The Omron H7ET-NV-BH Counter is a backlit time counter designed for installations where high visibility is essential, even in dim environments. It supports wide timing ranges up to 999999.9 hours or 3999 days 23.9 hours, ensuring reliable long-term monitoring. With voltage input support from 4.5 to 30 VDC and a dependable 20 ms reset response, it integrates smoothly with automation signals. Its IP66-rated front and robust shock, vibration, and noise immunity offer stable field performance. Manufactured by Omron and included under Omron Counter categories, this model is part of the Omron H7ET Series.
0.0 h to 999999.9 h/0.0 h to 3999 d 23.9 h (selectable)
Time counter Set value read selector
Β±100 ppm (25 β)
External/Manual Reset time
20 ms
Ambient temperature (Storage)
-10 to 55 β (with no freezing or condensation)
Ambient humidity (Operating)
25 to 85 %
Dielectric withstand voltage
Between current carrying terminals and exposed non-current carrying metal parts: 1000 VAC 50/60 Hz 1 min
Between backlight power terminals and timer input/reset terminals: 1000 VAC 50/60 Hz 1 min
Impulse withstand voltage
Between current carrying terminals and exposed non-current carrying metal parts: 4.5 kV
Noise immunity
Between reset terminals: Β±600 V
Between backlight power terminals: Β±480 V
Between timer input terminals: Β±600 V
square-wave noise by noise simulator (pulse width: 100 ns/1 Β΅s, 1-ns rise)
