As a professional technician in the field of Programmable Logic Controllers (PLCs), I have worked with numerous brands and models of PLCs. However, one brand that stands out to me is Mitsubishi. Their FX2N series PLCs are known for their reliability and user-friendly interface. In this article, I will be discussing the wiring diagram and method for the input circuit of Mitsubishi FX2N PLCs. So, let's dive in and learn more about this efficient and powerful PLC.
Before we dive into the wiring diagram, let's first understand the basics of an input circuit in a PLC. An input circuit is responsible for detecting and converting the signals from external devices, such as sensors and switches, into digital signals that the PLC can understand. These signals are then processed by the PLC to control various outputs. Now, let's take a look at the wiring diagram for the input circuit of Mitsubishi FX2N PLCs.
The input circuit of Mitsubishi FX2N PLC is divided into two sections - sink and source. In the sink section, the PLC's input module is connected to the positive terminal of the DC power supply, while the negative terminal is connected to the common terminal of the PLC. On the other hand, in the source section, the PLC's input module is connected to the negative terminal of the DC power supply, while the positive terminal is connected to the common terminal of the PLC. This configuration allows for both sink and source inputs to be used in a single PLC.
Now, let's take a closer look at the wiring method for the input circuit. The PLC's input module consists of 16 input points, which can be divided into two groups of 8 points each. In the sink section, each input point is connected to an external device, such as a sensor, through a current limiting resistor. This resistor protects the input circuit from any overvoltage or short circuit. Similarly, in the source section, each input point is connected to an external device through a current sinking transistor, which also provides protection to the input circuit.
To further understand the wiring method, let's take an example. Suppose we want to connect a normally open push button to the PLC's input module. In the sink section, the push button's positive terminal will be connected to the PLC's input point, while the negative terminal will be connected to the common terminal of the PLC. This way, when the push button is pressed, it will provide a path for the current to flow from the positive terminal to the input point, thus triggering the input signal. Similarly, in the source section, the push button's negative terminal will be connected to the PLC's input point, while the positive terminal will be connected to the common terminal of the PLC.
It is important to note that the input circuit of Mitsubishi FX2N PLCs can be configured for different input signals, such as DC, AC, and pulse. The wiring method may vary slightly depending on the type of input signal. However, the basic principles remain the same.
In conclusion, the input circuit of Mitsubishi FX2N PLCs is designed to be versatile and flexible, providing options for both sink and source inputs. The wiring diagram and method for the input circuit may seem complex at first, but with proper understanding and practice, it becomes easier to implement. I hope this article has given you a better understanding of the input circuit in Mitsubishi FX2N PLCs. As a professional PLC technician, I highly recommend this series for its reliability and efficient performance. Happy wiring!