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BST-U High Accuracy AC Voltage Transmitter for Power Monitoring

A high-accuracy, fully isolated AC/DC voltage transmitter with wide 40–400Hz range and flexible outputs for reliable PLC/DCS integration.
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High-accuracy AC Voltage Conversion

High-accuracy AC Voltage Conversion

BST-U is a voltage transmitter designed around “High-accuracy Ac Voltage Conversion.” Supports 0.2%F.S, AC for stable AC voltage 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 0.2%F.S, AC. The feature is directly relevant to control cabinet, power monitoring and industrial process 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.

Stable Signal Transmission over Long Cable Runs

Stable Signal Transmission over Long Cable Runs

BST-U is a voltage transmitter designed around “Stable Signal Transmission over Long Cable Runs.” The dedicated mechanical and connector structure simplifies installation, replacement and field maintenance. The dedicated mechanical, connector or mounting structure helps the instrument fit the intended pipe, tank, cabinet or equipment interface. The confirmed values highlighted here are 4–20mA. The feature is directly relevant to control cabinet, power monitoring and industrial process projects. Shorten installation time and simplify later field maintenance, helping engineers keep the installation, inspection and signal path easier to manage during long-term operation.

Slim DIN Rail Design Saves Cabinet Space

Slim DIN Rail Design Saves Cabinet Space

BST-U is a voltage transmitter designed around “Slim DIN Rail Design Saves Cabinet Space.” The dedicated mechanical and connector structure simplifies installation, replacement and field maintenance. The dedicated mechanical, connector or mounting structure helps the instrument fit the intended pipe, tank, cabinet or equipment interface. The confirmed values highlighted here are 25.4mm. The feature is directly relevant to control cabinet, power monitoring and industrial process projects. Shorten installation time and simplify later field maintenance, 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

Input Impedance:≥1 MΩ


Supported Input Voltage Ranges:AC 0–75 V, 0–1000 V (full range customizable)


Compatible Signal Frequencies:40–400 Hz (universal; compatible with power-frequency and medium-frequency equipment)


Maximum Output Load Resistance (4–20 mA Current Output):≤550 Ω


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


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


Temperature Drift Coefficient (-20°C to +55°C):50 ppm/°C FS


Independent Linearity Error:±0.05% FS


Overall Accuracy @ 25°C Ambient Temperature:±0.2% FS (Class 0.2)


Optional Channel Specifications:1 input, 1 output / 1 input, 2 outputs (dual independent isolated outputs)


Standard Output Signals:4–20 mA, 0–20 mA, 0–5 V, 1–5 V, 0–10 V, –1–5 V, RS485

Dimension Chart

L*W*H : 108mm x 25.4mm x 47mm

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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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