Signal Isolator 4 20ma
Signal Isolator 4 20ma
Features:
Key Features
- Current Loop Isolation: Eliminates ground loops, common-mode noise, and electrical interference between 4–20 mA sensors and PLCs
- 2-Way Galvanic Isolation: Up to 1 kV RMS optical and magnetic isolation barrier between input and output/power
- True Analog Signal Isolation: Preserves loop dynamics and signal fidelity with a pure linear amplifier stage
- No PWM or Digital Reconstruction: Pure continuous analog processing without sampling ripple, ADC quantization, or conversion artifacts
- Fast Dynamic Response: Minimal signal processing latency (< 50 ms) for real-time process control and safety loops
- High Noise Immunity: Exceptional rejection of high-frequency electrical noise and common-mode transients
- High Conversion Accuracy: Precision linear calibration delivering < ±0.5% F.S. accuracy @ 25 °C
- Compact Industrial Enclosure: 35 mm DIN rail and wall-mount compatible housing (110 mm × 74 mm × 22 mm)
- 1-Year Warranty: Full 1-year warranty against manufacturing defects
- Factory Customizable: Custom input and output current spans available on request
Ordering Information
| Product Code | Description |
|---|---|
| AC-420-420 | Signal Isolator 4 20ma |
| AC-20mA-2 | Isolated 20mA splitter |
| SPD-20MA | 4-20mA Surge Protection Device SPD 4 to 20mA |
| USS20M24V-D | Current Source Simulator 0/4 to 20mA |
| SPD-24V-DC | Surge Protection Device 24V DC SPD |
Applications
- Ground Loop Elimination: Resolves ground potential differences between remote field transmitters and central control systems.
- PLC & DCS Analog Input Protection: Protects expensive automation analog input channels from voltage spikes and fault currents.
- Industrial Automation & Process Control: Reliable signal interfacing and device connectivity across automated production lines.
- SCADA & PLC Integration: Seamless communication between field instrumentation and control systems.
- Control Panel Building: Compact 35 mm DIN rail mounting for clean and space-efficient cabinet wiring.
Specifications
| Parameter | Value |
|---|---|
| Mounting Type | 35 mm DIN Rail Mounting |
| Dimensions | 110 mm x 74 mm x 22 mm (L x W x H) |
| Enclosure Material | Industrial ABS plastic |
| Operating Temperature | -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 | 24V DC (15 ~ 28V DC) |
| Conversion Accuracy | < ±0.5% of Full Scale @ 25 °C |
| Temperature Drift | < 100 ppm / °C |
| Galvanic Isolation | 1,000 V RMS (Input / Output) |
Input/Output Specifications
| Parameter | Value |
|---|---|
| Input Signal Range | 4–20 mA DC (Standard Industrial Current Loop) |
| Output Signal Range | 4–20 mA DC (Load <= 500 Ω) |
| Response Time | < 1 ms |
Isolation & Protection Specifications
| Parameter | Value | Standard / Notes |
|---|---|---|
| Galvanic Isolation | 1,000 V RMS | Optical and magnetic isolation barrier |
| Reverse Polarity Protection | Integrated | Protects internal circuitry against reverse DC wiring |
| Transient Clamping | 600W TVS | Surge and spike suppression across all ports |
Mechanical Dimensions
Terminal Details & Wiring
Pluggable industrial screw terminal block connections:
- Terminal 18 (+) / Terminal A2 (-): 4–20 mA DC Current Loop Input Signal
- Terminal 15 (OP+) / Terminal 26 (OP-): Isolated 4–20 mA DC Current Loop Output Signal
- Terminal A1 (V+) / Terminal 25 (GND): 24V DC auxiliary power supply
Wiring Diagrams
Note: All images and connection diagrams shown are for illustrative purposes only and may differ from the actual product.
Revision History
| Revision | Date | Description of Change |
|---|---|---|
| Rev 1.0 | 2026-09-09 | Initial datasheet release for AC-420-420 |
Get the latest version of this datasheet : click here..
Support
Website: www.veawe.io
Email: info@veawe.io