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    • L4421A 40-Channel Armature Multiplexer [Discontinued]

    L4421A 40-Channel Armature Multiplexer

    Product Status:
    Discontinued / Currently Supported
    Discontinued / Currently Supported
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    Highlights

    Armature Multiplexer Offers High-Performance Signal Switching Wherever You Need

    The Keysight L4421A is a versatile 40-channel armature multiplexer that is LXI Class C compliant. Its small size, fast scan rates, and Ethernet connectivity make this switch ideal for general-purpose scanning, design verification, and functional test applications.

    • Up to 40-channel 2-wire latching armature relay
    • Counter monitors and predicts when relays are nearing end-of-life
    • Thermocouple reference junction is ideal for temperature measurements (requires external digital multimeter)
    • LXI standard is supported by multiple vendors, enabling lower cost of test and accelerated test integration
    • Four additional fused inputs route current to an external multimeter, allowing current measurements without external shunt resistors
    • Five instrument states with user label in non-volatile memory

    Note: Keysight will discontinue the L4421A 40-Channel Armature Multiplexer on June 1st, 2023. The last day to place an order for this product is May 31st, 2023. The closest replacement product for L4421A is a combination of 34980A Multifunction Switch / Measure Unit with 34921A 40-Channel Armature Multiplexer. The programming command of L4421A is compatible with 34921A. Keysight will continue to support these products for the standard period of 5 years.

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