The Omron H7ET-NFV Counter is a versatile time counter supporting universal free-voltage input from 24 to 240 VAC/VDC, enabling broad compatibility across machinery. It provides flexible measurement ranges up to 999999.9 hours or 3999 days 23.9 hours, making it ideal for long-term operation tracking. Its 7-digit LCD with 8.6 mm characters ensures clear reading, while a 20 ms reset response enhances usability. Robust IP66 front protection and strong resistance to noise, shock, and vibration ensure stable performance. Manufactured by Omron and part of the Omron Counter lineup, this model belongs to 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 reset terminals and exposed non-current-carrying metal parts: 2200 VAC 50/60 Hz 1 min
Between timer input terminals and exposed non-current-carrying metal parts: 3700 VAC 50/60 Hz 1 min
Between timer input terminals and reset terminals: 2200 VAC 50/60 Hz 1 min
Impulse withstand voltage
Between current carrying terminals and exposed non-current carrying metal parts: 4.5 kV
Between timer input terminals and reset terminals: 3 kV
Noise immunity
Between reset terminals: Β±500 V
Between timer input terminals: Β±1.5 kV
square-wave noise by noise simulator (pulse width: 100 ns/1 Β΅s, 1-ns rise)
