Agilent/Keysight 34907A

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

• 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.