Block din rail power supply single phase 24vdc pc 0124 series block pc 0124 100 1 the block pc 0124 100 1 is a single phase primary switched mode din rail power supply that combines the basic functionality of an economic switched mode power supply with key additional features to ensure high system availability the power supply is a powerful and flexible option thats still light and compact the power supply unit is suitable for a highly diverse range of applications in solar measurement