Proper wiring is crucial for the correct operation of an encoder. This guide provides detailed wiring instructions for different types of encoders, including incremental and absolute types, with both NPN and PNP output configurations. Understanding the correct wiring method ensures accurate signal transmission between the encoder and the PLC (Programmable Logic Controller). For the NPN output incremental encoder model E6B2-CWZ6C, the wiring follows a specific pattern. The brown wire should be connected to the positive terminal of the power supply, while the blue wire connects to the negative terminal. The black wire is typically connected to input point 0.00, the white wire to 0.01, and the orange wire to 0.04. The PLC’s COM terminal is connected to the positive side of the power supply. Refer to Figure 1 for the schematic and Figure 2 for the actual wiring diagram. In contrast, the PNP output incremental encoder model E6B2-CWZ6B has a slightly different configuration. The brown wire still connects to the positive power supply, and the blue wire to the negative. The black, white, and orange wires are connected to input points 0.00, 0.01, and 0.04, respectively. However, in this case, the PLC’s COM terminal is connected to the negative side of the power supply. A visual representation of the wiring is shown in the following figure. For absolute encoders, such as the NPN output type E6C3-AG5C, the wiring involves more signal lines. The red wire is connected to the positive power supply, and the black wire to the negative. Each color-coded wire corresponds to a specific input point on the PLC: brown to 0.00, orange to 0.01, yellow to 0.02, green to 0.03, blue to 0.04, purple to 0.05, gray to 0.06, white to 0.07, and pink to 0.08. The PLC’s COM terminal is connected to the positive power supply. Figures 1 and 2 illustrate the wiring setup clearly. The PNP output absolute encoder model E6C3-AG5B follows a similar pattern but with the COM terminal connected to the negative power supply. The red wire is connected to +V, the black to 0V, and the remaining color-coded wires to various input points on the PLC. These include brown (0.00), orange (0.01), yellow (0.02), green (0.03), blue (0.04), purple (0.05), gray (0.06), white (0.07), and pink (0.08). The wiring diagram is provided below for reference. For line drive encoders, the wiring is more complex due to the presence of multiple channels. The black wire connects to A0+, and the combination of black and red wires connects to A0-. Similarly, the white wire connects to B0+, and the white and red wires connect to B0-. The orange wire is connected to Z0+, and the orange-red wire to Z0-. The brown wire connects to +5V, and the blue wire to 0V. No wiring errors are present in this configuration. A detailed wiring diagram is shown below for clarity.
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