Agilent L4421A 40-Channel Armature Multiplexer Data Sheet * LXI compliance includes built-in Ethernet connectivity * Fully-featured graphical web interface * 40 2-wire latching armature relays * Thermocouple reference junction for temperature measurements (requires external DMM) * Relay counter * Scan up to 100 ch/s * 300 V, 1 A switch; 2 A carry current * Software drivers for most common programming environments 40-channel multiplexer offers highperformance signal switching wherever your application needs it The Agilent L4421A is a high-performance 40-channel armature multiplexer that is LXI Class C compliant. With its small size and Ethernet connectivity, this switch can be placed wherever your application needs it. The L4421A is a versatile multiplexer for general purpose scanning or, when using the module in a non-scanning mode, you can close as many channels as you wish. The low thermal offset characteristics and built-in thermocouple reference on the terminal block, make it ideal for temperature measurements when used with an external DMM. The dense, multi-function switching with 100 channel/ second scan rates addresses a broad spectrum of data acquisition, design verification and functional test applications. The Ethernet connection also simplifies distributed data acquisition so that you can collect data from multiple locations. Four additional fused inputs (channels 41- 44) can route up to 1 A of current to an external DMM, allowing for AC and DC current measurements without the need for external shunt resistors. Using this LXI instrument, you'll get all the benefits of an Ethernet connection, instrument web interface, standard software drivers and more. The LXI standard is supported by multiple vendors, enabling lower cost of test with accelerated test integration and development. Switch features for flexible and reliable connections Connect one of many different points to a single point or create your own custom configuration with multiple switch closures. When configured as a multiplexer, the L4421A features "break before make" connections to ensure that no two signals are connected to each other during a scan. The sequence feature defines switch sequences and controls complex signal routing to ensure the order of switch closures. 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 measurements and other events. The external trigger can be used to determine the beginning or end of data to be acquired. The L4421A also includes a relay counter to monitor and help predict when relays are nearing their end of life. Easily route signals to an external DMM The L4421A switches support signals up to 300 V and 1 A so that no external signal conditioning is required. The 34921T features a built-in thermocouple reference that allows for scanning temperature measurements with an external DMM. The analog bus connector can be used to easily route your multiplexed signals to an external DMM. Hardware handshake with an external DMM is supported through a channel closed trigger output and a channel advance trigger input. Figure 1. L4421A 40-channel armature multiplexer with low thermal offset (bank 2). System connections you can trust The L4421A comes with 2 heavy duty 50-pin Dsub connectors that allow for simple, reliable connections. 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 highspeed connections that allow for remote access and control. You can 2 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. The optional GPIB interface has many years of proven reliability and can be used for easy integration into existing applications. The L4421A ships with the Agilent E2094N I/O Libraries Suite making it easy for you to configure and integrate instruments into your system -- even if your system includes instruments from multiple vendors. 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 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 and view SCPI commands * Define and execute switch sequences * View error queue * Get status reports on relay counts, firmware revisions, and more Figure 2. The web interface makes it easy to set up, troubleshoot and maintain your test remotely. Additionally, since the web interface is built into the instrument, you can access it from any operating system that supports the web browser without having to install any 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 efficiency. You can use direct I/O with the software you already have, or use standard IVI and LabVIEW software drivers that provide compatibility with the most popular programming 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 3 High-performance switching wherever your application needs it Power button Status LEDs Easy connection options with terminal blocks, standard 50-pin cables or connector kits Optional GPIB Analog bus for connection to other devices External trigger to synchronize events 4 Built-in Ethernet Product Specifications Specifications and Characteristics Channels/configurations 40 2-wire 20 4-wire 4-current (1.5 A fused) Switch type Armature Latching Input characteristics (per channel) Max volts (DC, AC RMS) 1 300 V Max current (DC, AC RMS) Switch current Carry current Power (W, VA) 4 Volt-Hertz limit 1A 2A 60 W 8 10 Initial closed channel resistance 2,7 < 1.5 Offset voltage 2 <3 uV General specifications DC Isolation (ch-ch, ch-earth) >10 G 2,6 < 0.8 C T/C cold junction accuracy AC characteristics Bandwidth