Product Description

​The Omron H7ET-NFV1-B is a compact, self-powered time counter designed for precise time measurement in industrial applications. It features a 7-digit LCD display with 8.6 mm high characters, facilitating easy reading. The device accepts a wide range of input voltages (AC/DC 24 to 240 V) and offers both external and manual reset options, enhancing flexibility in various operational settings.

Technical Specifications

• Function: Time Counter​
• DigiKey
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• Omron
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• Omron Automation
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• Time Measurement Range: 0.0 hours to 999,999.9 hours or 0.0 hours to 3,999 days 23.9 hours (selectable)​
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• Input Signal: Count input and reset​
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• Input Method: Free voltage input​
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• Input Voltage Levels:
• High Level: AC/DC 24 to 240 V​
• Low Level: AC/DC 0 to 2.4 V​
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• Reset Time:
• External Reset: 20 ms​
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• Manual Reset: 20 ms​
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• Display:
• Type: LCD​
• Character Height: 8.6 mm (black)​
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• Zero Suppression: Equipped​
• Key Protection: Key protect switch​
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• Operating Temperature Range: -10°C to 55°C (with no freezing or condensation)​
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• Storage Temperature Range: -25°C to 65°C (with no freezing or condensation)​
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• Operating Humidity Range: 25% to 85% RH​
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• Insulation Resistance: Between current-carrying terminals and exposed non-current-carrying metal parts: 100 MΩ min. (at 500 VDC)​
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• Dielectric Withstand Voltage: Between reset terminals and exposed non-current-carrying metal parts: 2,200 VAC 50/60 Hz for 1 minute​
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• Impulse Withstand Voltage: Between current-carrying terminals and exposed non-current-carrying metal parts: 4.5 kV​
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• Noise Immunity: Between reset terminals: ±500 V; between time input terminals: ±1.5 kV​
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• Vibration Resistance:
• Destruction: 10 to 55 Hz, 0.375 mm single amplitude each in 3 directions for 2 hours​
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• Malfunction: 10 to 55 Hz, 0.15 mm single amplitude each in 3 directions for 10 minutes​
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• Shock Resistance:
• Destruction: 300 m/s², 3 times each in 6 directions​
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• Malfunction: 200 m/s², 3 times each in 6 directions​
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• Degree of Protection: Front case: IP66, NEMA 4 (indoor), and UL Type 4X (indoor)​
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• Mounting Method: Flush mounting​
• External Connection Method: Screw terminal​
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• Case Color: Light gray (Munsell 5Y7/1)​
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• Weight: Approximately 60 grams​