Agilent/Keysight 34924A

The Keysight 34924A is a 70-channel reed relay multiplexer module engineered for high-speed signal routing within the 34980A Multifunction Switch/Measure Unit mainframe. This plug-in module delivers scanning performance up to 500 channels per second, making it ideal for automated test, data logging, and high-throughput measurement applications. The module organizes its channels into two independent banks of 35 non-latching reed switches each, with eight additional armature Analog Bus relays for flexible signal distribution to system buses.

Technical Specifications

• Channel Count: 70 channels (2-wire configuration)


• Switching Type: Reed relays with relay counter for life prediction


• Maximum Switching Speed: 500 channels/second


• Maximum Switching Voltage: ±150 V peak


• Maximum Switching Current: 0.5 A


• Carry Current: 1.5 A


• Bandwidth: 25 MHz


• Thermal Offset Voltage: < 50 µV


• Input Protection: 100 ohm current-limiting resistors

Key Features

• Non-latching reed relay architecture ensures signal isolation and minimal cross-talk


• Dual-bank configuration supports independent or parallel switching operations


• Eight armature Analog Bus relays enable direct connection to system measurement buses


• Integrated relay counter provides predictive maintenance capability


• 78-pin D-sub connectors standardize physical integration with mass interconnect solutions


• Low thermal offset voltage (< 50 µV) supports precision analog measurement

Typical Applications Automated test systems requiring high-channel-count signal routing; data acquisition and continuous monitoring tasks; two-wire and four-wire resistance measurement setups; high-throughput production test environments where scan speed and channel density directly impact throughput.

Compatibility & Integration Designed exclusively as a plug-in module for the Keysight 34980A mainframe. Supports SCPI command control and programming interfaces including Agilent VEE Pro, National Instruments TestStand, LabWindows/CVI, and LabVIEW. Optional terminal block adapters (34924T) and D-sub cabling accessories are available for field customization.