Keysight / Agilent / HP 34922T Terminal Block

The 34922T is a detachable terminal block accessory that provides discrete wiring connections to the 34922A 70-channel armature multiplexer module. It serves as a configurable interface for external signal routing in automated test and measurement systems integrated with the Keysight 34980A mainframe. The terminal block incorporates a safety interlock feature that shorts pins 39 and 59 on Bank 2, enabling the Bank 2 Analog Bus relays to close while preventing inadvertent high-voltage routing to the module’s D-sub connector when exposed.

## Technical Specifications

• **Compatibility:** Keysight 34922A 70-channel armature multiplexer module; Keysight 34980A mainframe
• **Wire Gauge Support:** Up to 20 AWG for fewer than 100 connections; 24 AWG for 100 or more connections
• **Configuration Options:** Solder connectors (34922T-001); screw connectors (34922T-002)
• **Solder Connector Specifications:** 20 AWG maximum, 22 AWG typical
• **Design:** Detachable terminal block with model number and abbreviated module name labeling; provisions for slot number identification

## Key Features

• Safety interlock protection shorts Bank 2 interlock pins to enable Analog Bus relay closure
• Prevents high-voltage routing to D-sub connector when module is unshielded
• All modules connected to the internal DMM receive interlock protection
• Analog Bus relays remain open and disconnected when terminal block or cable is absent
• Two connector types accommodate diverse wiring methodologies

## Typical Applications

• Discrete wiring connections in automated switching and measurement systems
• Signal routing in multi-channel multiplexing applications
• External circuit integration with DMM-connected measurement modules

## Compatibility & Integration

The 34922T integrates directly with the 34922A multiplexer module within the 34980A mainframe architecture. Proper connection of protective earth terminals is required before operation. Supply voltage must remain within specification with fluctuations not exceeding 10 percent of nominal. EU and UK Declarations of Conformity are available.