Block single phase non stabilised dc power supply glc series block glc 23024 5 the block glc 23024 5 non regulated din rail power supply unit from the glc series is ideal for use with voltage control applications power supply units with the same output current ratings can be connected in parallel to increase the total power requirements the maximum loading in this connection mode is however only 90 of the combined power ratings of the two units block glc 23024 5 120w enclosed power