Keysight / Agilent / HP 44484A Terminal Block

The Keysight/Agilent/HP 44484A Terminal Block is a screw-terminal connection accessory designed for the 44474A Digital I/O Module. It has the physical interface between the module and discrete external wiring, enabling straightforward signal termination and system integration within Keysight mainframe platforms.

Technical Specifications The 44484A is the connection point for the 44474A Digital I/O Module, which provides 16 bi-directional data lines and 4 control/handshaking lines. All I/O lines are TTL compatible. The 16 data lines support TTL-compatible input and open collector output, with each line capable of sinking up to 0.125 A from external devices. Addressing flexibility allows the 16 I/O lines to be configured as individual bits, two independent 8-bit ports, or a single 16-bit word. Port pairs can be configured for simultaneous independent operation - one port for input while the other handles output, for example.

Key Features

Screw-type connections for secure discrete wiring

TTL-compatible signal levels across all I/O lines

0.125 A per-line current sink capability

Flexible addressing: bit-level, 8-bit, or 16-bit word access

Independent simultaneous input/output port configuration

Direct integration with 44474A Digital I/O Module

Typical Applications The 44484A terminal block is used in automated test systems requiring discrete external signal connections, including digital control, monitoring, and handshaking operations in laboratory and production environments.

Compatibility & Integration The 44484A is designed specifically for use with the 44474A Digital I/O Module and is compatible with the 3499A/B/C Mainframe family, enabling straightforward integration into existing Keysight instrument systems.