If an industrial switch experiences a power supply failure during use, what are some common power supply failures in industrial switches?
1. The device cannot be powered on.
This is a common type of customer complaint: the switch cannot be powered on or, after being powered on, the industrial switch has no display and the power indicator light is off. This usually indicates a problem with the power input section of the device.
Industrial switches typically require adjustments to their input voltage due to electromagnetic compatibility (EMC) requirements. Common-mode surface-mount inductors are a commonly used component, found in many of our company's switches. Surprisingly, these relatively large inductors with only four solder points frequently experience poor soldering, preventing the equipment from powering on. This also indicates basic soldering errors in our machines. Additionally, surge protection devices such as varistors and TVS diodes, if damaged or leaking, can also cause power failures. Of course, problems with power conversion components are the most direct cause. Failures in switching power supplies, power modules, and filters are also common, manifesting as input short circuits, input overcurrent, no output, output undervoltage, or inability to drive the load.
II. The device fails to start upon power-up.
This is also a common customer complaint: after the industrial switch is powered on, all indicator lights remain on, or only the power indicator light is on, and the device does not work. In this case, the power input is normal, but the power supply on the mainboard is faulty.
Industrial switch motherboards are typically equipped with various power supply devices required for operation. These power supply devices provide the necessary voltage and current for the normal operation of the industrial switch. These power supply devices are usually surface-mount packaged, and poor soldering of surface-mount devices is inevitable for the machine. The proportion of poor soldering of power chips encountered in operation is quite high.
