The Keysight 34907A is a multifunction module that expands the 34970A and 34972A Data Acquisition/Switch Units with integrated digital I/O, analog output, and event counting capabilities. This earth-referenced module delivers precise signal control and monitoring for automated test systems, enabling engineers and system integrators to implement sense and control functions across a single platform.
Technical Specifications
Digital Input/Output
• Two 8-bit ports for digital input and output
• 400 mA sink capability with 42 V open collector outputs
• Digital inputs monitor limit switches and digital bus status
• Digital outputs control microwave switches, attenuators, solenoids, power relays, and indicators via external power supply
• Alarm limits continuously evaluated between scans
• Front panel or bus-initiated reads and writes
Totalizer Input
• Single channel, 100 kHz gated totalizer
• 26-bit resolution for event counting
• 1 Vpp sensitivity
• Continuous alarm evaluation across scan intervals
• Counts events from photo interrupters, limit switches, and Hall-effect sensors
• Runtime capacity of approximately 45 minutes at full speed before overflow
• Real-time total access via front panel or programmatic interface
Analog Output
• Two channels, ±12 V output range
• 16-bit resolution
• Non-isolated
• Direct voltage programming from front panel or bus
– Key Features
• Scanned or standalone operation for digital inputs and totalizer
• Continuous alarm monitoring for digital and event counter inputs
• Screw-terminal on-module connections
• BenchVue software control and analysis support
– Typical Applications
• External device status sensing and control
• Bias voltage sourcing to devices under test
• Analog programmable power supply control
• Control system setpoint management
• High-speed event counting with minimal overflow risk
– Compatibility & Integration
Designed exclusively for the Keysight 34970A and 34972A Data Acquisition/Switch Units.
