Current Source Simulator 0/4 to 20mA
Current Source Simulator 0/4 to 20mA USS20M24V-D
The USS20M24V-D is a precision 3-wire 0/4–20mA analog current source generator featuring an integrated 4-digit red 7-segment LED display. Engineered to assist automation engineers, maintenance technicians, and system integrators during testing, calibration, and commissioning, it simulates 0–20mA and 4–20mA process sensor signals to verify PLC analog inputs, DCS cards, SCADA systems, chart recorders, and valve positioners.
Key Features
- Active 3-wire 0/4–20mA current generation from 24V DC power
- Jumper-selectable 0–20mA or 4–20mA output range
- 4-digit 7-segment LED display with 0.01 mA readout resolution
- 5-turn precision wirewound potentiometer for fine current adjustment
- High output drive capability powering loop loads up to 1,100 Ω
- Input reverse polarity and continuous output short-circuit protection
- Standard 48 mm × 48 mm panel mount enclosure
- Dimensions: 48 mm × 48 mm × 90 mm
Ordering Information
| Product Code | Description |
|---|---|
| USS20M24V-D | Current Source Simulator 0/4 to 20mA (with 4-Digit Display, 24V DC, Panel Mount) |
| USS10V24V-D | Voltage Source Simulator 0-10V (with 4-Digit Display, 24V DC) |
| USS20M24V-P | Current Source Simulator 0/4 to 20mA (Without Display, 24V DC) |
| USS20M230V-D | Current Source Simulator 0/4 to 20mA (with Display, 230V AC Input) |
| USS20M24V-2P | Dual Output Current Source Simulator (DIN Rail Mountable, 24V DC) |
| ULS20M24V-P | Loop Current Source Simulator 4-20mA (2-Wire, Panel Mount) |
| SPD-20MA | 4-20mA Surge Protection Device |
Applications
- PLC & DCS Analog Input Validation: Injecting precise 4–20mA or 0–20mA currents to verify analog module scaling, calibration curves, and alarm setpoints.
- Pressure, Level & Temperature Transmitter Simulation: Simulating field sensors (pressure transmitters, RTD/thermocouple transmitters, level probes) during system development and wet testing.
- Control Valve & Damper Actuator Testing: Calibrating electro-pneumatic positioners, I/P converters, and proportional motorized valves.
- Telemetry & SCADA Troubleshooting: Rapid benchtop testing of telemetry RTUs, data loggers, and chart recorders.
Specifications
| Parameter | Value |
|---|---|
| Mounting Type | Panel Mounting (with side clamping brackets) |
| Dimensions | 48 mm x 48 mm x 90 mm (W x H x D) |
| Preferred Panel Cutout | 45 mm x 45 mm |
| Weight | Approximately 150 g |
| Enclosure Material | Industrial Grade ABS |
| 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 External |
| Display Type | 4-digit red 7-segment LED display |
| Output Current Range | 0/4 mA to 20 mA (jumper selectable) |
| Output Accuracy | \(\pm 1\%\) of Full Scale |
| Adjustment Mechanism | 5-turn wirewound precision potentiometer |
| Adjustment Resolution | \(\ge 0.01\text{ mA}\) step resolution |
| Load Resistance Range | \(10\,\Omega \text{ to } 1.1\,\text{k}\Omega\) |
| Reverse Polarity Protection | Integrated series protection diode |
| Short Circuit Protection | Continuous electronic current limiting |
Mechanical Dimensions
| Parameter | Value |
|---|---|
| Bezel Dimensions | 48 mm x 48 mm (W x H) |
| Depth Behind Panel | 90 mm (including rear terminals) |
| Panel Cutout | 45 mm x 45 mm (+0.5 mm) |
| Mounting Type | 1/16 DIN Panel Mount with side clamping brackets |
Terminal Details & Wiring
Terminal Connections & Jumper Configuration
The USS20M24V-D features a rear screw terminal block for power connection, active current output, and range selection.
| Terminal Pin | Label | Function | Description |
|---|---|---|---|
| 1 | 1 V+ | DC Power Positive | +24V DC Power Supply Input |
| 2 | 2 V- | DC Power Negative | 0V / Power Ground Return |
| 4 | 4 Out+ | Current Output (+) | Active 0/4–20mA Current Output Signal |
| 5 | 5 Out- | Current Output (-) | Current Return / Signal Ground |
| 6 & 7 | Jumper | Range Mode Selection | Closed (Bridged): 0 to 20 mA range Open: 4 to 20 mA range |
| 9 & 10 | NC | Reserved | No Connection |
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