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.