Yokogawa 720220 16-Channel Voltage Input Module

The Yokogawa 720220 is a 16-channel voltage input module delivering isolated, high-resolution DC voltage measurements across independent channels. Built for precision data acquisition in industrial and laboratory environments, this module operates at up to 200 kS/s on a single channel or 10 kS/s across all 16 channels simultaneously, with 16-bit A/D conversion and ±0.3% DC accuracy. The 720220 integrates directly into Yokogawa ScopeCorder and data acquisition systems, supporting channel expansion up to 128 channels in larger chassis configurations.

– Technical Specifications

• Channels: 16 independent input channels
• Measurement Type: DC Voltage
• Input Coupling: DC, GND (selectable per sub-channel)
• Maximum Sample Rate: 200 kS/s (single channel); 10 kS/s (all 16 channels active)
• Input Type: Isolated unbalanced
• Frequency Range: DC to 5 kHz (−3 dB)
• Voltage-Axis Sensitivity: 200 mV/div (1-2-5 steps)
• Maximum Input Voltage: 42 V DC+AC peak (direct input, 1 kHz or less)
• Maximum Common Mode Voltage: 42 V DC+AC peak (direct input); 30 Vrms (CAT I/II)
• Input Impedance: 1 MΩ ±1%
• Vertical Axis Accuracy: ±(0.3% of 10 div) DC
• A/D Resolution: 16-bit (2400 LSB/div)
• Common Mode Rejection Ratio: ≥86 dB @ 50/60 Hz (typical)
• Bandwidth Limit: OFF/500 Hz (selectable per sub-channel)
• Temperature Coefficient: Zero ±(0.015% of 10 div)/°C; Gain ±(0.01% of 10 div)/°C (typical)
• Input Connector: Removable spring-type terminal blocks (8-channel sections)

– Key Features

• Ground-to-terminal isolation; non-isolated channel-to-channel configuration
• High channel density with flexible coupling and bandwidth filtering
• 16-bit conversion with tight gain and zero-point temperature stability

– Compatibility & Integration

The 720220 operates with Yokogawa DL350, DL850, and DL950 Series ScopeCorder systems, as well as SL1000 and SL2000 Data Acquisition Systems. Up to eight modules support expansion to 128 total channels in DL950 or SL2000 installations. When operating in multi-module DL850 configurations, data multiplexing may produce repeated samples; isolating the 720220 to a dedicated file prevents this artifact.