The Keysight DAQM907A is a multifunction I/O module designed for the DAQ970A and DAQ973A Data Acquisition Systems. It expands mainframe capabilities with dual 8-bit digital ports, a 26-bit gated totalizer input, and two configurable analog outputs—enabling precise control and monitoring across industrial, test, and measurement applications. All digital and event inputs support continuous alarm evaluation independent of scan cycles.
Technical Specifications
Digital Input/Output
• Two 8-bit digital input ports and two 8-bit digital output ports
• Digital outputs control external devices: microwave switches, attenuators, solenoids, power relays, indicators
• Digital inputs monitor limit switches and digital bus status
• Switching voltage: 42 V
• Output current rating: 400 mA
• Simple read/write operation from front panel or bus—no handshake modes required
Totalizer Input
• Gated totalizer, 100 kHz maximum frequency
• 26-bit resolution
• Counts events from photo interrupters, limit switches, Hall-effect sensors
• Maintains continuously updated total accessible via front panel or program
• Runtime to overflow: approximately 45 minutes at full speed
• TTL-threshold triggering; counts only when both terminals enabled
• Includable in scan operations
Analog Outputs
• Two independent analog outputs
• ±12 V voltage mode or ±24 mA current mode per output
• 16-bit resolution
• Sources bias voltages, controls programmable power supplies, provides control setpoints
• Two dedicated sensing channels for real-time monitoring of sourced voltage or current
• Direct programming in volts or milliamps
Integration
• Single earth-referenced module
• Screw terminal connectivity
• Compatible with Keysight DAQ970A and DAQ973A mainframes
• Digital, totalizer, and sensing inputs integrate into system scans
• Alarm limits continuously evaluated and logged independent of scan interval
– Key Features
• Flexible digital control: 16 total I/O lines for external device switching and status monitoring
• Extended event counting: 26-bit totalizer eliminates frequent overflow in long-duration tests
• Dual-mode analog sourcing: voltage and current outputs with integrated feedback sensing
• Asynchronous alarm capture: digital and counter thresholds monitored continuously
• Expandable within DAQ system architecture for multi-module configurations
– Typical Applications
• Process control and device switching in automated test systems
• Event logging from mechanical sensors and digital transducers
• Programmable voltage/current bias sourcing for component characterization
• Industrial monitoring with continuous alarm detection and data logging
– Compatibility & Integration
The DAQM907A integrates directly into Keysight DAQ970A and DAQ973A systems, inheriting their scanning and configuration flexibility. All inputs—digital, totalizer, and analog sensing—participate in programmed scans or operate independently for alarm monitoring.
