Agilent/Keysight 34501A

The Agilent/Keysight 34501A is a low-frequency relay multiplexer module designed for data acquisition and signal switching applications. This 32-channel module integrates into Keysight data acquisition chassis to enable high and low switching across 2-wire configurations. Built around armature relay technology, the 34501A delivers reliable channel selection and routing for measurement systems requiring multi-point data collection and switched signal paths.

Technical Specifications

• Channel Count: 32 simultaneous channels


• Relay Type: Armature relay


• Switching Capability: High and low switching


• DC Voltage Range: 0–250 V maximum


• AC Voltage Range: 0–250 V maximum


• Configuration: 2-wire supported


• Form Factor: Proprietary module interface

Key Features

• Multi-channel relay switching with simultaneous access to 32 independent channels


• Dual high/low switching paths for flexible measurement routing


• Armature relay design for cost-effective, reliable switching performance


• Operates across voltage ranges to 250 V DC and AC


• Compact module form factor for space-constrained chassis installations

Typical Applications The 34501A addresses data acquisition systems requiring automated channel selection, multi-point sensor switching, and signal routing across moderate voltage levels. Common uses include laboratory test automation, environmental monitoring networks, and industrial data collection where manual switching overhead must be eliminated.

Compatibility & Integration The 34501A functions as a plug-in module within the Keysight 34980A Multifunction Data Acquisition Chassis and compatible data acquisition systems. Its proprietary bus interface integrates with the host chassis, allowing centralized control of all 32 switching channels through the chassis command interface. Modular architecture permits stacking of multiple relay modules for expanded channel density within a single chassis.