Page 1
Keysight Technologies
L4433A Dual/Quad 4x8
Reed Matrix
Data Sheet
– LXI compliance includes built-in
Ethernet connectivity
– Fully-featured graphical
web interface
– Dual 4x8, 8x8, or 4x16
2-wire congurations
– 64 2-wire or 128 1-wire
cross points
– High speed reed relays
– Analog bus connection
– Relay counter
– ±150 V peak, 0.5 A switch, 1.5 A
carry current
– Software drivers for most common
programming environments
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Introduction
Dual/quad 4x8 Matrix offers high performance signal switching
The Keysight L4433A is a high-speed reed relay matrix that is LXI Class C compliant.
With its small size and Ethernet connectivity, this matrix canbe placed wherever your
application needs it.
The Keysight L4433A offers a flexible connection path between your device under
test (DUT) and your test equipment, allowing different instruments to be connected to
multiple points on your DUT at the same time. This instrument can be configured as a
2-wire or a 1-wire matrix, increasing the number of cross points. Multiple matrices can
be combined through the analog buses connector to create a larger matrix.
Using this LXI instrument, you’ll get all the benefits of an Ethernet connection,
instrument web server, standard software drivers and more. The LXI standard is
supported by multiple vendors, enabling lower cost of test with accelerated test
integration and development.
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03 Keysight L4433A Dual/Quad 4x8 Reed Matrix
Matrix 2
Col 1H
C1H bypass C1L bypass
H
Row 5
Row 6
Row 7
Row 8
Figure 1. L4433A Dual/Quad 4 x 8 Real Matrix.
Switch features for exible and
reliable connections
L
H
L
H
L
H
L
Col 1L Col 2H Col 2L Col 8H
C1H
H
C1L C2H
L H L H L
C2H bypass C2L bypass
The L4433A features a full cross point
matrix that allows you to connect any
row to any column. This is a convenient way to connect multiple test
instruments to multiple points on a
DUT. With its high-speed reed relays
you will get a fast response.
Each cross point in the matrix switch
has two wires - high and low - for the
measurement. Or, if you prefer, you
can configure the L4433A as a single
wire matrix, increasing the number of
cross points to 128. The L4433A also
has in-rush resistors on each column
for added protection. Expand your
matrix using the analog bus connector
to create a larger matrix, or easily connect to an external measurement
device like a DMM.
The sequence feature defines switch
closures and controls and can be used
to easily change to different switch
setups. Simply assign a sequence,
Col 8L
C2L C8H
C8H bypass C8L bypass
give it a name and then execute it
with the custom name you created.
External trigger capabilities make it
easy for you to time and synchronize
switch closures and openings.
The L4433A also includes a relay
counter to monitor and help you determine when relays are nearing their
end of life.
Easily route signals to an
external DMM
The L4433A switches support signals
up to ±150 V and 0.5 A so that no
external signal conditioning is
required. The analog bus connector
can be used to easily route your matix
switch signals to an external device.
System connections you can trust
The L4433A comes with two heavy
duty 50-pin Dsub connectors that provide simple, reliable connection
options. Each connector uses 30 micro
C8L
Analog buses
H
L
921
H
L
922
H
L
923
H
L
924
ABus1
DMM
(MEAS)
ABus2
DMM
(SENS)
ABus3
ABus4
inches of gold to ensure repeatable
and accurate measurements. Other
connection options include:
• Detachable terminal blocks with
strain relief
• Low-cost, standard 50-pin Dsub
connector kits and cables
• Mass interconnect solutions
Ethernet connectivity enables simple
connection to the network and remote
access to measurements
The Ethernet interface offers highspeed connections for remote access
and control. You can set up a private
network to filter out unwanted LAN
traffic and speed up the I/O throughput, or take advantage of the remote
capabilities and distribute your tests
worldwide. Monitor, troubleshoot, or
debug your application remotely.
Ethernet communication also can
be used with the support of LAN
sockets connections.
