Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
DC P Pow wer SSupp pliess Redundan nt vs. UPS How to Ch H hoose the Right Onee Redundant – Keeps the system m operatingg when a po ower supplyy fails UPS – Pro otects again nst power o outages ww ww.Omron247.com A Application Brrief How w to C Choosse thee Rigght Power Su upplyy Solu ution Introduction Reddundant Pow wer Supply Syystems Both a Redu undant Powerr supply systeem and a DC A reedundant pow wer supply sysstem consistss of two UPS (uninterrruptable Pow wer Supply) syystem serve (or m more) similarrly sized AC ‐ D DC power sup pplies a purpose in n an industriall control paneel. If the instaalled along w with a diode syystem that preevents 24VDC powe er supply failss, a UPS does not help; a feeddback to connnected powerr supplies. Th his redundant p power supply continues to operate. systtem is wired inn a way to allow both pow wer When the po ower goes do own, a redund dant power suppplies to providde DC voltagee to the samee load. supply does nothing; but a UPS allows time to take (Figuure 1) The Om mron Redundancy Units S8 8VK‐R10 action. Understanding eaach system will help make and S8VK‐R20 coontain the Dio ode system an nd a n different a choice as tto the best system to use in deteection circuit to monitor th he status of both applications. pow wer supplies. Figure 1 Om mron’s Redund dant Power Su upplies DC Power Sup pplies: Redun ndant Power SSupply vs. UPS D 2 A Application Brrief The Redundancy unit is designed to prroperly is 500mV or less. By adjusting tthe input volttage between the ttwo power balance the output load b untiil the LED is O ON the outputt current of each ectively using each power ssupply. supplies effe pow wer supply will be balanced d. By balanciing the When the po ower suppliess are correctlyy sized this loadd the operatinng life of each h power supply will extend tthe life of each power supp ply by sho uld be more tthan twice wh hen compared to drawing halff the load current from eacch power usinng only one poower supply. supply. The Redundant un nit is also in p place to mplete current load from properly transfer the com one power ssupply to the other if one sshould fail. The Omron redundancy u units (S8VK‐R1 10 and dancy monitorr system S8VK‐R20) have a redund that includess a redundanccy operating LED, voltage balance LED and a signal output for faiilure of a undancy operaating LED power supplly. The redu will turn ON when the inp put voltage difference is ower supply 2.4V or less. The led will tturn off if a po nnection error causes one power fails or a con supply not to o provide volttage. The voltage balance LED indicates when the voltagge difference DC Uninterruptable Power SSupply (UPS)) Systtems Thee DC UPS systeem consists o of an AC‐DC po ower sup ply; UPS conttrol unit and aa lead acid battery. help provide p power (Fig ure 2) Thesee 3 parts can h up tto 40A for 30 minutes. This system will con tinue to operrate when theere is a powerr outage but may not provvide power if one of the 3 parts m will operate until the com mputers failss. The system can proper save and safely shutdown the PS equuipment. The proper sizingg of the DC UP Chaarging unit andd the battery size is requirred and cou ld increase thhe cost of thee complete sysstem. Figure 2 Uniinterruptible Power Supplyy (UPS) DC Power Sup pplies: Redun ndant Power SSupply vs. UPS D 3 A Application Brrief The UPS systtem will require weekly an nd monthly If thhe system hass a critical memory compon nent or maintenance e to make surre the system is operating musst finish a process during a power outagge then properly. Just like a Monthly test of a battery a DC C UPS system should be ussed. The UPS system operated exit light system m the UPS system should will keep the com mputers up an nd running un ntil a he battery is ccharged and be tested to make sure th propper save operration and saffe shut down mode the UPS control unit is properly directing power to can be reached. The cost will increase with h the the load. amoount of equipment requirin ng power from m the UPSS battery. When to Usse Each Type e The two systems, redundant p power suppliees and The Redundant power supply system is a cost effective way for industrial application ns like food & beverage paackaging, material handlingg or conveyors to o always operrate during standard hours of manufacturing. In most automated UPS do not offfer a solution n to the samee DC U induustrial manufaacturing prob blem. Carefully chooosing the correct solution can keep the mannufacturing up and runningg and save mo oney at the same time. manufacturing and distrib bution facilitiees if the complete plaant power goes out then the operators cannot workk. A redundan nt system helps eliminate any down tim me due to component failu ure. DC Power Sup pplies: Redun ndant Power SSupply vs. UPS D 4 T35I‐E‐01 Notte: Specifications aare subject to chan nge © 2014 Omron Electroniccs LLC Printed d in U.S.A.