オムロンセルフパワー8桁トータルカウンタ H7EC-NFV

モデルコードの内訳

H7EC-NFV

H7EC: シリーズ, 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:

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

2.1 機械式 & 取り付け

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

全体の寸法: 48(W) × 24(H) × 48.5(D) mm

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

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

2.2 Counting Performance

画面: 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 (duty ratio 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 電源 (Core Feature: セルフパワー, 外部電源は不要です)

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

Battery service life: 約. 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 (主要なパラメータ)

Directly compatible with AC contactors, リレー接点, 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)

入力電流: 約. 4.3mA at AC264V; 約. 2.9mA at DC24V

Compatible signals: Relay contacts, AC sensors, 220V transistor outputs

2.5 認証 & 環境評価

認証: CE, UL508, CSA, EN61010-1

動作温度: -10℃～+55℃, no condensation allowed

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

端子の定義 & 配線図

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 そして 2

External reset: Parallel reset switch or reset relay contacts across terminals 3 そして 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 そして 2, connect the 0V common line to the opposite terminal; compatible with AC/DC signals ranging from 24V to 220V

Comparison of Same Series Models (Model Selection Reference)

モデル	入力タイプ	Max Count Frequency	バックライト	代表的な用途
H7EC-NFV	Wide-range AC/DC 24~240V	20Hz	なし	220V relays, AC photoelectric sensors, high-voltage signals from legacy equipment
H7EC-NV	DC dedicated PNP/NPN 4.5~30V	Switchable 30Hz / 1kHz	Optional with -H suffix	24V DC sensors, encoders
H7EC-N	Voltage-free contact input (dry contact)	Switchable 30Hz / 1kHz	なし	Mechanical contacts, dry contacts, リミットスイッチ

典型的なアプリケーションシナリオ
Cumulative production counting for assembly line equipment (direct connection of 220V AC photoelectric sensors without intermediate relays)
Operation cycle counting for fans and water pumps (driven by auxiliary contactors)
Total stroke recording for injection molding machines and stamping presses
Counting matched with legacy 220V-output sensors, eliminating the need for voltage conversion modules
付属品 & Consumables
Replacement lithium battery: Y92S-36 3V
Flush mounting bracket: Y92F-34
Waterproof sealing gasket: Included as standard
Wire-wrapping terminal kit: Y92S-37 (converts screw terminals for wire-wrap wiring)
操作上の注意事項
Never apply input voltage exceeding AC/DC 240V, otherwise the internal input circuit will be damaged
This model supports low-speed counting at 20Hz; select H7EC-NV (1kHz high-speed model) for high-frequency pulses (>20 pulses per second)
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
The LCD display will disappear when the lithium battery is exhausted, but stored count data remains intact; display resumes after battery replacement
No relay output function; this unit only provides cumulative readout. Select H7CX series counters if output triggering upon preset value is required
Replacement Alternatives
Direct drop-in replacement with identical specs: H7EC-NFV-B (black housing, fully identical electrical parameters)
Upgraded replacement for DC signal applications: H7EC-NV (supports 1kHz high-speed counting, suitable for 24V encoders)
Replacement with control output function: H7CX-A/N (with preset alarm output, requires external power supply)