The Keysight/Agilent/HP 44484A Terminal Block is a screw-terminal connection accessory designed for the 44474A Digital I/O Module. It provides 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 serves as 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.
