High-Density Multiconfiguration
Matrix Modules
NI PXI-2529, NI PXIe-2529, NI SCXI-1129 NEW!
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8 matrix configurations
Switch capacity
Operating Systems
Windows XP/2000/NT
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150 VDC, 150 Vrms CAT I
1 A switching/2 A carry
Recommended Software
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LabVIEW
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32,000-step scan list for
deterministic scanning
Fully software programmable
Effortless matrix expansion
Multiple-module synchronization
with hardware triggers
LabWindows™/CVI
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Measurement Studio
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for Visual C++
NI Switch Executive
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Other Compatible Software
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Visual Basic
ANSI C/C++
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Electromechanical relays
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Available in both PXI and PXI Express
versions for optimal slot placement
NI PXI-2529/PXIe-2529
Driver Software (included)
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NI-SWITCH
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128-crosspoint matrix
4x32 and 8x16 2-wire
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matrix configurations
NI SCXI-1129
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256-crosspoint matrix
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Six 2-wire matrix configurations
configurations by simply changing the terminal block. For example, you can
create an 8x32 two-wire matrix by using the NI SCXI-1335 terminal block with an
SCXI-1129 module. You can easily transform the same SCXI-1129 module into a
16x16 two-wire matrix by simply replacing the SCXI-1335 with an NI SCXI-1336
terminal block.
Overview
The NI PXI-2529, PXIe-2529, and SCXI-1129 are high-density matrix relay
modules built for applications with high-channel counts. The modules are
two-wire matrices that are configurable with front mounting terminal blocks to
achieve many different matrix configurations. Table 1 provides a complete list of
possible configurations. Expanding the matrix channel count is as easy as adding
more modules. With the SCXI-1129, you can pass analog signals between two
or more switch modules via a high-voltage backplane (HVAB), matrix expansion
cables, or matrix expansion plugs. Using these connections, you can instantly
expand your matrix without external wiring. The NI 2529 modules are designed
to work well with both low- and high- voltage levels. They use relays with low
thermal offset to ensure accurate low-voltage measurements. These relays can
switch up to 150 Vrms or 150 VDC.
The NI 2529 modules use latching relays in the matrices to ensure that the
state of each matrix remains unchanged in the event of accidental power loss.
This feature prevents instruments and units under test from switching during
potentially damaging conditions. All relays open when power returns.
Automatic Scanning
NI 2529 modules can maximize throughput in automated test applications with
the use of scanning. Scanning improves throughput by downloading a list of
up to 32,000 connections to the switch and cycling through the list using an
event (trigger) without any interruption from the host processor. You can most
efficiently implement scanning by mating an NI 2529 or SCXI-1129 with an
instrument such as the NI PXI-4070 6½-digit FlexDMM, which issues a trigger
after each measurement.
Matrix Operation
The NI 2529 modules are general-purpose,
two-wire matrices used to route differential
signals. Through software, you can control
the matrices to connect any row to any
column. One of the key advantages of
these modules is their adaptability to
your switching needs. You can configure
Safety Disconnect
The SCXI-1129 incorporates a safety interlock that disconnects the SCXI
high-voltage analog bus from the matrix if the front terminal block is removed.
This arrangement prevents potentially hazardous voltages from appearing on
exposed front panel connector pins.
the SCXI-1129 in six different matrix
Figure 1. The matrix expansion plug
simplifies expansion.
configurations and an NI 2529 in two
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