at terminal block 3 45 MHz Crosstalk at terminal block (ch-ch) 3 300 kHz 1 MHz 20 MHz 45 MHz -75 dB -75 dB -50 dB -40 dB Capacitance at terminal block HI-LO LO - earth 150 pF 150 pF Relay life typical No load 10 V, 100 mA Rated load = 100 M 10 M 100 k General characteristics Scanning speeds 5 100 ch/s Open /close time, typical 4 ms/4 ms Analog bus connection Yes 1 DC or AC RMS voltage, channel-to-channel or channel-to-earth 2 At analog bus connector 3 50 Ohm source, 50 Ohm load, differential measurements verified with 4-port network analyzer (Sdd21) 4 Limited to 6 W of channel resistance power loss per module 5 Speeds are with an external DMM with 4-1/2 digits, delay 0, display off, autozero off, and within bank 6 Includes 0.5C error temperature reference sensor and 0.3C terminal block isothermal gradient error. See User's Guide for information on supported external reference sensors. 7 Channel resistance is typically <1.5 but can go as high as 50 if a channel is used in a measurement application 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 2 K cycles prior to use may reduce the variation in channel resistance. Agilent recommends the use of 4-wire Ohms for resistance measurements. For high accuracy voltage measurements, select the DMM input resistance setting of >10 G to minimize the impact of relay contact resistance. 8 DC or Peak AC current 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. 5 Product Specifications (continued) Command Execution Time in msec: GPIB LAN Open or Close 4.7 5.3 Init/*WAI 1.9 3 Close/Init/Open 12.4 14 Scanning rates with external DMM (includes switch, DMM measure time and I/O time with Agilent 34401A, 34410A, 34411A) Scanning channels Scanning DCV or Ohms GPIB ch/s LAN (w/ VXI 11) ch/s 100 100 Scanning ACV 75 75 Scanning temperature 100 100 Scan triggering Source Interval, external, software Scan count 1 to 50,000 or continuous Scan interval 0 to 99 hours; 1 ms step size Channel delay 0 to 60 seconds per channel; 1 ms step size External trig delay < 2ms External trig jitter < 2ms States 5 instrument states with user label in non-volatile memory Power supply Universal 100 V to 240 V 10% Power line frequency 50 Hz to 60 Hz 10% automatically sensed Power consumption 15VA Operating environment Full accuracy for 0C to 55C Full accuracy to 80% R.H. at 40 C Pollution degree 1 of IEC 61010-1 Storage environment -40C to 70C 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 General system specifications 6 Product Specifications (continued) Software Agilent connectivity Agilent I/O Libraries Suite 14 or greater (E2094N) software included PC hardware Intel Pentium 100 MHz, 64 Mbyte RAM, 210 Mbyte disk space Minimum system requirements Display 800x600, 256 colors, CD-ROM drive Operating system Windows 98 SE/NT/2000/XP 1 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 Compatible with programming tools and environments Agilent VEE Pro National Instruments TestStand Measurement Studio LabWindows/CVI LabVIEW Switch Executive Microsoft Visual Studio.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 7 Ordering information Other accessories Related literature L4421A 40-chan armature multiplexer Includes User's guide on CD, power cord, and Quick Start package Y1160A Rack mount kit for L4400 series instruments racks 2 instruments side-byside on sliding tray Data sheets Option -GPIB Adds GPIB interface Option 0B0 Deletes printed manual set, full documentation included on CD ROM Note: When using the L4400 Series Rack Mount Kit, use the Y1139A solder cup connector rather than the 34921T terminal block. Option ABA English printed manual set 34307A 10-pack of J-type thermocouples Connection Options Select terminal block for discrete wiring, cables or connector kits. Cables and connector kits require 2 per instrument. 34308A 5-pack of 10 k thermistors 34921T Terminal block with temp reference for 34921A and L4421A 40-Ch Multiplexer 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 8 5988-6302EN, Agilent VEE Pro 5989-1441EN, Agilent W1140A-TKT T&M Toolkit 2.0 with Test Automation 5989-1439EN, Agilent E2094N I/O Libraries Suite 14 www.agilent.com www.agilent.com/find/L4421A myAgilent myAgilent www.agilent.com/find/myagilent A personalized view into the information most relevant to you. Agilent Channel Partners www.agilent.com/find/channelpartners Get the best of both worlds: Agilent's measurement expertise and product breadth, combined with channel partner convenience. www.lxistandard.org LAN eXtensions for Instruments puts the power of Ethernet and the Web inside your test systems. Agilent is a founding member of the LXI consortium. Three-Year Warranty www.agilent.com/find/ThreeYearWarranty Agilent's combination of product reliability and three-year warranty coverage is another way we help you achieve your business goals: increased confidence in uptime, reduced cost of ownership and greater convenience. Agilent Advantage Services www.agilent.com/find/AdvantageServices Accurate measurements throughout the life of your instruments. www.agilent.com/quality Agilent Electronic Measurement Group DEKRA Certified ISO 9001:2008 Quality Management System For more information on Agilent Technologies' products, applications or services, please contact your local Agilent office. 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(c) Agilent Technologies, Inc. 2013 Published in USA, September 24, 2013 5989-4825EN