Yokogawa 720221 16-CH Temperature/Voltage Input Module

The Yokogawa 720221 is a 16-channel input module for simultaneous acquisition of temperature and voltage signals in industrial process monitoring and control applications. Designed to operate with the Yokogawa 701953 scanner box, this module integrates into DL350 and DL850 series data acquisition systems to deliver precise, isolated measurements across multiple input types and ranges.

– Technical Specifications

• Input Channels: 16 channels
• Input Types: Temperature (thermocouples) and voltage
• Supported Thermocouple Types: K, E, J, T, L, U, N, R, S, B, W, Au-Fe-chromel
• Voltage Measurement Ranges: 1 mV/div to 2 V/div
• Resolution: 16-bit voltage (24000 LSB/range); 0.1°C temperature
• Sampling Rate: Up to 10 S/s
• Bandwidth (typical -3 dB point): 600 Hz at 100 ms data update rate; 140 dB or greater at 3 s update rate (50/60 Hz)
• Noise Reduction: 100 dB or greater (50/60 Hz) typical
• Reference Junction Compensation Accuracy: K, E, J, T, L, U, N types ±1°C; R, S, B, W types ±1.5°C

– Key Features

• Oversampling-based digital filtering reduces noise and enhances measurement stability
• Voltage-to-temperature signal conversion capability
• Input isolation between ground, terminal blocks, and subchannels
• Screw-terminal connections on external scanner box for thermocouple and voltage wiring
• Operates in conjunction with Yokogawa 701953 scanner box (required)

– Typical Applications

• Multi-point temperature monitoring in thermal processes
• Simultaneous voltage and temperature data acquisition
• Industrial process control and validation
• Equipment diagnostics requiring mixed-signal input

– Compatibility & Integration

The 720221 module is compatible with Yokogawa DL350 and DL850 series data acquisition systems. Operation requires the Yokogawa 701953 scanner box for signal conditioning and terminal connectivity.