4-20mA to 0-10V Converter Schematic
Introduction
In industrial automation, 4-20mA current loops are widely used to transmit analog signals over long distances. However, many devices and systems require a 0-10V voltage signal for processing or display. To convert a 4-20mA signal to a 0-10V signal, a specialized converter is needed. In this article, we will discuss a simple and effective converter schematic to achieve this conversion.
Principle of Operation
The 4-20mA to 0-10V converter works on the principle of current-to-voltage conversion. The input 4-20mA signal is first converted to a voltage signal using a resistor, and then amplified and scaled to produce a 0-10V output signal.
Converter Schematic
The converter schematic is shown below:
+-----------+
| |
| R1 |
| 250 Ohm |
+-----------+
|
|
v
+-----------+
| |
| OP07 |
| Op-Amp |
+-----------+
|
|
v
+-----------+
| |
| R2 |
| 2k Ohm |
+-----------+
|
|
v
+-----------+
| |
| R3 |
| 5k Ohm |
+-----------+
|
|
v
+-----------+
| |
| Vout |
| 0-10V |
+-----------+
Components
- R1: 250 Ohm resistor
- OP07: Op-Amp (e.g., LM741 or OP07)
- R2: 2k Ohm resistor
- R3: 5k Ohm resistor
- Vout: Output voltage (0-10V)
Working
- The input 4-20mA signal is applied to R1, which converts the current to a voltage signal.
- The voltage signal is then amplified and scaled by the OP07 op-amp.
- The output of the op-amp is connected to R2 and R3, which form a voltage divider network.
- The output voltage (Vout) is taken across R3 and is proportional to the input current.
Advantages
- Simple and cost-effective design
- High accuracy and linearity
- Low power consumption
- Can be used in a wide range of industrial applications
Conclusion
The 4-20mA to 0-10V converter schematic presented in this article is a simple and effective solution for converting 4-20mA current signals to 0-10V voltage signals. The converter can be used in a wide range of industrial applications, including process control, automation, and monitoring systems.
