Agilent/Keysight 34925A

The Keysight 34925A is a 40/80 channel optically isolated FET multiplexer module that expands the signal routing capabilities of the 34980A Multifunction Switch/Measure Unit. This solid-state switching solution delivers high-density channel density with scanning speeds up to 1000 channels per second, making it ideal for high-volume automated test and data acquisition systems requiring precision signal routing and long-life switching performance.

– Technical Specifications

• Channel Configuration: 40 channels (2-wire) or 80 channels (1-wire); mixed 2-wire and 4-wire configurations supported
• Switching Technology: Optically isolated Field-Effect Transistor (FET) switches with solid-state relays
• Peak Switching Voltage: ±80 V
• Switch Current Ratings: 20 mA, 50 mA
• Scanning Speed: Up to 1000 channels/second
• Module Topology: 1:N configuration (one channel closed per bank)
• Maximum Combined Channels: Up to 560 2-wire channels or 640 1-wire channels (multiple modules on single 34980A mainframe)
• Connector Type: Standard 50-pin D-Sub
• Terminal Block Options: 34925T-001 (2-wire), 34925T-002 (1-wire); supports 20 AWG (≤100 connections) and 24 AWG (>100 connections) wire

– Key Features

• Optically isolated FET switches provide superior signal integrity with exceptionally low leakage current
• Solid-state relays deliver reliable long-life operation without mechanical wear
• Supports mixed 2-wire and 4-wire configurations on the same module
• Multiple modules can be cascaded via the 34980A’s analog buses
• Standard 50-pin D-Sub connectors with optional terminal block solutions

– Typical Applications

Automated test systems, high-volume manufacturing test floors, precision data acquisition, multipoint signal routing in production environments.

– Compatibility & Integration

Designed exclusively for the Keysight 34980A mainframe. Software control via Keysight BenchVue DAQ Control and Analysis app or BenchLink Data Logger (up to 900 ch/sec data logging).