The Omron H7ET-NV1 Counter is a robust time counter supporting DC voltage inputs from 4.5 to 30 VDC, ideal for monitoring machine operating hours. It offers selectable time ranges up to 999999.9 hours or 3999 days 23.9 hours, ensuring precise long-term tracking. Its 7-digit LCD with 8.6 mm characters provides clear visibility, supported by a reliable 20 ms reset response. Built with IP66 front protection and strong immunity to shock, vibration, and electrical noise, it ensures consistent performance. Manufactured by Omron and included in Omron Counter products, it forms part of the Omron H7ET Series.
Hight level: 4.5 to 30 VDC
Low level: 0 to 2 VDC (Input resistance Approx. 4.7 kΩ)
Display method
LCD
Display Digits
7 digit
External connections
Screw terminal
Counter Reset system
External and manual reset
Input mode
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 current carrying terminals and exposed non-current carrying metal parts: 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: ±600 V
Between backlight power terminals: ±480 V
Between timer input terminals: ±600 V
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)
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)
