H7EC-NV Self Powered, H7E Series, 8 Digits, PNP/NPN DC Voltage Input. The H7EC-NV-BH is a flush-mount Self-powered Totalizer with PNP/NPN universal DC voltage input and 7-segment LCD with backlight display. It has 100MΩ minimum (at 500VDC) between current-carrying metal parts and exposed non-current carrying metal parts and between the backlight power supply terminal and count input terminals/reset terminals for backlight model insulation resistance and 4.5kV between current-carrying terminal and exposed non-current-carrying metal parts impulse withstand voltage. It is a subminiature total counter with improved appearance.