Analysis of the causes of Omron S8 series switching power supply failures

Create Date: 2024-8-30 12:03:23|Source: Omron/Omron

1. Fault phenomenon: After powering on, the power supply does not respond.

2. Cause of failure:

(1) The input power supply voltage is insufficient and does not reach the specified range.

(2) The input power supply voltage is instantaneously impulsed, resulting in damage to the input components (such as fuses, rectifications, etc.), as shown in the figure:

(3) The output terminal is overloaded or short-circuited, resulting in damage to the voltage conversion circuit components (such as power tubes, etc.).

3. Precautions:

(1) Make sure the input power supply voltage is within the specified range:

(2) Ensure that the output load of the switching power supply is within the specified range:

(3) A 1:1 isolation transformer can be installed at the input end of the power supply to be installed in isolation from high-power or high-frequency equipment.

(4) The ground wire of the module should not be co-ground with high-power or high-frequency equipment.

(5) The power cord is wired separately from the high-current power cable.
Analysis of the causes of Omron S8 series switching power supply failures

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