The Keysight/Agilent/HP 44708A Terminal Block is a 20-channel relay multiplexer accessory for automated test and measurement systems. It provides screw-terminal connections that interface with data acquisition modules to route voltage, resistance, thermocouple, and strain gage signals through independent switching channels. Each channel supports signal switching up to 170 VDC or 120 VAC RMS (170V peak), accepting field wiring from 18 to 26 AWG. The terminal block incorporates an isothermal connector block with integrated thermistor for thermocouple reference junction compensation, enabling accurate temperature measurements through software-corrected algorithms in compatible systems.
Technical Specifications
• Channels: 20-channel terminal module
• Signal Switching Capability: Up to 170 VDC or 120 VAC RMS (170V peak)
• Wire Gauge Compatibility: 18 to 26 AWG
• Weight: 1 lb (shipping); 3.20 lbs (tested)
• Dimensions: 15 × 12 × 9 in
– Key Features
• Isothermal connector block with mounted thermistor for thermocouple reference junction measurement
• Software-compensated temperature measurement via host system
• Screw-terminal connections for field wiring integration
• Component module architecture shared with HP 44705A
• Independent channel configuration for mixed measurement types
– Multiplexing Capabilities
• Direct multiplexing of voltage signals
• Resistance measurement routing
• Thermocouple signal conditioning and compensation
• Strain gage measurement support
– Compatibility & Integration
Designed for integration with the HP 3852A data acquisition system. Compatible with the 447xx series relay multiplexer architecture. Shares component module design with the HP 44705A, enabling modular expansion across related instruments including the HP 44705H, HP 44706A, and HP 44708H.
