Agilent/Keysight 34925T

The Keysight 34925T is a detachable terminal block accessory for the 34925A 40/80-channel FET multiplexer module, enabling discrete wiring connections in data acquisition systems. Available in two configurations - 34925T-001 for 2-wire setups and 34925T-002 for 1-wire setups

It has screw-type connection terminals sized to accommodate 20 AWG wire for up to 100 connections or 24 AWG wire for more than 100 connections. Rated for ±80 Vpk, the 34925T-001 integrates directly with the Keysight 34980A Multifunction Data Acquisition Mainframe, which supports up to eight plug-in modules.

Technical Specifications

• Connection Type: Screw-type discrete wiring


• Wire Size Support: Up to 20 AWG (≤100 connections); up to 24 AWG (>100 connections)


• Voltage Rating (34925T-001): ±80 Vpk


• Form Factor: Detachable terminal block


• Module Compatibility: Keysight 34925A FET Multiplexer (40 or 80 channels)


• Mainframe Compatibility: Keysight 34980A (supports up to 8 plug-in modules)


• Operating Mode: Module operates in 1:N configuration with one channel closed per bank


• Overvoltage Protection: Integrated in 34925A module

Key Features

• Two configuration options (2-wire and 1-wire) match diverse measurement topologies


• Flexible wire gauge selection optimizes connection density and current capacity


• Screw terminals ensure reliable, repeatable connections without solder joints


• Detachable design simplifies module swaps and field reconfiguration


• Overvoltage circuitry in paired 34925A module provides transient protection

Typical Applications

• Multiplexed analog signal acquisition requiring discrete external wiring


• Industrial data logging with modular signal conditioning


• Environmental monitoring systems using 1:N channel switching


• Flexible test benches requiring quick terminal block replacement

Compatibility & Integration The 34925T is designed exclusively for use with the Keysight 34925A multiplexer module within the 34980A mainframe ecosystem. Terminal block selection must match the configured mode of the paired 34925A module. Environmental suitability spans Class A electromagnetic environments, Pollution Degrees 1 and 2, and Installation Category II installations.