The Keysight/Agilent/HP 34903A is a 20-channel actuator and general-purpose switch module for the 34970A and 34972A Data Acquisition/Switch Unit mainframes. It provides automated control of external power relays, solenoids, indicator lights, and power cycling for products under test through 20 independent SPDT Form C latching relays. Each relay offers flexible signal routing with access to Normally-Open, Normally-Closed, and Common contacts via screw terminals. The module integrates with matrix and multiplexer modules to build custom switching systems tailored to specific test requirements.
Technical Specifications
• Channels: 20 independent SPDT (Form C) latching relays
• Maximum Switching Voltage: 300 V
• Maximum Switching Current: 1 A
• Maximum Switched Power: 50 W
• Bandwidth: 10 MHz
• Switching Speed: Up to 120 channels per second (up to 250 channels/sec to internal memory)
• Contact Configuration: SPDT (Form C) latching relays
• Termination: Screw terminals for each switch contact
• Internal DMM Connection: Not supported
– Key Features
• Form C latching relay architecture enables flexible control with simultaneous multi-channel closure capability
• 10 MHz bandwidth supports high-frequency switching applications
• Modular design fits directly into 34970A/34972A mainframe slots
• Alarm-triggered control allows scanning module conditions to automate actuator operations
• Rated for 300 V / 1 A / 50 W maximum switching capacity
– Typical Applications
• External power relay and solenoid actuation
• Product power cycling in automated test sequences
• Indicator and status light control
• Customized multi-module switching system construction
• Alarm-based automated test flow control
– Compatibility & Integration
The 34903A installs into Keysight 34970A or 34972A mainframes and combines with compatible matrix and multiplexer modules including the 34901A, 34904A, 34905A, 34906A, 34907A, and 34908A for extended switching capability.
