The Omron H7ER-NV1 Counter provides versatile tachometer capability with selectable 1 kHz and 10 kHz speeds, enabling accurate measurement for low, medium, and high-speed machinery. Its 5-digit LCD delivers clear readings, supporting up to 10000 min-1 depending on encoder resolution. Designed for voltage input systems (4.5–30 VDC), it integrates easily with sensors and encoders. Engineered to withstand shock, vibration, noise, and static, it ensures dependable operation in industrial environments. Manufactured by Omron and listed under Omron Counter products, this unit is part of the Omron H7ER Series.
Voltage input: Hight level: 4.5 to 30 VDC
Low level: 0 to 2 VDC (Input resistance Approx. 4.7 kΩ)
Display method
LCD
Display Digits
5 digit
External connections
Screw terminal
Input mode
Voltage input
Tachometer Max. counting speed
0.5 ms(1 kHz)
0.05 ms(10 kHz)
Tachometer Max Display speed
1000.0 s-1(rps) (When encoder resolution of 10 pulse/rev is used.)
1000 min-1(rpm) (When encoder resolution of 600 pulse/rev is used.)
10000 min-1(rpm) (When encoder resolution of 60 pulse/rev is used.)
Display Character height
8.6 mm (Black)
Display Zero suppression
Equipped
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 count input terminals: ±500 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)
