The NI TB-4304 is a front-mounting terminal block that interfaces with National Instruments PXIe-4304 and PXIe-4305 analog input modules. It provides 32 screw-terminal connections for direct sensor and instrumentation wiring into PXIe-based data acquisition systems. The terminal block features a 96-pin female DIN input connector and an 82-pin female screw terminal output, with a spring mechanical interlock and top-mounted securing screw for stable attachment to the host module.
Technical Specifications
• Analog Input Channels: 32
• Analog Input Voltage Range: −42 V to +42 V
• Analog Input Resolution: 24 bits (with compatible PXIe-4304/4305 modules)
• Maximum Wire Gauge: 1.5 mm² (16 AWG)
• Terminal Screw Torque: 0.2 to 0.25 N·m (1.77 to 2.21 lb·in.)
• Operating Temperature: 0 °C to 55 °C ambient
• Weight: Approximately 1 lb.
• Input Connector: 96-pin female DIN
• Output Connector: 82-pin female screw terminal
– Key Features
• Keyed connectors prevent incompatible device connections and reduce installation errors
• Strain relief bar integrated into terminal block design
• PFI lines support synchronization signal routing (receive or transmit)
• Digital ground (DGND) access available for grounding applications
• Spring mechanism with top-mounted securing screw ensures mechanical stability
• Maximum cable length 30 m (100 ft.) for shielded, twisted-pair configurations
– Typical Applications
• Measurement Category I sensor acquisition and signal conditioning
• Multi-channel analog input measurement systems
• Automated test and instrumentation setups requiring direct terminal connectivity
– Compatibility & Integration
The TB-4304 attaches directly to NI PXIe-4304 and PXIe-4305 modules via spring interlock mechanism. Driver support is available in NI-DAQmx 15.1.1 and later versions. Keyed connectors ensure proper alignment and prevent accidental cross-connection with incompatible modules or accessories. Installation requires fully inserted stripped wire ends with no exposed conductor beyond the terminal screw interface.
