The Keysight/Agilent 34939A is a 64-channel general-purpose switch module for the 34980A Multifunction Switch/Measure Unit mainframe. It delivers high-density signal routing and relay switching in automated test, data acquisition, and complex measurement systems. The module features 64 Form A SPST relays with armature-latching design, each rated for 1 A switching current and 2 A carry current, handling up to 60 W per channel at ±100 VAC. Integrated relay cycle counting tracks component wear, while an on-board temperature sensor monitors thermal conditions. Simultaneous multi-channel switching capability enables efficient operation in demanding test environments. The module connects via standard 78-pin D-sub connectors and supports optional screw terminal blocks for discrete wiring. It integrates directly into the 34980A mainframe, which accommodates up to eight switch/measure modules for customized system configurations.
Technical Specifications
• Channels: 64 Form A SPST (Normally Open)
• Switch Current Rating: 1 A per channel
• Carry Current Rating: 2 A per channel
• Maximum Power: 60 W per channel
• Maximum Voltage: ±100 VAC
• Relay Type: Armature Latching
• Bandwidth: 10 MHz
• Thermal Offset: <3 µV
• Simultaneous Switching: Supported
– Key Features
• Relay cycle counter for maintenance planning and asset tracking
• Integrated temperature sensor with overheating detection
• 78-pin D-sub connectors for flexible cabling options
• Optional 34939T screw terminal block for point-to-point wiring
• Armature-latching relay design for contact reliability
– Typical Applications
• Automated test equipment (ATE) signal routing
• Multi-channel data acquisition systems
• Production test switching matrices
• Component characterization and validation
• Complex measurement system configuration
– Compatibility & Integration
The 34939A is engineered for the Keysight/Agilent 34980A mainframe. The 34980A provides eight slots supporting up to 21 total plug-in modules, enabling modular, scalable test system design.
