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Omron H7ER-N-B Counter

The Omron H7ER-N-B Counter provides accurate tachometer functionality with a 1 kHz input speed and 0.5 ms response time for reliable speed measurement. Its clear 4-digit LCD ensures easy reading, while the no-voltage input method supports simple wiring with switches and mechanical sensors. Built for industrial durability, it withstands noise, shock, vibration, and electrostatic discharge. The IP66 front panel and wide operating temperature range enable dependable use in demanding environments. Manufactured by Omron and positioned under Omron Counter products, this model is part of the Omron H7ER Series.

BrandOmron
ProductCounters
Model NumberH7ER-N-B

Omron H7ER-N-B Counter - Technical Specifications

SpecificationValue
FunctionTachometer
Preset stages1 kHz
Input signalCount input
No-voltage input (Contact input)Short-circuit (ON) impedance: 10 kΩ max. Residual voltage: 0.5 V max. (Actual performance 1.0 V) Open circuit impedance: 750 kΩ min.
Display methodLCD
Display Digits4 digit
External connectionsScrew terminal
Input modeNo-voltage input
Tachometer Max. counting speed0.5 ms(1 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

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