The Omron H7ET-NFV-B Counter provides universal free-voltage input from 24 to 240 VAC/VDC, making it adaptable to wide-ranging industrial systems. Its time counter function supports long measurement spans up to 999999.9 hours or 3999 days 23.9 hours. Featuring a bright 7-digit LCD with 8.6 mm characters, it offers excellent visibility for operators. The device includes external and manual reset capability with a stable 20 ms response time. Designed with IP66 front sealing and strong immunity to noise and shock, it ensures reliable operation. Manufactured by Omron and included under Omron Counter solutions, this model is part of 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)
