Agilent / Keysight 34931A Dual 4×8 Armature Matrix for 34980A

The Keysight 34931A is a dual 4×8 armature matrix module that plugs into the 34980A Multifunction Switch/Measure Unit to deliver flexible signal routing and switching in automated test systems. Each matrix provides 32 crosspoints for a total of 64 2-wire crosspoints, enabling efficient connection of multiple test points to various instruments. The module uses latching armature relays rated for ±300 V and 1 A per channel, with a 2 A carry current capability. Relay counters track usage to support predictive maintenance planning.

The 34931A integrates with the 34980A’s four 2-wire analog buses, allowing expansion to larger configurations. Up to eight matrix modules can be housed in a single mainframe to achieve 512 2-wire crosspoints. The module can be reconfigured as an 8×8 or 4×16 matrix by connecting columns or rows. Standard 50-pin D-sub connectors support external connections via cables, terminal blocks, or mass interconnect solutions. A hardware Safety Interlock automatically opens Analog Bus relays when interlock continuity is interrupted, protecting downstream equipment.

– Technical Specifications

• Matrix Configuration: Dual 4×8 (32 crosspoints per matrix; 64 total)
• Alternative Configurations: 8×8 or 4×16 matrix via column/row connection
• Maximum Switching Voltage: ±300 V per channel
• Maximum Switching Current: 1 A per channel
• Maximum Carry Current: 2 A per channel
• Relay Type: Latching armature relays with usage counter
• Analog Buses: Four 2-wire buses for inter-module expansion
• Connectors: 50-pin D-sub for external device connection
• Safety Feature: Hardware Safety Interlock on Analog Bus relays

– Key Features

• Scalable architecture supports up to 512 crosspoints in a single 34980A mainframe
• Latching relay design reduces power consumption and heat generation
• Relay counter enables maintenance scheduling based on actual operating cycles
• Flexible reconfiguration for diverse test topologies without hardware changes
• Direct integration with 34980A internal DMM for measurement capability

– Typical Applications

• Multi-point signal switching in automated production test
• Device characterization requiring flexible matrix routing
• Laboratory measurement systems with variable test configurations
• Enterprise test environments demanding expandable switching infrastructure

– Compatibility & Integration

Designed exclusively for the Keysight 34980A Multifunction Switch/Measure Unit mainframe. Connects to the 34980A’s analog buses and internal DMM, enabling modular expansion of switching capacity across all eight available slots.