SWB-2810 Overview

SWB-2810 Pinout

Type A


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Table 1. Signal Descriptions
Signal Description
ABx Analog bus row connection
Cx Column connection
GND Safety interlock ground connection
INTRLK Safety interlock resistor connection
— No connection

Type B


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Table 2. Signal Descriptions
Signal Description
Cx Column connection
GND Safety interlock ground connection
INTRLK Safety interlock resistor connection
— No connection

SWB-2810 Topology

The following table lists possible topologies.

Note You must connect pin 96 (INTERLOCK ENABLE) to pin 48 (GND) with a 500 Ω resistor (500 Ω ±20%, 1/10 W minimum) to allow connection to the analog bus. Refer to the NI SwitchBlock Safety Interlock topic for additional information about this safety feature.
Number of Cards Topology
1 1-Wire 4×43 Matrix
2 1-Wire 4×86 Matrix
3 1-Wire 4×129 Matrix
4 1-Wire 4×172 Matrix
5 1-Wire 4×215 Matrix
6 1-Wire 4×258 Matrix

1-Wire 4×43 Matrix

Module software name: Configured Topology (NISWITCH_TOPOLOGY_CONFIGURED_TOPOLOGY)

Hardware Diagram


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Making a Connection

The immediate operation, the niSwitch Connect Channels VI or the niSwitch_Connect function with parameters card1r2 and c1 result in the following connection:

  • signal connected to CARD1R2 is routed to C1

Relay Names

Refer to the following list for relay names of one module.

  • kCARD1AB0
  • kCARD1AB1
  • kCARD1AB2
  • kCARD1AB3
  • kCARD1R0C0...kCARD1R0C42
  • kCARD1R1C0...kCARD1R1C42
  • kCARD1R2C0...kCARD1R2C42
  • kCARD1R3C0...kCARD1R3C42

SWB-2810 Relay Replacement

The module uses reed relays.

Note The module uses a custom lead length to meet safety standards. Trim leads per rework instructions or use one of the custom relays from the relay kit.
Relay Relay Manufacturer Part Number
Matrix Meder MS05-BV50980
Safety (Reference Designators K17 and K58) Tyco Electronics 5-1462039-8
Relay Kit Part Number
National Instruments (10 matrix relays) 781450-10
National Instruments (10 safety relays) 781089-10

Complete the following sets of steps to locate and replace a failed relay.

Locate the 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.
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The relay names in the following table correspond to a single-card device.