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04 Keysight L4433A Dual/Quad 4x8 Reed Matrix
Figure 2. The Web interface makes it easy to set up, troubleshoot and maintain your test remotely.
The optional GPIB interface has many
• View and modify instrument setup
years of proven reliability and can be
used for easy integration into existing
applications.
The L4433A ships with the Keysight
E2094N I/O Libraries Suite, which
enables connections for Keysight and
• Open or close switches
• Send, receive or view SCPI com-
mands
• Define and execute switch
sequences
non-Keysight modular and traditional
instruments. This makes it easy for you
• View error queue
to configure and integrate instruments
into your system.
Fully featured graphical web interface
makes it easy to set up and troubleshoot your tests from anywhere in
the world
The built-in web server provides remote
access and control of the instrument via
a Java-enabled browser such as Internet
Explorer. Using the web server, you can
set up, troubleshoot, and monitor your
• Get status reports on relay counts,
firmware revisions, and more
Additionally, since the web server is built
into the instrument, you can access it
on any operating system that supports
a web browser without having to install
special software. Password protection
and LAN lockout are also provided to
limit access for additional security.
instrument from remote locations.
Software for most popular
programming environments
Full support for standard programming
environments ensures compatibility and
efficiency. You can use direct I/O with
your own software, or use standard IVI
and LabVIEW software drivers that provide compatibility with the most popular
development environments:
• Keysight VEE Pro
• National Instruments LabVIEW,
LabWindows/CVI, TestStand, and
Switch Manager
• Microsoft C/C++ and Visual Basic
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05 Keysight L4433A Dual/Quad 4x8 Reed Matrix
High-performance switching wherever your application needs it
Power button
Analog bus for
connection to
other devices
Status LEDs
External trigger to
synchronize events
Easy connection options with
terminal blocks,
standard 50-pin cables or
connector kits
Optional GPIB
Built-in Ethernet
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06 Keysight L4433A Dual/Quad 4x8 Reed Matrix
Product specications
Specifications and characteristics
Channels/configurations dual 4x8
Switch type Reed non-latching
Input characteristics (per channel)
Max volts
Max current (DC, AC RMS) Switch current
Power (W, VA)
Volt-Hertz limit 10
Initial closed channel resistance
General specifications
DC Isolation (ch-ch, ch-earth) >10 GΩ
Offset voltage
AC characteristics
Bandwidth at terminal block
Crosstalk at terminal block (ch-ch)
Capacitance at terminal block HI-LO
General characteristics
Relay life typical No load
Open / close time, typical 0.5 ms / 0.5 ms
Analog bus connection Yes
8x8, 4x16
quad 4x8, 1-wire
1
Carry current
2,6
3, 9
3
± 150 V peak 2
5
/ 0.05 A 8
0.5 A
1.5 A 5 / 0.05 A
8
10 W 7
8
< 1.5 Ω 5 / 200 Ω 8 nominal
<50 uV
< 100 uV 1-wire
4
30 MHz 5 / 4 MHz
8
2 MHz 1-wire
4
300 kHz
1 MHz
20 MHz
-65 dB
-65 dB
-40 dB
80 pF
LO – earth
75 pF
1000 M
10 V, 100 mA
Rated load
10 M
10 k
1 DC or AC RMS voltage, channel-to-channel or channel-to-earth
2 Peak voltage, channel-to-channel or channel-to-earth
3 Into analog bus connector
4 50 Ohm source, 50 Ohm load, differential measurements verified (Sdd21)
5 With input resistors bypassed. Bypassing resistors will reduce lifetime of relays. See the rated load relay life characteristics.
6 Limited to 6 W channel resistance power loss per module
7 Power restrictions allow only 20 channels to be closed at one time
8 With 100 Ohm input protection resistors
9 Channel resistance is typically < 1.5 Ω but can go as high as 50 Ω when a channel is used in measurement applications with < 10 mA load current. Increased relay channel resistance for
measurements with load currents below 10 mA can occur on cards that have been out of service or following relay inactivity for periods of greater than 1 week. Switching relays for
2K cycles prior to use may reduce the variation in channel resistance. Applies to the 34931A and 34932A. Keysight recommends the use of 4-wire Ohms for resistance measurements.
