The Omron H7ET-NFV1 Counter is designed for long-duration time tracking, supporting universal free-voltage input from 24 to 240 VAC/VDC. It offers flexible timing ranges reaching 999999.9 hours or 3999 days 23.9 hours, ensuring accurate measurement over extended periods. Its 7-digit LCD with 8.6 mm characters provides clear visibility, while a dependable 20 ms reset response enhances control. The unit features robust IP66 front protection and high resistance to noise, shock, and vibration, enabling use in demanding environments. Manufactured by Omron and listed within Omron Counter products, this device belongs to the Omron H7ET Series.
Hight level: 24 to 240 VAC/VDC
Low level: 0 to 2.4 VAC/VDC
Short-circuit (ON) impedance: 10 kΩ max.
Open circuit impedance: 750 kΩ min.
Display method
LCD
Display Digits
7 digit
External connections
Screw terminal
Counter Reset system
External and manual reset
Input mode
Free voltage input
Display Character height
8.6 mm (Black)
Display Zero suppression
Equipped
Time counter ranges
Increment (UP)
counter Time ranges
0.0 h to 999999.9 h/0.0 h to 3999 d 23.9 h (selectable)
Time counter Set value read selector
±100 ppm (25 ℃)
External/Manual Reset time
20 ms
Ambient temperature (Storage)
-10 to 55 ℃ (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: ±500 V
Between timer input terminals: ±1.5 kV
square-wave noise by noise simulator (pulse width: 100 ns/1 µs, 1-ns rise)
Static immunity
±8 kV (malfunction)
Vibration resistance
Between current carrying terminals and exposed non-current carrying metal parts: 100 MΩ min. (at 500 VDC)
Between timer input terminals and reset terminals: 100 MΩ min. (at 500 VDC)
Shock resistance
Destruction: 300 m/s2, 3 times each in 6 directions
Malfunction: 200 m/s2, 3 times each in 6 directions
Degree of protection
Case front: IP66, NEMA 4 (indoors), and UL Type 4X (indoors)
