12
CH88 CH183 CH88 CH88 K17
CH89 CH184 CH89 CH89 K21
CH90 CH185 CH90 CH90 K25
CH91 CH186 CH91 CH91 K29
CH92 CH187 CH92 CH92 K33
CH93 CH188 CH93 CH93 K36
CH94 CH189 CH94 CH94 K41
CH190 CH193 — CH95 K48
CH191 CH194 — CH96 K49
CH192 CH195 — CH97 K98
COM Relay K15

PXIe-2575 Pinout

1-Wire 196x1 Multiplexer Topology


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Table 2. Signal Descriptions
Signal Description
CHx Signal connection
COM Routing destination for all channels
— No connection

2-Wire 95×1 Multiplexer Topology


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Table 3. Signal Descriptions
Signal Description
CHx+ Positive signal connection
CHx- Negative signal connection
COM+ Routing destination for all positive channels
COM- Routing destination for all negative channels
— No connection

2-Wire 98×1 Multiplexer Topology


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Table 4. Signal Descriptions
Signal Description
CHx+ Positive signal connection
CHx- Negative signal connection
COM+ Routing destination for all positive channels
COM- Routing destination for all negative channels
— No connection

PXIe-2575 Topology

Each topology supports immediate and scanning operations.

1-Wire 196×1 Multiplexer

Software name: 2575/1-Wire 196x1 Mux (NISWITCH_TOPOLOGY_2575_1_WIRE_196X1_MUX)


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2-Wire 95×1 Multiplexer

Software name: 2575/2-Wire 95x1 Mux (NISWITCH_TOPOLOGY_2575_2_WIRE_95X1_MUX)


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2-Wire 98×1 Multiplexer

Software name: 2575/2-Wire 98x1 Mux (NISWITCH_TOPOLOGY_2575_2_WIRE_98X1_MUX)


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Making a Connection

You can control the channels using the niSwitch Connect Channels VI or the niSwitch_Connect function.

For example, to close the relay of channel 1, call niSwitch_Connect(vi, "ch1", "com"). To open the relay of channel 1, call niSwitch_Disconnect(vi, "ch1", "com").

When scanning the module, a typical scan list entry could be ch1->com;. This entry closes the relay between CH1 and COM.

PXIe-2575 Relay Replacement

The module uses electromechanical armature relays.

Replacement Relay Part Number
OMRON G6KU-2F-Y
Tyco 5-1462039-7
National Instruments (10 relays, OMRON) 780386-01
National Instruments (10 relays, Tyco) 782051-01

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. Refer to the following figures and table for relay locations.
    Figure 1. Base Board 191700C and Earlier

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    Figure 2. Base Board 151664A and Later

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    Figure 3. Mezzanine Board

