Yokogawa Launches New Isolation and Power Modules for Precision Measurement

Expanding Accuracy in Industrial Automation

Yokogawa Test & Measurement has introduced two advanced modules—the 720252 isolation module and the 720301 power measurement module. These solutions enhance waveform accuracy and DC offset handling, supporting critical applications in industrial automation, PLC, DCS, and factory automation systems.

720252 Isolation Module: High‑Resolution Voltage and Current Analysis

The 720252 module improves upon the earlier 701251 model by offering a wider DC offset adjustment range. Engineers can now detect micro‑voltage fluctuations down to 1 mV per division, even when DC bias is present. Moreover, its high‑impedance input mode (>1 GΩ) reduces loading effects on low‑resistance battery cells, making it ideal for EV battery testing, sensor evaluation, and energy storage research.

720301 Power Measurement Module: All‑in‑One Power Analysis

The 720301 module simplifies complex setups by combining voltage and current inputs in one unit. Integrated with Yokogawa’s DL950 and SL2000 recorders, it enables cycle‑by‑cycle power analysis from 0.1 ms. In addition, it supports trigger functions based on power parameters and harmonics, ensuring accurate correlation between power consumption and multi‑physics signals such as vibration, strain, and sound.

Meeting Industry Demands in Energy Storage and Electrification

As electrification accelerates, industries require precise evaluation of UPS systems, EV batteries, and data‑centre power supplies. Both modules address this demand by enabling accurate measurement of DC offset, power fluctuations, and micro‑level variations. Therefore, they provide engineers with reliable tools for quality control, R&D, and system integration.

Application in EV Battery Development

The 720252 module was designed for EV battery cells operating around 4.2 V. Its high‑impedance mode minimizes interference with cells that have milliohm‑level internal resistance. As a result, researchers can capture subtle fluctuations without compromising measurement accuracy. This capability is critical for battery lifecycle testing and advanced energy storage innovation.

Application in UPS and High‑Speed Data Acquisition

The 720301 module supports synchronised acquisition of power, voltage, current, and communication signals (CAN‑FD, LIN, SENT). Its fast computation enables detailed capture of power fluctuations during backup operations in UPS systems and emergency generators. Consequently, it ensures process reliability and operational safety in mission‑critical environments.

Author’s Commentary: Industry Impact and Trends

Yokogawa’s focus on precision reflects a broader industry trend—measurement accuracy is becoming a competitive differentiator. As factories adopt smarter automation and electrification, modules like the 720252 and 720301 will play a key role in bridging multi‑physics signals with power analysis. In my view, these innovations strengthen Yokogawa’s position as a trusted supplier in test and measurement for industrial automation.

Practical Use Cases and Solutions

• EV Battery R&D: Detecting micro‑voltage fluctuations during charge/discharge cycles.

• UPS Systems: Capturing power variations during backup transitions.

• Data Centres: Monitoring small current deviations in high‑density power supplies.

• Factory Automation: Synchronising power analysis with vibration and communication signals.