Isolated Analog Signal Converter 150V ...
The AC-150V-420 is an industrial precision high-voltage analog signal conditioner designed to convert 0–150V DC voltage levels into an industry-standard, isolated 4–20mA active current loop signal. Built with a pure linear analog isolation amplifier without PWM conversion or digital reconstruction, it achieves ultra-fast response time (< 1 ms) and exceptional signal fidelity (< ±0.1% output ripple). With a robust 4.25 kV RMS galvanic isolation barrier between high-voltage input and low-voltage control circuitry, it safely translates high DC voltages into noise-immune current loops for long factory cable runs, protecting PLC and DCS analog input modules from dangerous ground loops, high common-mode potentials, and electrical transients.
Key Features
- 0–150V DC high-voltage input to 4–20mA isolated current loop output
- 4.25 kV RMS galvanic isolation between input and output
- 1.5 kV RMS isolation between input and auxiliary power
- Ultra-fast response time (< 1 ms) for dynamic bus monitoring
- Drives loop loads up to 500 Ω with ±0.2% full-scale accuracy
- Pure analog linear amplifier topology with zero digital sampling artifacts
- Front-panel multi-turn Zero and Span calibration potentiometers
- 24V DC auxiliary power supply (18V to 30V DC operating range)
- Compact 22 mm DIN rail and wall mountable enclosure
- Dimensions: 100 mm × 76 mm × 22 mm
Ordering Information
| Product Code | Description |
|---|---|
| AC-150V-420 | Isolated High Voltage Converter 0–150V DC to 4–20mA (24V DC, 4.25kV Isolation) |
| AC-150V-10V | Isolated High Voltage Converter 0–150V DC to 0–10V DC |
| AC-300V-10V | Isolated High Voltage Converter 0–300V DC to 0–10V DC |
| AC-70V-420 | Isolated High Voltage Converter 0–70V DC to 4–20mA |
| SPD-20MA | 4–20mA Surge Protection Device |
| USS20M24V-D | Current Source Simulator 0/4 to 20mA with Digital Display |
Applications
- Battery Energy Storage Systems (BESS): Transmitting battery bank string voltage telemetry over long distances as a 4–20mA current loop.
- Telecom -48V / 120V DC Power Monitoring: Interfacing DC rectifier bus voltages directly into remote RTU/PLC current inputs.
- Traction & Light Rail Systems: Monitoring auxiliary 110V/150V DC power buses with high noise immunity.
- Solar Photovoltaic Combiner Boxes: Converting PV string voltages into 4–20mA signals for SCADA monitoring.
- Industrial DC Drive Systems: Safe voltage feedback from intermediate DC rails with high galvanic isolation.
Specifications
| Parameter | Value |
|---|---|
| Mounting Type | 35 mm DIN Rail & Wall Mounting |
| Dimensions | 100 mm x 76 mm x 22 mm (L x H x W) |
| Weight | 100 g |
| Enclosure Material | Industrial Grade ABS |
| Operating Temperature | 0 °C to +50 °C (Industrial: -10 °C to +60 °C) |
| Storage Temperature | -40 °C to +85 °C |
| Relative Humidity | 5% to 95% RH (non-condensing) |
Electrical Specifications
| Parameter | Specification |
|---|---|
| Power Supply Voltage | 24V DC \(\pm 25\%\) (18V to 30V DC) |
| Operating Current | 100 mA @ 24V DC |
| Input Signal Range | 0.0 V to 150.0 V DC (High Voltage DC) |
| Input Impedance | \(> 500\,\text{k}\Omega\) |
| Output Signal Range | 4.00 mA to 20.00 mA (Active Current Loop, Load \(\le 500\,\Omega\)) |
| Conversion Accuracy | \(\pm 0.2\%\) of Full Scale @ 25 °C (max \(\pm 0.5\%\)) |
| Output Ripple Noise | \(< \pm 0.1\%\) of Full Scale |
| Response Time | \(< 1\text{ ms}\) (< 1 milliSec) |
| Temperature Drift | \(< 100\text{ ppm} / \text{°C}\) |
| Status Indication | Power LED ON (PWR) |
| Field Calibration | Front-panel multi-turn Zero and Span trimpots |
Isolation & Protection Specifications
| Parameter | Value | Standard / Notes |
|---|---|---|
| Galvanic Isolation (Input to Output) | 4,250 V RMS (4.25 kV) | Optical & magnetic isolation barrier (1 min) |
| Galvanic Isolation (Input to Aux. Power) | 1,500 V RMS (1.5 kV) | Continuous dielectric isolation |
| Output to Aux. Supply | Shared Common Ground | Non-isolated reference ground |
| Reverse Polarity Protection | Integrated | Protects internal circuitry against reverse DC supply wiring |
| Transient Clamping | 600W TVS | Surge and spike suppression across all ports |
Functional Isolation Architecture & Dynamic Response
The pure linear analog architecture provides true continuous signal isolation without quantization stepping or switching ripples.