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    1-Wire 196×1 Channel Name2-Wire 95×1 Channel Name2-Wire 98×1 Channel NameRelay Name
    CH0CH95CH0CH0K97
    CH1CH96CH1CH1K93
    CH2CH97CH2CH2K89
    CH3CH98CH3CH3K85
    CH4CH99CH4CH4K81
    CH5CH100CH5CH5K77
    CH6CH101CH6CH6K73
    CH7CH102CH7CH7K69
    CH8CH103CH8CH8K65
    CH9CH104CH9CH9K61
    CH10CH105CH10CH10K57
    CH11CH106CH11CH11K53
    CH12CH107CH12CH12K47
    CH13CH108CH13CH13K44
    CH14CH109CH14CH14K40
    CH15CH110CH15CH15K39
    CH16CH111CH16CH16K32
    CH17CH112CH17CH17K28
    CH18CH113CH18CH18K24
    CH19CH114CH19CH19K20
    CH20CH115CH20CH20K16
    CH21CH116CH21CH21K11
    CH22CH117CH22CH22K7
    CH23CH118CH23CH23K3
    CH24CH119CH24CH24K52
    CH25CH120CH25CH25K56
    CH26CH121CH26CH26K60
    CH27CH122CH27CH27K64
    CH28CH123CH28CH28K68
    CH29CH124CH29CH29K72
    CH30CH125CH30CH30K76
    CH31CH126CH31CH31K80
    CH32CH127CH32CH32K84
    CH33CH128CH33CH33K87
    CH34CH129CH34CH34K91
    CH35CH130CH35CH35K95
    CH36CH131CH36CH36K2
    CH37CH132CH37CH37K6
    CH38CH133CH38CH38K10
    CH39CH134CH39CH39K14
    CH40CH135CH40CH40K19
    CH41CH136CH41CH41K23
    CH42CH137CH42CH42K27
    CH43CH138CH43CH43K31
    CH44CH139CH44CH44K35
    CH45CH140CH45CH45K38
    CH46CH141CH46CH46K43
    CH47CH142CH47CH47K46
    CH48CH143CH48CH48K96
    CH49CH144CH49CH49K92
    CH50CH145CH50CH50K88
    CH51CH146CH51CH51K83
    CH52CH147CH52CH52K79
    CH53CH148CH53CH53K75
    CH54CH149CH54CH54K71
    CH55CH150CH55CH55K67
    CH56CH151CH56CH56K63
    CH57CH152CH57CH57K59
    CH58CH153CH58CH58K55
    CH59CH154CH59CH59K51
    CH60CH155CH60CH60K45
    CH61CH156CH61CH61K42
    CH62CH157CH62CH62K37
    CH63CH158CH63CH63K34
    CH64CH159CH64CH64K30
    CH65CH160CH65CH65K26
    CH66CH161CH66CH66K22
    CH67CH162CH67CH67K18
    CH68CH163CH68CH68K13
    CH69CH164CH69CH69K9
    CH70CH165CH70CH70K5
    CH71CH166CH71CH71K1
    CH72CH167CH72CH72K50
    CH73CH168CH73CH73K54
    CH74CH169CH74CH74K58
    CH75CH170CH75CH75K62
    CH76CH170CH76CH76K66
    CH77CH172CH77CH77K70
    CH78CH173CH78CH78K74
    CH79CH174CH79CH79K78
    CH80CH175CH80CH80K82
    CH81CH176CH81CH81K86
    CH82CH177CH82CH82K90
    CH83CH178CH83CH83K94
    CH84CH179CH84CH84K0
    CH85CH180CH85CH85K4
    CH86CH181CH86CH86K8
    CH87CH182CH87CH87K12
    CH88CH183CH88CH88K17
    CH89CH184CH89CH89K21
    CH90CH185CH90CH90K25
    CH91CH186CH91CH91K29
    CH92CH187CH92CH92K33
    CH93CH188CH93CH93K36
    CH94CH189CH94CH94K41
    CH190CH193—CH95K48
    CH191CH194—CH96K49
    CH192CH195—CH97K98
    COM RelayK15
  3. Remove the parts that secure the mezzanine board to the base board.
    • Disassembly of Base Board 191700C and Earlier: remove the four screws and washers that secure the mezzanine board to the base board. Do not remove the hex standoffs or the base board. .
      Note Older versions might have adhesive plastic lead covers that you must remove. The module retains full specifications even if these covers are not reinstalled.

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      1 Screws4 Hex Standoff
      2 Washers5 Base board
      3 Lead covers (if present)
    • Disassembly of Base Board 151664A and Later: remove the four screws that secure the mezzanine board to the base board. Do not remove the hex standoffs.

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      1 Screws4 Base board
      2 Mezzanine board5 Screws
      3 Hex Standoff
  4. Separate the mezzanine board from the base board.
  5. 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

Ensure you have the following:

  • Temperature-regulated soldering iron
    • Set to 371 °C (700 °F) for lead-free solder rework
    • Set to 316 °C (600 °F) for lead solder rework
  • Solder
    • 96.5/3.0/0.5 Tin/Silver/Copper solder (flux core) for lead-free solder rework
    • 63/37 Tin/Lead solder (flux core) for lead solder rework
  • Solder wick
  • Fine pick
  • Isopropyl alcohol
  • Cotton swabs
Note NI recommends using lead-free solder for relay replacement on lead-free assemblies, and lead solder for relay replacement on lead assemblies.
Notice Do not rework lead assemblies using a lead-free work station. Lead solder from the unit could contaminate the station.
Notice If a lead-free assembly is reworked with lead solder, label the assembly to indicate this. This can prevent the same unit from being reworked later on a lead-free solder station, which could contaminate the station.

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.
    Notice Using excessive force on a soldered pad can result in lifting the PCB trace and ruining the board.
  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.
    Notice 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 Use the NI-SWITCH 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.