NI AMUX-64T Analog Multiplexer

The NI AMUX-64T is an analog multiplexer that expands the input channel capacity of National Instruments MIO and E Series data acquisition devices. It routes and manages signals in automated test and measurement systems using 16 separate 4-to-1 multiplexer circuits, configurable as 64 single-ended or 32 differential analog inputs. An integrated temperature sensor supports thermocouple cold-junction compensation, while open component positions allow insertion of custom signal conditioning such as filters, attenuators, or current measurement circuits.

– Technical Specifications

• Input Channels: 64 single-ended or 32 differential
• Multiplexer Configuration: 16 × 4-to-1 circuits
• Cascadability: Up to four units (256 total discrete inputs; 124 differential or 248 single-ended with thermocouple cold-junction compensation)
• Internal Temperature Sensor: Integrated circuit sensor; jumper-selectable to connect as differential input across two channels
• Overvoltage Protection: ±35 V powered on; ±20 V powered off
• Power: External +5 V supply or direct from MIO board
• Physical Dimensions: 10.6 × 4.9 inches
• Mounting: 19-inch rack or worktable

– Key Features

• Open component positions for custom signal processing (filters, attenuators, current measurement, grounding)
• Low-cost cold-junction compensation via integrated temperature sensor
• Cascading support for expanded input capacity
• Power LED indicator
• Compatible cable lengths: 0.2, 0.5, 1.0, or 2.0 m
• 50-pin breakout connector for unused I/O access and cascading

– Typical Applications

• Multi-channel analog signal acquisition and routing
• Thermocouple measurement systems with cold-junction compensation
• Automated test environments requiring channel expansion
• Custom signal conditioning implementations

– Compatibility & Integration

Interface with all National Instruments MIO boards and E Series devices (60xxE). Not compatible with AT-MIO-64. Program via NI-DAQ, LabVIEW, LabWindows, or register-level methods.