Oscilloscope Dynamic Waveform Verification
Oscilloscope measurement verifying that the isolated output signal reproduces the input waveform with sub-millisecond response latency (< 1 ms) and clean signal fidelity:
Mechanical Dimensions
Terminal Details & Wiring
Connection Pinouts
| Terminal Block | Pin | Label | Signal | Description |
|---|---|---|---|---|
| Input Terminals | 18 | 18 + | HV Input (+) | 0–150V DC High Voltage Input (+) |
| (Bottom Block) | A2 | A2 - | HV Input (-) | High Voltage Input Ground Return (-) |
| – | NC | Unused | Reserved / Not Connected | |
| – | NC | Unused | Reserved / Not Connected | |
| Output Terminals | 15 | 15 OP+ | Output (+) | Active 4–20mA Analog Output (+) |
| (Top Block) | 26 | 26 OP- | Output (-) | Analog Output Ground Return (-) |
| Power Terminals | A1 | A1 V+ | +24V DC | Auxiliary Power Supply Input (+24V DC) |
| (Top Block) | 25 | 25 GND | Power 0V | Auxiliary Power Supply Ground Return |
Available Variants & Configurations
The Veawe Precision Analog Isolator family is available in standardized and custom input/output configurations:
| Signal Converter Input | Output | High Voltage Input | Output | Transducer Input | Output |
|---|---|---|---|---|---|
| 0–20 mA | 0–20mA, 4–20mA, 0–10V, ±10V | 30V DC | 0–20mA, 4–20mA, 0–10V | Pt100 | 0–20mA, 4–20mA, 0–10V |
| 4–20 mA | 0–20mA, 4–20mA, 0–10V, ±10V | 70V DC | 0–20mA, 4–20mA, 0–10V | Pt1000 | 0–20mA, 4–20mA, 0–10V |
| 0–10 V DC | 0–20mA, 4–20mA, 0–10V, ±10V | 100V DC | 0–20mA, 4–20mA, 0–10V | K type | 0–20mA, 4–20mA, 0–10V |
| 0–5 V DC | 0–20mA, 4–20mA, 0–10V, ±10V | 150V DC | 0–20mA, 4–20mA, 0–10V | J type | 0–20mA, 4–20mA, 0–10V |
| 75 mV DC | 0–20mA, 4–20mA, 0–10V, ±10V | 300V / ±300V DC | 0–20mA, 4–20mA, 0–10V | Resistance | 0–20mA, 4–20mA, 0–10V |
| ±75 mV DC | 0–20mA, 4–20mA, 0–10V, ±10V | 350V DC | 0–20mA, 4–20mA, 0–10V | — | — |
| — | — | 100V AC | 0–20mA, 4–20mA, 0–10V | — | — |
| — | — | 5A AC (CT) | 0–20mA, 4–20mA, 0–10V | — | — |
LED Indications and Diagnostics
| LED | Color | Status | Description |
|---|---|---|---|
| PWR | Green | ON | Auxiliary 24V DC operating power connected and regulated |
Revision History
| Revision | Date | Description of Change |
|---|---|---|
| Rev 1.0 | 2026-09-09 | Initial datasheet release |
Get the latest version of this datasheet : click here..
Support
Website: www.veawe.io
Email: info@veawe.io