Agilent/Keysight 44705H

The Agilent/Keysight 44705H is a 20-channel analog signal multiplexer module that routes and switches analog signals for measurement by compatible voltmeter instruments. Built around a component module with high-voltage relays and a dedicated 20-channel terminal module, it enables rapid signal selection and measurement in automated test environments. The 44705H handles voltages up to 200 V DC and 250 V AC RMS (354 V peak), with channel scanning speeds reaching 250 channels/second when paired with HP 3852A voltmeters.

Technical Specifications

• Input Channels: 20


• DC Voltage Rating: Up to 200 V DC


• AC Voltage Rating: Up to 250 V AC RMS (354 V peak)


• Scanning Speed: Up to 250 channels/second (with HP 3852A voltmeters)


• Module Configuration: Component module with high-voltage relays; 20-channel terminal module for field wiring

Key Features

• High-voltage relay architecture for reliable signal switching at elevated potentials


• Integrated terminal module eliminates external wiring complexity


• Fast channel selection enables efficient multi-point measurement sequences


• Direct field wiring interface simplifies source connection

Typical Applications

• Automated test systems requiring multi-channel analog signal measurement


• Data acquisition systems with distributed sensor inputs


• Production test environments demanding repeatable switching performance


• High-voltage circuit monitoring and validation

Compatibility & Integration The 44705H integrates with HP 3852A voltmeter accessories and external voltmeters via standard signal routing. System control is supported through Agilent/Keysight IO Libraries Suite, which provides VISA, SICL, and VISA-COM libraries for programmatic instrument control alongside Connection Expert for configuration and IO Monitor for diagnostics.