OMRON H7EC-NFV Self-Powered 8-Digit Total Counter

Répartition du code modèle

H7EC-NFV

H7EC: Série, compact panel-mounted self-powered total counter

N: Totalizing counter (count-up only, no output contacts)

FV: Free Voltage Input AC/DC 24～240V (wide-range universal AC/DC signal input)

Suffix Distinction:

1. Without suffix -B: Light gray housing; H7EC-NFV-B: Black housing of omron
2. Without suffix -H: No backlight (standard configuration for this model); suffix -H denotes 24V backlight (this model has no backlight version)
3. Core Basic Specifications

2.1 Mécanique & Montage

Standard cutout size: 1/32 DIN panel cutout 48mm(W) × 24mm(H)

Dimensions hors tout: 48(W) × 24(H) × 48.5(D) mm

Montage: Panel flush mounting, waterproof gasket supplied as standard; mounting bracket Y92F-34 available as an option

Terminaux: 4-position screw terminals; wire-wrapping terminal kit Y92S-37 sold separately if required

2.2 Counting Performance

Afficher: 8-digit LCD, digit height 8.6mm, full scale range 0～99999999

Counting mode: UP count only, no down-count function

Max counting frequency: 20Hz, minimum input pulse width 25ms (rapport de service 1:1)

Reset methods: Manual reset button on unit + external terminal reset; reset response time 20ms

Key lock: Built-in DIP switch to lock manual reset and prevent accidental zeroing

2.3 Alimentation (Fonctionnalité de base: Self-powered, aucune alimentation externe requise)

Built-in 3V lithium battery Y92S-36; count data retained permanently after power loss

Battery service life: Environ. 6–8 years continuous display at ambient temperature; battery can be replaced individually when exhausted

No external operating power needed; only count/reset signals of AC/DC 24~240V can be connected

2.4 FV Free Voltage Input Specifications (Paramètres clés)

Directly compatible with AC contactors, contact relais, 220V photoelectric sensors and high-voltage proximity switches

High Level (H): AC/DC 24～240V (recognized as valid count signal)

Low Level (L): AC/DC 0～2.4V (no counting triggered when disconnected)

Courant d'entrée: Environ. 4.3mA at AC264V; environ. 2.9mA at DC24V

Compatible signals: Relay contacts, Capteurs CA, 220V transistor outputs

2.5 Certifications & Évaluations environnementales

Certifications: CE, UL508, ASC, EN61010-1

Température de fonctionnement: -10℃ à +55℃, no condensation allowed

Front panel protection rating: IP65 (when fitted with supplied waterproof gasket)

3. Définition du terminal & Wiring Diagram

4 terminals arranged left to right: 1, 2 (Count Input) | 3, 4 (Reset Input)

3.1 Standard Wiring for Relays / AC Contacts

Count signal: Parallel the normally open contacts of AC contactors or relays across terminals 1 et 2

External reset: Parallel reset switch or reset relay contacts across terminals 3 et 4

> Polarity-free, compatible with both AC and DC signals

3.2 Wiring for High-Voltage NPN/PNP Sensors

Connect sensor output directly to terminals 1 et 2, connect the 0V common line to the opposite terminal; compatible with AC/DC signals ranging from 24V to 220V

4. Comparison of Same Series Models (Model Selection Reference)

5. Scénarios d'application typiques
6. Cumulative production counting for assembly line equipment (direct connection of 220V AC photoelectric sensors without intermediate relays)
7. Operation cycle counting for fans and water pumps (driven by auxiliary contactors)
8. Total stroke recording for injection molding machines and stamping presses
9. Counting matched with legacy 220V-output sensors, eliminating the need for voltage conversion modules
10. Accessoires & Consumables
11. Replacement lithium battery: Y92S-36 3V
12. Flush mounting bracket: Y92F-34
13. Waterproof sealing gasket: Included as standard
14. Wire-wrapping terminal kit: Y92S-37 (converts screw terminals for wire-wrap wiring)
15. Précautions d'utilisation
16. Never apply input voltage exceeding AC/DC 240V, otherwise the internal input circuit will be damaged
17. This model supports low-speed counting at 20Hz; select H7EC-NV (1kHz high-speed model) for high-frequency pulses (>20 pulses per second)
18. Activate the key lock if the unit will be idle for a long period to avoid accidental reset; lock function controlled via DIP switch on unit side
19. The LCD display will disappear when the lithium battery is exhausted, but stored count data remains intact; display resumes after battery replacement
20. No relay output function; this unit only provides cumulative readout. Select H7CX series counters if output triggering upon preset value is required
21. Replacement Alternatives
22. Direct drop-in replacement with identical specs: H7EC-NFV-B (boîtier noir, fully identical electrical parameters)
23. Upgraded replacement for DC signal applications: H7EC-NV (supports 1kHz high-speed counting, suitable for 24V encoders)
24. Replacement with control output function: H7CX-A/N (with preset alarm output, requires external power supply)

OMRON H7EC-NFV Temperature Specifications

1. Température ambiante de fonctionnement (Running Temperature)

-10℃ ～ +55℃

Restriction: No ice formation or condensation permitted in surroundings

2. Température de stockage (Powered-off Storage)

-25℃ ～ +65℃

Ice and condensation are also prohibited under storage conditions

Supplementary Humidity Requirements

Operating humidity: 25%~85% HR, pas de condensation