Keysight 34959A – Breadboard Module for 34980A

The 34959A Breadboard Module provides a 137mm x 190mm x 23mm (5.4” x 7.5” x 0.9”) space inside the 34980A Multifunction Switch/Measure Unit, for you to install custom circuitry to support applications not available on the standard plug-in modules.

This module minimizes the need for customer-supplied circuitry by providing +5V and +12V power supplies for logic and relay drive use, 16 general purpose digital I/O bit lines with control lines, and 32 relay drive lines. Your custom circuitry can access the 34980A mainframe’s internal DMM and four Analog Buses. Desired measurement and I/O functions can be programmed using standard read/write commands.

Internally, most of the customer-provided circuitry connects to the module through two ribbon cables; the Analog Bus connections are made by hard-soldering to a grid of holes provided on the Keysight-supplied PC board. Two external ports are provided for Dsub connectors (DB50 or DB78) between the module and your field wiring.

The sheet metal base of the module provides fifteen countersunk holes for flexible mounting of circuit boards, terminal blocks or other components. As with all other plug-in modules for the 34980A, cooling is provided within the mainframe chassis.

The chart below outlines several main features of system control modules for the Keysight 34980A.