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Omron H7ER-NV-H Counter Self-powered Tachometer
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Omron H7ER-NV-H Counter

The Omron H7ER-NV-H Counter offers high-speed tachometer performance with selectable 1 kHz and 10 kHz input modes for precise monitoring of fast-moving machinery. Its backlit LCD improves visibility in low-light environments, while the 4.5–30 VDC voltage input supports seamless integration with encoders and sensors. Engineered for industrial reliability, it provides strong immunity to static, noise, vibration, and shock. The IP66-rated front panel ensures dependable use even in harsh conditions. Manufactured by Omron and categorized under Omron Counter products, this tachometer belongs to the Omron H7ER Series.

Omron H7ER-NV-H Counter
Datasheet
BrandOmron
ProductCounters
Model NumberH7ER-NV-H

Omron H7ER-NV-H 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 methodBacklit transmissive LCD
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. 65 g

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