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S8VS-06024A Datasheet(PDF) 9 Page - Omron Electronics LLC |
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S8VS-06024A Datasheet(HTML) 9 Page - Omron Electronics LLC |
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9 / 24 page  Switch mode Power Supply S8VS L-63 I Maintenance Forecast Monitor Function The power supply unit is equipped with electrolytic capacitors. The electrolyte inside the electrolytic capacitor penetrates the seal- ing rubber and evaporates as time passes since it is manufactured, which causes deterioration of characteristics such as decreasing the capacitance, etc. Due to this deterioration of the characteristics of the electrolytic capacitor, the power supply unit decreases its performance as time passes. The maintenance forecast monitor function shows an approximate period left for maintenance of the power supply unit due to deteriora- tion of electrolytic capacitors. When the period left for maintenance that the power supply forecasts reaches the set value, an alarm is indicated and an output signal is triggered. Use this function to know the approximate replacement timing of the power supply unit. Note: The maintenance forecast monitor function indicates an ap- proximate period left for maintenance, based on deterioration of the electrolytic capacitor. It does not predict failures caused by other reasons. Relationship Between Indicated Values and Output of Set Values I Principle of Operation The deterioration speed of the electrolytic capacitor varies consider- ably according to the ambient temperature. (Generally the speed fol- lows “Rule of Two for every 10°C”; for every 10°C increase in temperature the rate of degradation doubles according to Arrhenius’s equation.) The S8VS-0 @024A monitors the temperature inside the power supply, and calculates the amount of deterioration according to the running hours and inside temperature. Judging by this amount of deterioration, the power supply will give the alarm indication and output when the period left for maintenance reaches the set value. Note: 1. Due to degradation of internal electronic parts, replace the power supply at least once every 15 years even if indication and output of maintenance forecast monitor are not issued. 2. The maintenance forecast is accelerated or decelerated ac- cording to operating conditions. Periodically check indica- tion. I Reference Value Note: The “maintenance forecast” is the service life (the power sup- ply’s internal temperature is monitored at all times) of the inter- nal electrolytic capacitor in actual operating conditions, and varies according to the customer’s operating conditions. 15 years is taken as the maximum period of the maintenance fore- cast. (L −0.5) 5.0 L=2.5 L=0.5 2.5 2.0 1.5 1.0 0.5 0 Initial capacity "1.0" is displayed on the main display for the duration that the maintenance forecast up to replacement satisfies the condition 1.0 ≤ T < 1.5. L: Maintenance forecast set value (See note.) 0.0 to 5.0, 0.5 steps In case of setting L between 2.5 and 5 years. Maintenance forecast monitor output T: Maintenance time until replacement The numerical value decreases with time. Main display Capacity of Capacitor Capacity level at replacement Note: This function can be set only on the S8VS-09024A Model. Item Value Definition Reliability (MTBF) 135,000 hrs min. MTBF stands for Mean Time Between Failures, which is calculated according to the probability of accidental device fail- ures, and indicates reliability of devices. Therefore, it does not necessarily repre- sent a life of the product. Life expectancy 10 yrs. min. The life expectancy indicates average op- erating hours under the ambient tempera- ture of 40°C and a load rate of 50%. Normally this is determined by the life ex- pectancy of the built-in aluminum electro- lytic capacitor. |
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