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Omron H7ER-NV-B Counter

The Omron H7ER-NV-B Counter is designed for rotational speed measurement requiring selectable 1 kHz or 10 kHz input capability. Its 4-digit LCD with 8.6 mm characters ensures excellent visibility, while the voltage-input method supports 4.5–30 VDC PNP/NPN encoder signals. Built for industrial strength, it offers high resistance to ESD, noise, vibration, and mechanical shock. With an IP66-rated front, it operates reliably in tough conditions. Manufactured by Omron and listed under Omron Counter products, this tachometer model belongs to the Omron H7ER Series.

BrandOmron
ProductCounters
Model NumberH7ER-NV-B

Omron H7ER-NV-B Counter - Technical Specifications

SpecificationValue
FunctionTachometer
Preset stages1 kHz/10 kHz (selectable)
Input signalCount input
No-voltage input (Contact input)Voltage input: Hight level: 4.5 to 30 VDC Low level: 0 to 2 VDC (Input resistance Approx. 4.7 kΩ)
Display methodLCD
Display Digits4 digit
External connectionsScrew terminal
Input modeVoltage input
Tachometer Max. counting speed0.5 ms(1 kHz) 0.05 ms(10 kHz)
Tachometer Max Display speed1000 s-1(rps) (When encoder resolution of 1 pulse/rev is used.) 1000 min-1(rpm) (When encoder resolution of 60 pulse/rev is used.)
Display Character height8.6 mm (Black)
Display Zero suppressionEquipped
Ambient temperature (Storage)-10 to 55 ℃ (with no freezing or condensation)
Ambient humidity (Operating)25 to 85 %
Dielectric withstand voltageBetween current carrying terminals and exposed non-current carrying metal parts: 1000 VAC 50/60 Hz 1 min
Impulse withstand voltageBetween current carrying terminals and exposed non-current carrying metal parts: 4.5 kV
Noise immunityBetween 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 resistanceBetween current carrying terminals and exposed non-current carrying metal parts: 100 MΩ min. (at 500 VDC)
Shock resistanceDestruction: 300 m/s2, 3 times each in 6 directions Malfunction: 200 m/s2, 3 times each in 6 directions
Degree of protectionCase front: IP66, NEMA 4 (indoors), and UL Type 4X (indoors)
Case colorLight gray (Munsell 5Y7/1)
WeightApprox. 60 g