Agilent / Keysight 34952A Multifunction Module with 32-bit DIO, 2-ch D/A and Totalizer for 34980A

The Keysight 34952A Multifunction Module expands the 34980A Multifunction Switch/Measure Unit with integrated digital I/O, analog output, and event counting in a single slot. This module delivers 32-bit configurable digital control, dual-channel ±12 V analog outputs, and a 32-bit totalizer with 100 kHz counting capability - enabling rapid test automation without external signal conditioning.

Technical Specifications

• Four 8-bit ports, configurable as 8, 16, or 32-bit operations


• TTL-compatible inputs and outputs with 400 mA sink current per output


• Input thresholds: V_in(L) 2.0 V


• Output levels: V_out(L) 2.4 V @ 1 mA


• Supports external open-drain pull-up to 42 V maximum


• Internal 5 V pull-up resistors on input-configured ports


• Pattern match or state-change alarm detection with 4 ms sampling interval


• Read/write speed: 95 operations per second


• Typical alarm latency to 34980A output: 5 ms Digital-to-Analog Converter


• Two independent analog output channels


• Output range: ±12 V


• 16-bit resolution


• 10 mA maximum output current per channel


• Direct voltage programming via SCPI commands Totalizer


• 32-bit resolution


• Maximum count rate: 100 kHz


• Rising-edge or falling-edge trigger selection


• Dual gate control: TTL high enables on Gate terminal; TTL low enables on Not-Gate terminal


• Read-only or read-with-reset operation modes


• Continuous counting when gate terminals unpopulated

Key Features

• Single-slot installation in 34980A mainframe


• 50-pin D-sub connectors for direct cable, terminal block, or mass interconnect attachment


• Maskable alarm functions with fast state detection


• Front-panel readability for single 8-bit input port at a time


• Compatible with optional 34952T terminal block accessory

Typical Applications

• Automated test systems requiring mixed-signal control and measurement


• Event counting and gating in production test environments


• Multi-channel analog signal generation synchronized with digital sequencing


• TTL logic interface and monitoring for digital device characterization

Compatibility & Integration Designed exclusively for the Keysight 34980A mainframe. Connects via standard 50-pin D-sub connectors. Integrates with the 34980A's modular architecture for flexible measurement and switching configurations.