Page 1
Keysight Technologies L4437A
32-Channel Form A/Form C
General Purpose Switch
Data Sheet
– LXI compliance includes built-in
Ethernet connectivity
– Fully-featured graphical
web interface
– 28 Form C channels up to 1 A,
60 W
– 4 Form A channels up to 5 A,
150 W
– Armature latching relays
– Relay counter
– Temperature sensor for
overheating
conditions
– Simultaneous channel switching
– Software drivers for most common
programming environments
Page 2
Introduction
General purpose switch offers high-power signal switching
The Keysight Technologies L4437A is a general purpose switch that is LXI Class C compliant. With its
small size and Ethernet connectivity, this switch can be placed wherever your application needs it.
The L4437A has 32 general purpose switches that can be used to cycle power to products under test,
control status lights, and to actuate ex ternal power relays and solenoids.
28 channels are Form C switches for basic switching needs. Four additional Form A channels are
offered for high-power switching needs.
Using this LXI instrument, you’ll get all the benets 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.
Page 3
03 | Keysight | L4437A 32-Channel Form A/Form C General Purpose Switch - Data Sheet
Versatile switching for your
high-power switching needs
The L4437A general purpose switch can
be used to route signals or to control other
system devices. This switch is ideal for
device actuation and switching loads or
power supplies.
The L4437A switch has 28 independent
single-pole, double-throw (SPDT) 1 A relays and 4 single-pole, single-throw (Form
A) 5 A relays. The 28 Form C channels
have 300V, 1 A contacts and can handle
up to 60 W. The form A channels are 30
VDC/250 VAC, 5 A contacts and can handle up to 150W, enough for many power
line-switching applications.
These switches are made of latching armature relays where multiple channels can
be closed at the same time. Additionally,
for switching reactive loads, the optional
terminal blocks have pads for snubbing
circuits.
The sequence feature denes switch
closures and controls and can be used to
easily change between different switch
setups. Assign a sequence, 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.
System connections you can
trust
The L4437A comes with 2 heavy duty 50pin Dsub connectors that allow for simple,
reliable connection options. Each connector uses 30 micro-inches of gold to ensure
a repeatable, accurate measurement.
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 high-speed
connections, enabling remote access and
control. You can set up a private net-
work to lter out unwanted L AN trafc
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.
Figure 1. L4437A 32-Ch General Purpose Switch.
The L4437A also includes a relay counter
to monitor and help predict when relays
are nearing their end of life.
Page 4
04 | Keysight | L4437A 32-Channel Form A/Form C General Purpose Switch - Data Sheet
Figure 2. The Web interface makes it easy to set up, troubleshoot and monitor your test remotely.
The optional GPIB interface has many
years of proven reliability and can be
used for easy integration into existing
applications.
The L4437A ships with the Keysight
E2094N I/O Libraries Suite, which enables
connections for Keysight and non-Keysight
modular and traditional instruments. This
makes it easy for you to congure and
integrate instruments into your system.
Explorer. Using the web interface, you can
set up, troubleshoot, and monitor your
instrument from remote locations.
– View and modify instrument setup
– Open or close switches
– Send, receive or view SCPI com-
mands
– Dene and execute switch sequences
– View error queue
– Get status reports on relay counts,
rmware revisions, and more
Fully-featured graphical web
interface makes it easy to set up
and troubleshoot your tests from
anywhere in the world
The built-in web interface provides remote
access and control of the instrument via
a Java-enabled browser such as Internet
Additionally, since the web interface 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.
