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PA-21 AC DC Voltage Transmitter for Power Monitoring

A versatile AC/DC voltage transmitter with wide input range, isolated high-accuracy outputs, and flexible power options for reliable industrial monitoring.
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PA-21 Voltage Transmitter showing reliable ac voltage measurement conversion

Reliable Ac Voltage Measurement & Conversion

PA-21 is a voltage transmitter designed around “Reliable AC Voltage Measurement & Conversion.” Supports 100V, 380V, 500V for stable AC voltage measurement and system integration. The sensing structure converts the physical process variable into a clear signal for industrial monitoring and automation. The confirmed values highlighted here are 100V, 380V, 500V. The feature is directly relevant to power distribution, power monitoring and control cabinet projects. Improve measurement clarity and maintenance efficiency in power distribution applications, helping engineers keep the installation, inspection and signal path easier to manage during long-term operation.

PA-21 Voltage Transmitter showing flexible multi-channel industrial signal integration

Flexible Multi-channel Industrial Signal Integration

PA-21 is a voltage transmitter designed around “Flexible Multi-channel Industrial Signal Integration.” Multiple channel arrangements support centralized industrial signal monitoring. The channel and model arrangement makes it easier to match the number of field points without changing the overall cabinet architecture. The feature is directly relevant to power distribution, power monitoring and control cabinet projects. Handle more monitoring points with fewer separate cabinet modules, helping engineers keep the installation, inspection and signal path easier to manage during long-term operation.

PA-21 Voltage Transmitter showing stable industrial signal performance for industrial monitoring

Stable Industrial Signal Performance for Industrial Monitoring

PA-21 is a voltage transmitter designed around “Stable Industrial Signal Performance for Industrial Monitoring.” Supports 0.1V for stable industrial signal measurement and system integration. The stated operating range, accuracy, response, overload or stability feature supports more dependable data under changing field conditions. The confirmed values highlighted here are 0.1V. The feature is directly relevant to power distribution, power monitoring and control cabinet projects. Maintain clearer trend data during long-term industrial operation, helping engineers keep the installation, inspection and signal path easier to manage during long-term operation.

Working Principle Diagram

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Technical Specifications

Compatible Input Signals:AC/DC universal; range: 0–75 V/100 V/220 V/380 V/500 V/1000 V (customizable)


Signal Matching Frequency:AC standard 40–60 Hz power frequency; DC has no frequency limitation


Maximum Output Load Resistance (4–20 mA/0–20 mA Current Output):≤500 Ω


Minimum Output Load Resistance (0–5 V/0–10 V):≥10 kΩ


Step Response Time (Output Reaches 90% of Steady State):≤400 ms


Temperature Drift Coefficient (operating range: -20°C to +55°C):≤200 ppm/°C FS


Independent Linearity Error:±0.15% FS


Overall Accuracy of the Unit @ 25°C Ambient Temperature:Standard Class 0.5 ±0.5% FS; no high-precision custom ranges available


Standard Transmitter Output Signals:4–20 mA, 0–20 mA, 0–5 V, 0–10 V

Dimension Chart

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Wiring Diagram

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Phone: +86-19715617532
Add: Building 14, University Science and Technology Park, Fenghuangshan Economic Development Zone, Xiangshan District, Huaibei City, Anhui Province

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