The Keysight 34938T is a detachable terminal block accessory designed for discrete wiring applications with the 34938A 20-Channel 5 Amp Form A Switch module. It provides screw-type connections to external circuits and sensors within data acquisition systems built around the 34980A Mainframe. The terminal block supports wire sizes up to 20 AWG for standard applications and 24 AWG for systems exceeding 100 connections. Each block includes pads for user-supplied snubber circuitry—resistors, capacitors, varistors, or equivalent components—to suppress reactive transients during switching operations.
Technical Specifications
• Wire Size Support: Up to 20 AWG (fewer than 100 connections); up to 24 AWG (more than 100 connections)
• Connection Type: Screw-type terminals
• Modularity: Detachable design
• Snubber Provisions: Pads for user-supplied snubber elements (resistors, capacitors, varistors)
• Weight: Approximately 0.56 kg
• Maximum Current Rating: 5 Amp per channel (inherited from 34938A module)
– Key Features
• Labeled with model number, abbreviated module name, and slot number designation space
• Accepts hazardous voltages exceeding 30 Vrms, 42.4 Vpeak, and 60 Vdc per IEC 61010-1
• Requires terminal block covers during operation for personnel safety
• Screw connections demand adequate mechanical torque to ensure reliable contact
– Typical Applications
Laboratory test automation, sensor multiplexing, relay switching control, and multi-channel data logging where external discrete wiring to test fixtures or signal sources is required.
– Compatibility & Integration
Designed exclusively for the Keysight 34938A 20-Channel 5 Amp Form A Switch module within the 34980A Mainframe ecosystem. Installation requires qualified personnel familiar with IEC 61010-1 safety practices. Only 5 mm of conductor insulation should be stripped; all wire strands must fully seat within the connector housing. The mainframe power supply does not de-energize external circuits connected to the analog bus or terminal blocks.
