The Omron H7ET-NFV1-B Counter is a robust time counter with universal free-voltage input compatibility from 24 to 240 VAC/VDC, ensuring broad application flexibility. It supports extensive timing ranges up to 999999.9 hours or 3999 days 23.9 hours, suitable for long-duration monitoring. The 7-digit LCD with 8.6 mm black characters provides excellent readability, supported by reliable 20 ms reset capability. With IP66 front protection and strong noise, vibration, and shock resistance, it performs consistently in industrial settings. Manufactured by Omron and categorized under Omron Counter devices, 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 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)
