L4437A-GSA - KEYSIGHT TECHNOLOGIES

Agilent L4437A

32-Channel Form A/Form C

General Purpose Switch

Data Sheet

• LXI compliance includes built-in

Ethernet connectivity

• Fully-featured graphical web inter-

face

• 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

General purpose switch offers high-

power signal switching

The Agilent L4437A is a general

purpose switch that is LXI Class C com-

pliant. 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 external

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 benefits of an Ethernet connec-

tion, 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.

Figure 1. L4437A 32-Ch General Purpose Switch.

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 chan-

nels can be closed at the same time.

Additionally, for switching reactive

loads, the optional terminal blocks have

pads for snubbing circuits.

The sequence feature defines 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.

The L4437A also includes a relay coun-

ter to monitor and help predict when

relays are nearing their end of life.

System connections you can trust

The L4437A comes with 2 heavy duty

50-pin 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 con-

nector 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 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.

Matrix 2

Row 5

Col 1H

921

922

923

924

C1H

C1H bypass C1L bypass

C1L C2H

C2H bypass C2L bypass

C2L C8H

C8H bypass C8L bypass

C8L

L H L H L

Col 1L Col 2H Col 2L Col 8H

Analog buses

ABus1

DMM

(MEAS)

ABus2

DMM

(SENS)

ABus3

ABus4

Col 8L

Row 6

Row 7

Row 8

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 Agilent

E2094N I/O Libraries Suite, which

enables connections for Agilent and

non-Agilent modular and traditional

instruments. This makes it easy for you

to configure and integrate instruments

into your system.

Fully-featured graphical web interface

makes it easy to set up and trouble-

shoot 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 Explorer. Using the

web interface, you can set up, trouble-

shoot, and monitor your instrument

from remote locations.

• View and modify instrument setup

• Open or close switches

• Send, receive or view SCPI com-

mands

• Define and execute switch

sequences

• View error queue

• Get status reports on relay counts,

firmware revisions, and more

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 program-

ming environments

Full support for standard programming

environments ensures compatibility

and efficiency. You can use direct I/O

with your own software, or use stan-

dard IVI and LabVIEW software drivers

that provide compatibility with the most

popular development environments:

• Agilent T&M Toolkit for Microsoft

Visual Studio.NET and Agilent VEE

Pro

• National Instruments LabVIEW,

LabWindows/CVI, TestStand, and

Switch Manager

• Microsoft C/C++ and Visual Basic

High-performance switching wherever your application needs it

Power button

Status LEDs

External trigger to

synchronize events

Optional GPIB Built-in Ethernet

Easy connection options

with terminal blocks,

standard 50-pin cables or

connector kits

Product specifications

Specifications and characteristics

Channels/configurations 28 form C

4 form A

Switch type Armature latching

Input characteristics (per channel)

Max volts (DC, AC RMS) 1Form C, 300 V

Form A, 30 VDC/250 VAC

Max current (DC, AC RMS) Form C, 1 A switch (2 A carry)

Form A, 5 A switch (8 A carry)

Power (W, VA) 2Form C, 60 W

Form A, 150 W

Volt-Hertz limit 108

General specifications

Offset voltage < 3 uV

Initial closed channel resistance Form C, 125 mΩ

Form A, 50 mΩ

DC isolation (ch-ch, ch-earth) >10 GΩ

AC characteristics

Bandwidth at terminal block 310 MHz

Crosstalk at terminal block (ch-ch) 3100 kHz

1 MHz

10 MHz

55 dB

35 dB

15 dB

Capacitance at terminal block Ch-Ch

Ch-earth

Form C, 12 pF/Form A 10 pF75 pF

Form C, 21 pF/Form A 19 pF

General characteristics

Relay life typical Form C, 100 M/100 k

Form A, 50 M/30 k

Open / close time, typical Form C, 4 ms/4 ms

Form A, 10 ms/10 ms

Initial/reset relay state Form C, maintains state

Form A, user configurable

Analog bus connection No

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 veriﬁed (S21)

Product specifications (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

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

Agilent connectivity

software included

Agilent I/O Libraries Suite version 14 or greater (E2094N)

Minimum system requirements

PC hardware Intel Pentium 100 MHz, 64 Mbyte RAM, 210 Mbyte disk space

Display 800x600, 256 colors, CD-ROM drive

Operating system 1Windows 98 SE/NT/2000/XP

Computer interfaces

Standard LAN 10BaseT/100BaseTx

Optional IEEE 488.2 GPIB

Software driver support for programming languages

Software drivers IVI-C and IVI-COM for Windows NT/2000/XP, LabVIEW

Agilent VEE Pro, T&M Toolkit (requires Visual Studio. NET)

National Instruments TestStandMeasurement Studio, LabWindows/CVI, LabVIEW,

Switch Executive

Microsoft VisualStudio.NET, C/C++, Visual Basic 6

1 Load I/O Libraries Version M for Windows NT support or version 14.0 for Windows 98 SE support

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 docu-

mentation included on CD ROM

Option ABA

English printed manual set

Connection Options

Select terminal block for discrete wir-

ing, cables or connector kits. Cables

and connector kits require 2 per instru-

ment.

34937T

Terminal block for

34937A and L4437A General Purpose

Switch

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

Other accessories

Y1160A

Rack mount kit for L4400 series instru-

ments-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.agilent.com/find/L4437A

Related literature

Data sheets

5988-6302EN, Agilent VEE Pro

5989-1441EN, Agilent W1130B T&M

Toolkit 2.1 with Test Automation

5989-1439EN, Agilent E2094N I/O

Libraries Suite 15.5

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Product specifications and descriptions in

this document subject to change without

notice.

Published in USA, September 24, 2013

5989-4827EN

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