Keysight / Agilent / HP 34501 32-Channel Armature Relay Multiplexer Module

The Keysight 34501A is a 32-channel armature relay multiplexer module that provides signal routing for data acquisition, automated testing, and electronic measurement systems. The module delivers low thermal offset and high isolation across its switching channels, enabling precise signal selection in complex test environments. Designed as a plug-in module, it integrates into larger mainframe-based test systems to expand switching and multiplexing capability without adding external hardware.

Technical Specifications

Channel Count: 32 channels

Relay Type: Armature relay

Thermal Offset: Low (typical performance)

Isolation: High

Switching Speed: Suitable for automated testing applications

Key Features

Low thermal offset minimizes measurement error in precision applications

High isolation between channels reduces cross-talk and signal degradation

Armature relay technology provides reliable mechanical switching

Modular design integrates into existing data acquisition mainframes

Typical Applications

Signal routing in multi-channel data acquisition systems

Channel selection in automated test equipment

Electronic measurement and characterization

Complex switching matrices requiring 32-point connectivity

Compatibility & Integration The 34501A is designed as a plug-in module for Keysight and Agilent data acquisition mainframes and chassis systems. Integration typically requires a compatible host mainframe that provides control, power, and digital interfaces for channel selection and relay operation. Modules of this class are controlled via standard digital interfaces such as GPIB or SCPI commands through the host system.