Keysight L4421A 40-Channel Armature Multiplexer
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Keysight L4421A is a 40-channel armature multiplexer with low thermal offset, built-in thermocouple reference, and 100 channel/sec scanning rate.
Product details
| Model | L4421A |
| Manufacturer | Keysight |
| Category | Multimeters & DMMs |
| Availability | Made to order |
Description
Overview
The Keysight L4421A is a versatile, high-performance 40-channel armature multiplexer designed for general purpose scanning applications. 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 multimeter. Four additional fused inputs bring the total to 44 channels, allowing up to 1A of current to be routed to an external multimeter for AC and DC current measurements without external shunt resistors.
Key Features
- 40 2-wire latching armature relays with 4 additional fused inputs (44 channels total)
- Low thermal offset characteristics for accurate temperature measurements
- Built-in thermocouple reference junction for external multimeter use
- Scan up to 100 channels per second
- 300V, 1A switch rating; 2A carry current
- Standard 50-pin Dsub connectors for compatibility with standard cables and terminal blocks
- Relay counter for maintenance tracking
Applications
- Temperature measurement systems with external multimeters
- Data acquisition and automated scanning applications
- AC and DC current measurement systems
- Automated test equipment (ATE)
Specifications
| Channels | 40 (44 with fused inputs) |
| Relay Type | 2-wire latching armature |
| Switch Rating | 300V, 1A |
| Carry Current | 2A |
| Scan Rate | 100 channels/sec |
| Connector | 50-pin Dsub |
| Thermocouple Reference | Built-in junction on terminal block |
| Thermal Offset | Low thermal offset characteristics |
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Keysight L4421A 40-Channel Armature Multiplexer
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