For high accuracy voltage measurements, select the DMM input resistance setting of > 10 G ohms to minimize the impact of relay contact resistance.
Measurement Accuracy For accuracy measurement specification, combine the DMM offset with the switch offset.
Bandwidth of the switch may offset the accuracy of the AC measurement.
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07 Keysight L4433A Dual/Quad 4x8 Reed Matrix
Product specications (continued)
General system specifications
Power supply Universal 100 V to 240 V ±10%
Power line frequency 50 Hz to 60 Hz ±10% automatically sensed
Power consumption 15 VA
Operating environment Full accuracy for 0°C to 55°C
Storage environment -40°C to 70°C
Dimensions (H x W x L) 40.9 x 212.3 x 379.3 mm
Weight 3.9 kg, 8.6 lbs
Safety conforms to CSA, UL/IEC/EN 61010-1
EMC conforms to IEC/EN 61326-1, CISPR 11
Warranty 3 years
Memory
States 5 instrument states with user label in non-volatile memory
Software
Keysight connectivity
software included
Minimum system requirements
PC hardware Intel Pentium 100 MHz, 64 Mbyte RAM, 210 Mbyte disk space
Operating system
Computer interfaces
Software driver support for programming languages
Software drivers IVI-C and IVI-COM for Windows NT/2000/XP, LabVIEW
Keysight VEE Pro
National Instruments TestStand, Measurement Studio, LabWindows/CVI, LabVIEW,
Microsoft C/C++, Visual Basic 6, Visual Studio. NET
Full accuracy to 80% R.H. at 40 °C
Pollution degree 1 of IEC 61010-1
1.61 x 8.36 x 14.93 in
Keysight I/O Libraries Suite version 14 or greater (E2094N)
Display 800x600, 256 colors, CD-ROM drive
1
Windows 98 SE/NT/2000/XP
Standard LAN 10BaseT/100BaseTx
Optional IEEE 488.2 GPIB
Switch Executive
1 Load I/O Libraries Version M for Windows NT support or version 14.0 for Windows 98 SE support
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08 Keysight L4433A Dual/Quad 4x8 Reed Matrix
Ordering information
L4433A Dual/quad 4x8 Reed Matrix
Includes User’s guide on CD, power
cord, and Quick Start package
Option GPIB
Adds GPIB interface
Option 0B0
Deletes printed manual set, full documentation included on CD ROM
Option ABA
English printed manual set
Connection Options
Select terminal block for discrete wiring, cables or connector kits. Cables
and connector kits require 2 per instrument.
Other accessories
Y1160A
Rack mount kit for L4400 series instruments-racks 2 instruments side-by-side
with sliding tray
Note: when using the L4400 series rack
mount kit, use the Y1139A solder cup
connector kit rather than the 34921T
terminal block.
For additional information please visit:
http://www.keysight.com/find/L4433A
Related literature
Data sheets
5988-6302EN, Keysight VEE Pro
5989-1439EN, Keysight E2094N I/O
Libraries Suite 15.5
34933T
Terminal block for 34933A and L4433A
dual 4x8 Matrix
Y1135A
1.5 m 50-pin Dsub, M/F twisted pair
with outer shield cable – 300 V
Y1136A
3 m 50-pin Dsub, M/F twisted pair
with outer shield cable – 300 V
Y1139A
Solder cup connector kit with female
50-pin Dsub
Page 9
Keysight | Keysight L4433A Dual/Quad 4x8 Reed Matrix
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a rugged, PC-based high-performance measurement and automation
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Three-Year Warranty
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Beyond product specification, changing the ownership experience.
Keysight is the only test and measurement company that offers three-year
warranty on all instruments, worldwide.
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For other unlisted countries:
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(BP-04-10-14)
This information is subject to change without notice.
© Keysight Technologies 2013-2014
Published in USA, August 3, 2013
5989-4826EN
www.keysight.com
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