The Keysight 44428A is a 16-channel actuator output module purpose-built for the Keysight 3497A Data Acquisition System. It provides 16 Form C (SPDT) mercury-wetted relays capable of operating in actuator mode for power switching or digital output mode for parallel logic control. Each channel independently handles up to 1 A at 100 V peak, making it suitable for fixture actuation and external device control in automated test environments.
Technical Specifications
• Relay Type: Form C (SPDT) mercury-wetted relays
• Channel Count: 16 independent channels
• Maximum Switching Voltage: 100 V (peak) per channel
• Maximum Switching Current: 1 A per channel
• Output Format (Digital Mode): 16-bit parallel digital output
• Module Composition: Main relay board with connector block
– Key Features
• Dual-mode operation: actuator mode for active power switching; digital output mode for static logic levels
• Individually controllable relay channels enable selective actuation of test equipment and fixtures
• Mercury-wetted relay contacts provide reliable switching across the full voltage and current range
• 16-bit parallel output interface supports synchronized multi-channel control
– Typical Applications
Automated test system power distribution, test fixture relay switching, external device actuation, parallel digital control in data acquisition workflows, and multi-channel switching matrices in bench and production environments.
– Compatibility & Integration
The 44428A integrates directly with the Keysight 3497A Data Acquisition System. Expanded digital I/O capability is available through pairing with the 16 Channel Isolated Digital Input/Interrupt Assembly (Option 050).
