Overview
The ADL200-NK is a single-phase prepayment energy meter designed for accurate active energy measurement in residential and commercial applications.
It integrates prepayment control and RS485 communication (optional WiFi) to enable remote management and real-time monitoring.
With comprehensive measurement of voltage, current, power, and energy, it supports multi-tariff (optional) and historical data logging.
Ideal for modern electricity management systems, it enhances revenue security and operational efficiency.
Highlight
Prepayment & Control
- Accurate balance management
- Configurable alarm thresholds (2 levels)
- Overdraft and forced control support
- Real-time status monitoring
- Remote trip/close control
High Accuracy Measurement
- Bidirectional active energy (Class B)
- Voltage/current accuracy ±0.2%
- Reactive/apparent power measurement
- Power factor and frequency
- Multi-tariff (4 rates, 14 periods)
Flexible Communication
- RS485 Modbus RTU (1200~19200bps)
- Optional WiFi connectivity
- Up to 247 addresses
- Supports parity: none, odd, even
- Easy integration with SCADA/EMS
- RS485 Modbus RTU (1200~19200bps)
Compact & Reliable
- DIN rail mounting, space-saving
- Wide operating temp -25~55℃
- Pulse output (1600 imp/kWh)
- Password-protected programming
- Long service life, low maintenance
Function
| Measurement | Extended Functions |
| Energy Measurement | Measures forward/reverse active energy; accuracy Class B. |
| Electrical Parameters | Voltage, current, active/reactive/apparent power, power factor, frequency. |
| Display & Operation | 8-digit LCD, 3-button navigation, programmable parameters. |
| Communication | RS485 Modbus RTU (optional WiFi), supports multiple baud rates and parity. |
| Prepayment Control | Balance management, alarms (2 levels), overdraft, forced control. |
| Multi-tariff (optional) | 4 time zones, 4 tariffs, 14 daily periods. |
| Historical Data | Freeze data, purchase records, date/time. |
| Pulse Output | Active energy pulse (1600 imp/kWh). |
Specification
| Parameter | Value |
| Reference Voltage | 220V |
| Current Range | 0.4-1(60)A |
| Active Energy Accuracy | Class B (error ±0.5%) |
| Voltage/Current Accuracy | ±0.2% |
| Power Measurement Accuracy | ±0.5% |
| Frequency Range | 45~65Hz (±0.2%) |
| Power Consumption (Voltage circuit) | <10VA |
| Power Consumption (Current circuit) | <4VA per phase |
| Clock Accuracy | ≤0.5s/day (with -F option) |
| Pulse Output | 1 channel, 1600 imp/kWh, width 80±20ms |
| Communication Interface | RS485 Modbus RTU (optional WiFi) |
| Baud Rate | 1200,2400,4800,9600,19200 bps |
| Communication Address | 1~247 (Modbus) |
| Operating Temperature | -25°C ~ +55°C |
| Storage Temperature | -40°C ~ +70°C |
| Relative Humidity | ≤95% (non-condensing) |
| Altitude | <2000m |
| Mounting | DIN rail (35mm) |
| Terminal Torque | ≤2 N·m |
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FAQ
The ADL200-NK is line-powered directly from the 220V reference voltage, requiring no external power supply or battery, ensuring long-term maintenance-free operation.
Data and parameters can be accessed via the RS485 interface using Modbus RTU protocol. An optional WiFi module enables wireless communication. The data can be integrated into third-party systems or Acrel’s backend software.
The meter deducts cost in real time. When the balance falls below alarm threshold 1, a warning is issued; below alarm threshold 2, the meter can automatically trip. After recharging, the balance is restored and the meter automatically closes. Overdraft amount can be set to avoid frequent tripping.
Alarm thresholds (alarm1 and alarm2) can be written remotely via Modbus communication or programmed locally via buttons. The range is 0~9999.99 RMB (corresponding to 0~999999 with factor 0.01).
Yes. Forced control word (address 0057H) can be written via Modbus to perform remote close or trip. The trip/close control word (address 0058H) is also available for independent control.
With the -F option, it supports 4 time zones, 4 tariffs (peak, flat, valley, critical peak), and 14 daily periods. Tariff schedules and rates can be set via communication interface or button programming.
It adopts standard 35mm DIN rail mounting with simple wiring. Power outage is required during installation for safety, though the meter supports pluggable terminals. Professional electrician installation is recommended.
Operating temperature is -25°C to +55°C, storage temperature -40°C to +70°C, relative humidity ≤95% (non-condensing), suitable for most indoor and outdoor environments.
They can be set via the programming menu using buttons (Addr, bAUd, PARI) or modified via Modbus registers (address 0360H, 0361H). Default baud rate is 9600, no parity.
The standard Modbus RTU protocol allows easy integration with various PLCs, SCADA, Energy Management Systems (EMS), and Acrel cloud platform. Paired with Acrel prepayment management system, it provides a complete prepayment solution.
Summary
The ADL200-NK prepayment meter combines accurate energy measurement with flexible prepayment control and communication capabilities, enabling efficient revenue management and remote monitoring. Its compact design, wide operating range, and multiple tariff support make it an ideal solution for residential, commercial, and industrial applications seeking reliable and intelligent energy management. By integrating seamlessly with existing systems, it enhances operational efficiency and reduces non-technical losses.