Relay Name Reference Designator Relay Name Reference Designator Relay Name Reference Designator Relay Name Reference Designator
kcard1ab0 K16 kcard1r0c40 K170 kcard1r1c41 K179 kcard1r2c42 K175
kcard1ab1 K25 kcard1r0c41 K180 kcard1r1c42 K176 kcard1r3c0 K1
kcard1ab2 K57 kcard1r0c42 K177 kcard1r2c0 K2 kcard1r3c1 K5
kcard1ab3 K66 kcard1r1c0 K3 kcard1r2c1 K6 kcard1r3c2 K9
kcard1r0c0 K4 kcard1r1c1 K7 kcard1r2c2 K10 kcard1r3c3 K13
kcard1r0c1 K8 kcard1r1c2 K11 kcard1r2c3 K14 kcard1r3c4 K18
kcard1r0c2 K12 kcard1r1c3 K15 kcard1r2c4 K19 kcard1r3c5 K22
kcard1r0c3 K24 kcard1r1c4 K20 kcard1r2c5 K23 kcard1r3c6 K26
kcard1r0c4 K21 kcard1r1c5 K32 kcard1r2c6 K27 kcard1r3c7 K30
kcard1r0c5 K33 kcard1r1c6 K28 kcard1r2c7 K31 kcard1r3c8 K34
kcard1r0c6 K29 kcard1r1c7 K40 kcard1r2c8 K35 kcard1r3c9 K38
kcard1r0c7 K41 kcard1r1c8 K36 kcard1r2c9 K39 kcard1r3c10 K42
kcard1r0c8 K37 kcard1r1c9 K48 kcard1r2c10 K43 kcard1r3c11 K46
kcard1r0c9 K49 kcard1r1c10 K44 kcard1r2c11 K47 kcard1r3c12 K50
kcard1r0c10 K45 kcard1r1c11 K55 kcard1r2c12 K51 kcard1r3c13 K54
kcard1r0c11 K56 kcard1r1c12 K52 kcard1r2c13 K63 kcard1r3c14 K59
kcard1r0c12 K53 kcard1r1c13 K64 kcard1r2c14 K60 kcard1r3c15 K67
kcard1r0c13 K65 kcard1r1c14 K61 kcard1r2c15 K68 kcard1r3c16 K71
kcard1r0c14 K62 kcard1r1c15 K69 kcard1r2c16 K72 kcard1r3c17 K75
kcard1r0c15 K70 kcard1r1c16 K73 kcard1r2c17 K76 kcard1r3c18 K79
kcard1r0c16 K82 kcard1r1c17 K77 kcard1r2c18 K80 kcard1r3c19 K84
kcard1r0c17 K78 kcard1r1c18 K81 kcard1r2c19 K85 kcard1r3c20 K88
kcard1r0c18 K74 kcard1r1c19 K86 kcard1r2c20 K89 kcard1r3c21 K92
kcard1r0c19 K87 kcard1r1c20 K90 kcard1r2c21 K93 kcard1r3c22 K96
kcard1r0c20 K91 kcard1r1c21 K94 kcard1r2c22 K97 kcard1r3c23 K100
kcard1r0c21 K95 kcard1r1c22 K98 kcard1r2c23 K101 kcard1r3c24 K104
kcard1r0c22 K99 kcard1r1c23 K102 kcard1r2c24 K105 kcard1r3c25 K108
kcard1r0c23 K103 kcard1r1c24 K106 kcard1r2c25 K109 kcard1r3c26 K112
kcard1r0c24 K107 kcard1r1c25 K110 kcard1r2c26 K113 kcard1r3c27 K117
kcard1r0c25 K111 kcard1r1c26 K114 kcard1r2c27 K118 kcard1r3c28 K121
kcard1r0c26 K115 kcard1r1c27 K119 kcard1r2c28 K122 kcard1r3c29 K125
kcard1r0c27 K120 kcard1r1c28 K123 kcard1r2c29 K126 kcard1r3c30 K129
kcard1r0c28 K124 kcard1r1c29 K127 kcard1r2c30 K130 kcard1r3c31 K132
kcard1r0c29 K128 kcard1r1c30 K131 kcard1r2c31 K133 kcard1r3c32 K136
kcard1r0c30 K138 kcard1r1c31 K134 kcard1r2c32 K137 kcard1r3c33 K139
kcard1r0c31 K135 kcard1r1c32 K144 kcard1r2c33 K140 kcard1r3c34 K143
kcard1r0c32 K145 kcard1r1c33 K141 kcard1r2c34 K150 kcard1r3c35 K146
kcard1r0c33 K142 kcard1r1c34 K151 kcard1r2c35 K147 kcard1r3c36 K153
kcard1r0c34 K152 kcard1r1c35 K148 kcard1r2c36 K154 kcard1r3c37 K157
kcard1r0c35 K149 kcard1r1c36 K155 kcard1r2c37 K158 kcard1r3c38 K160
kcard1r0c36 K156 kcard1r1c37 K159 kcard1r2c38 K161 kcard1r3c39 K164
kcard1r0c37 K166 kcard1r1c38 K162 kcard1r2c39 K165 kcard1r3c40 K167
kcard1r0c38 K163 kcard1r1c39 K172 kcard1r2c40 K168 kcard1r3c41 K171
kcard1r0c39 K173 kcard1r1c40 K169 kcard1r2c41 K178 kcard1r3c42 K174

Replace the Relay

The module uses lead-free assemblies.

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 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
  • Solder wick
  • Fine pick
  • Isopropyl alcohol
  • Cotton swabs

Replace the relay as you would any other through-hole part. Trim the replaced relay leads to no more than 0.5 mm (0.02 inch) from the PCB.

Note You can use the Switch Soft Front Panel to reset the relay count after you have replaced a failed relay.