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SA2002HSA Datasheet(PDF) 7 Page - Sames |
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SA2002HSA Datasheet(HTML) 7 Page - Sames |
7 / 12 page sames sames SA2002H 7/12 http://www.sames.co.za Direction indication (DIRO) Note that the DIR output is not available in the DIP-8 package type. Figure 9 shows the behavior of DIR, when energy reversal takes place. The time period for the DIR signal to change state, t , is the time it takes for the internal integrator DIR to count (down) from its present value to zero. Thus the energy consumption rate determines the speed of change on DIR. DR-01283 DIR V I DIR t t t t Figure 9: Measured energy direction on DIR Mains zero crossing indication (FMO) Note that the FMO output is not available in the DIP-8 package type. The square wave signal of FMO indicates the polarity of the mains voltage. Due to comparator offsets, the FMO low to high transition can occur within a range as shown in figure 10. The time between successive low to high transitions will be equal to the mains voltage period. Figure 10: Mains zero crossings on FMO DR-01284 FMO MAINS t V t t |
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