Software for most popular
programming environments
Full support for standard programming
environments ensures compatibility
and efciency. You can use direct I/O
with your own software, or use standard IVI and LabVIEW sof tware 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
Page 5
05 | Keysight | L4437A 32-Channel Form A/Form C General Purpose Switch - Data Sheet
High-performance switching wherever your application needs it
Power button
Status LEDs
External trigger to
synchronize events
Optional GPIB
Easy connection options
with terminal blocks,
standard 50-pin cables or
connector kits
Built-in Ethernet
Page 6
06 | Keysight | L4437A 32-Channel Form A/Form C General Purpose Switch - Data Sheet
Product specications
Specications and characteristics
Channels/congurations 28 form C
Switch type Armature latching
Input characteristics (per channel)
1
3
General specications
AC characteristics
General characteristics
Max volts (DC, AC RMS)
Max current (DC, AC RMS) Form C, 1 A switch (2 A carry)
Power (W, VA)
2
Volt-Hertz limit
Offset voltage < 3 uV
Initial closed channel resistance Form C, 125 mΩ
DC isolation (ch-ch, ch-earth) >10 GΩ
Bandwidth at terminal block
Crosstalk at terminal block (ch-ch)
Capacitance at terminal block Ch-Ch
Relay life typical Form C, 100 M/100 k
Open / close time, typical Form C, 4 ms/4 ms
Initial/reset relay state Form C, maintains state
Analog bus connection No
4 form A
Form C, 300 V
Form A, 30 VDC/250 VAC
Form A, 5 A switch (8 A carry)
Form C, 60 W
Form A, 150 W
108
Form A, 50 mΩ
10 MHz
3
100 kHz
1 MHz
10 MHz
Ch-earth
55 dB
35 dB
15 dB
Form C, 12 pF/Form A 10 pF75 pF
Form C, 21 pF/Form A 19 pF
Form A, 50 M/30 k
Form A, 10 ms/10 ms
Form A, user congurable
1. DC or AC RMS voltage, channel-to-channel or channel-to-earth
2. Limited to 6 W of channel resistance power loss
3. 50 Ohm source, 50 Ohm load, differential measurements veried (S21)
Page 7
07 | Keysight | L4437A 32-Channel Form A/Form C General Purpose Switch - Data Sheet
Product specications (continued)
General system specications
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
Full accuracy to 80% R.H. at 40 °C
Pollution degree 1 of IEC 61010-1
Storage environment -40°C to 70°C
Dimensions (H x W x L) 40.9 x 212.3 x 379.3 mm
1.61 x 8.36 x 14.93 in
Weight 3.8 kg, 8.4 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 TestStandMeasurement Studio, LabWindows/CVI, LabVIEW, Switch Executive
Microsoft VisualStudio.NET, C/C++, Visual Basic 6
1
Keysight I/O Libraries Suite version 14 or greater (E2094N)
Display 800x600, 256 colors, CD-ROM drive
Windows 98 SE/NT/2000/XP
Standard LAN 10BaseT/100BaseTx
Optional IEEE 488.2 GPIB
1. Load I/O Libraries Version M for Windows NT suppor t or version 14.0 for Windows 98 SE support
Page 8
08 | Keysight | L4437A 32-Channel Form A/Form C General Purpose Switch - Data Sheet
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.
34937T
Terminal block for
34937A and L4437A General Purpose
Switch
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/nd/L4437A
Related literature
Related literature
Data sheets
5988-6302EN, Keysight VEE Pro
5989-1439EN, Keysight E2094N I/O
Libraries Suite 15.5
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 50pin Dsub
Page 9
09 | Keysight | L4437A 32-Channel Form A/Form C General Purpose Switch - Data Sheet
myKeysight
www.keysight.com/find/mykeysight
A personalized view into the information most relevant to you.
www.axiestandard.org
AdvancedTCA® Extensions for Instrumentation and Test (AXIe) is an
open standard that extends the AdvancedTCA for general purpose and
semiconductor test. Keysight is a founding member of the AXIe consortium.
ATCA®, AdvancedTCA®, and the ATCA logo are registered US trademarks of
the PCI Industrial Computer Manufacturers Group.
www.lxistandard.org
LAN eXtensions for Instruments puts the power of Ethernet and the
Web inside your test systems. Keysight is a founding member of the LXI
consortium.
www.pxisa.org
PCI eXtensions for Instrumentation (PXI) modular instrumentation delivers a
rugged, PC-based high-performance measurement and automation system.
Three-Year Warranty
www.keysight.com/find/ThreeYearWarranty
Keysight’s commitment to superior product quality and lower total cost
of ownership. The only test and measurement company with three-year
warranty standard on all instruments, worldwide.
www.keysight.com/go/quality
Keysight Technologies, Inc.
DEKRA Certified ISO 9001:2008
Quality Management System
Keysight Channel Partners
www.keysight.com/find/channelpartners
Get the best of both worlds: Keysight’s measurement expertise and product
breadth, combined with channel partner convenience.
www.keysight.com/find/L4437A
For more information on Keysight
Technologies’ products, applications or
services, please contact your local Keysight
office. The complete list is available at:
www.keysight.com/find/contactus
Americas
Canada (877) 894 4414
Brazil 55 11 3351 7010
Mexico 001 800 254 2440
United States (800) 829 4444
Asia Pacic
Australia 1 800 629 485
China 800 810 0189
Hong Kong 800 938 693
India 1 800 112 929
Japan 0120 (421) 345
Korea 080 769 0800
Malaysia 1 800 888 848
Singapore 1 800 375 8100
Taiwan 0800 047 866
Other AP Countries (65) 6375 8100
Europe & Middle East
Austria 0800 001122
Belgium 0800 58580
Finland 0800 523252
France 0805 980333
Germany 0800 6270999
Ireland 1800 832700
Israel 1 809 343051
Italy 800 599100
Luxembourg +32 800 58580
Netherlands 0800 0233200
Russia 8800 5009286
Spain 800 000154
Sweden 0200 882255
Switzerland 0800 805353
Opt. 1 (DE)
Opt. 2 (FR)
Opt. 3 (IT)
United Kingdom 0800 0260637
For other unlisted countries:
www.keysight.com/find/contactus
(BP-09-23-14)
This information is subject to change without notice.
© Keysight Technologies, 2013-2014
Published in USA, December 2, 2014
5989-4827EN
www.keysight.com
Loading...