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 (reqs ext 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 high-performance 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. The low thermal offset characteristics and built-in thermocouple reference on the terminal block, make it ideal for temperature measurements 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 (44 channels total) 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 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. 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 connections. When configured as a multiplexer, the L4421A features break-beforemake 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. This can help you determine when to begin or end an acquisition. The L4421A also includes a relay counter to monitor and help predict when relays are nearing their end of life. Figure 1. L4421A 40-channel armature multiplexer with low thermal offset (bank 2) 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. System connections you can trust The L4421A comes with 2 heavy duty 50-pin Dsub connectors that allow for simple, reliable connection options. Each connector uses 30 micro-inches 2 of gold to ensure a repeatable, accurate measurement. Flexible 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 that allow 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. 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 browser 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 maintain your instrument from remote locations. * View and modify instrument setup Figure 2. The Web interface makes it easy to set up, troubleshoot and maintain your test remotely * Define and execute switch sequences * View error queue * 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 the Web browser without having to install any special software. Password protection and LAN lockout are also provided to limit access for additional security. * Open or close switches * Send, receive and view SCPI commands 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 and know, or use standard IVI and LabVIEWTM software drivers that provide compatibility with the most popular development environments: * Agilent T&M Toolkit for Microsoft Visual Studio(R).NET and Agilent VEE Pro * National Instruments LabVIEW, LabWindows/CVI, TestStand, and Switch Manager * Microsoft C/C++(R) and Visual Basic(R) 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 1A 2A 60 W 10 8 Volt-Hertz limit General specifications Offset voltage 2 <3 uV Initial closed channel resistance 2 < 1.5 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 Crosstalk at terminal block (ch-ch) 45 MHz 3 300 kHz 1 MHz 20 MHz 45 MHz -75 dB -75 dB -50 dB -40 dB HI-LO LO - earth 150 pF 150 pF No load 10 V, 100 mA Rated load = 100 M 10 M 100 k Capacitance at terminal block General characteristics Relay life typical Scanning speeds 5 100 ch/s Open /close time, typical 4 ms/4 ms Analog bus connection Yes 1 2 3 4 5 6 DC or AC RMS voltage, channel-to-channel or channel-to-earth At analog bus connector 50 Ohm source, 50 Ohm load, differential measurements verified with 4-port network analyzer (Sdd21) Limited to 6 W of channel resistance power loss per module Speeds are with an external DMM with 4-1/2 digits, delay 0, display off, autozero off, and within bank 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. 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 GPIB ch/s LAN (w/ VXI 11) ch/s Scanning DCV or Ohms 100 100 Scanning ACV 75 75 Scanning temperature 100 100 Source Interval, external, software Scan triggering 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 <2 ms. External trig jitter <2 ms 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 Memory General specifications Power consumption 15 VA 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 1 year 6 Product Specifications (continued) Software Agilent connectivity software included Agilent I/O Libraries Suite 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 Windows(R) 98 SE/NT/2000/XP Operating system1 Computer interfaces Standard LAN 10BaseT/100BaseTx Optional IEEE 488.2 GPIB Software driver support for programming languages IVI-C and IVI-COM for Windows NT(R)/2000/XP Software drivers LabVIEW Compatible with programming tools and environments Agilent VEE Pro T&M Toolkit (reqs Visual Studio.NET) National Instruments TestStand Measurement Studio LabWindows/CVI LabVIEW Switch Executive Microsoft Visual Studio.NET(R) C/C++ Visual Basic 6(R) 1 Load I/O Libraries Version M for Windows NT support or version 14.0 for Windows 98 SE support 7 Ordering information Related Agilent literature Other accessories Includes User's guide on CD, power cord, and Quick Start package Y1160A Rack mount kit for L4400 series instrumentsracks 2 instruments side-by-side on sliding tray Option -GPIB 34307A L4421A 40-chan armature multiplexer Adds GPIB interface Option 0B0 Deletes printed manual set, full documentation included on CD ROM Option ABA English printed manual set Data Sheets 5988-6302EN Agilent VEE Pro 5989-1441EN Agilent W1140A-TKT 10-pack of J-type thermocouples 34308A 5-pack of 10 k thermistors For additional information please visit: http://www.agilent.com/find/L4421A Connection Options Select terminal block for discrete wiring, cables or connector kits. Cables and connector kits require 2 per instrument. 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 T&M Toolkit 2.0 with Test Automation 5989-1439EN Agilent E2094N I/O Libraries Suite 14 Agilent Technologies' Test and Measurement Support, Services, and Assistance www.agilent.com Agilent Technologies aims to maximize the value you receive, while minimizing your risk and problems. We strive to ensure that you get the test and measurement capabilities you paid for and obtain the support you need. Our extensive support resources and services can help you choose the right Agilent products for your applications and apply them successfully. Every instrument and system we sell has a global warranty. 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Agilent Direct www.agilent.com/find/agilentdirect Quickly choose and use your test equipment solutions with confidence. Agilent Open www.agilent.com/find/open Agilent Open simplifies the process of connecting and programming test systems to help engineers design, validate and manufacture electronic products. Agilent offers open connectivity for a broad range of system-ready instruments, open industry software, PC-standard I/O and global support, which are combined to more easily integrate test system development. China: (tel) 800 810 0189 (fax) 800 820 2816 Europe: (tel) 31 20 547 2111 Korea: (tel) (080) 769 0800 (fax) (080) 769 0900 Latin America: (tel) (305) 269 7500 Taiwan: (tel) 0800 047 866 (fax) 0800 286 331 Other Asia Pacific Countries: (tel) (65) 6375 8100 (fax) (65) 6755 0042 Email: tm_ap@agilent.com Contacts revised: 09/26/05 Product specifications and descriptions in this document subject to change without notice. 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