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L4421A 40-Channel Armature Multiplexer

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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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L4421A 40-Channel Armature Multiplexer

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Armature Multiplexer Offers High-Performance Signal Switching Wherever You Need