The Agilent/Keysight 34902A is a 16-channel multiplexer module that integrates with the 34970A and 34972A Data Acquisition/Switch Units to expand automated test and data logging capabilities. Built around reed relay switching technology, the module delivers scan rates up to 250 channels/second and supports both two-wire and four-wire measurement configurations on the same card. Individual channels handle switching up to 300 V, with current measurement capability via user-supplied external shunt resistors. A built-in thermocouple reference junction eliminates the need for external temperature compensation hardware. The 34902A mounts directly into compatible mainframes, providing cost-effective channel expansion without sacrificing switching speed or measurement flexibility.
Technical Specifications
• 16 channels per module
• Reed relay switching architecture
• Scan rate: Up to 250 channels/second
• Maximum switching voltage: 300 V per channel
• Wiring modes: Two-wire and four-wire (mixable on same module)
• Current measurement: Requires user-provided external shunt resistors
• Temperature measurement: Built-in thermocouple reference junction
• Module weight: Approximately 4 lbs
– Key Features
• High-speed scanning optimized for automated production test
• Mixed-mode wiring configuration enables single-module deployment across diverse signal types
• Compact form factor for space-constrained test racks
• Thermocouple reference junction simplifies temperature data acquisition workflows
– Typical Applications
• Automated component characterization and functional testing
• Multi-channel data logging and monitoring
• Temperature and voltage measurement in manufacturing environments
• Production test systems requiring high channel density and fast switching
– Compatibility & Integration
The 34902A plugs directly into Agilent/Keysight 34970A or Keysight 34972A Data Acquisition/Switch Units. Host mainframes provide connectivity via GPIB, RS-232 (34970A), LAN, and USB (34972A) interfaces.
