Overview
At a busy DC charging station, operators need accurate billing and real‑time monitoring. DJSF1352-RN‑2 measures voltage, current, power, and bi‑directional energy with 0.5% accuracy. It supports 8 tariffs (peak, flat, valley, deep valley), demand logging, and 12‑month history storage. The dot‑matrix LCD shows key data, while RS485 with Modbus/DLT645 enables remote integration. Ideal for EV chargers, telecom base stations, and solar PV sites. It reduces billing errors, optimizes energy use, and simplifies maintenance – all in a compact DIN‑rail design.
Highlight
High Accuracy Class 0.5
- Class 0.5 for V/I/P
- Voltage 0-100V / 0-1000V
- Shunt 0-75mV / Hall 0-5V
- Bi-directional energy
- Power direction indicator
Multi-Tariff & Demand
- 8 tariffs (T1~T8)
- Peak/Flat/Valley/Deep
- Forward/Reverse demand
- Monthly/historical
Data Logging
- Max/Min logging
- Demand recording
- 12-month history
- Data freeze
- Internal temp
Flexible Comm & Power
- RS485 Modbus/DLT645
- DL/T 698 optional
- Wide power 85-265V
- DC 12-48V optional
- -25℃~+65℃ operation
Focus Areas
Real-time energy metering with multi-tariff billing and remote monitoring.
Monitor energy consumption and status of DC power distribution in base stations, ensure reliable communication power.
Monitor output power and generation of PV modules with bidirectional metering.
Energy monitoring for DC motors, battery banks, electrolytic power supplies.
Function
| Measurement | Metering | Others |
| DC Voltage | Total Forward Active | 8 Tariffs (T1~T8) |
| DC Current | Total Reverse Active | Peak/Flat/Valley/Deep |
| DC Power | Tariff Energy (T1~T8) | Forward/Reverse Demand |
| Power Direction | Monthly Forward | 12-month History |
| Internal Temp | Monthly Reverse | Data Freeze |
| Four-Quadrant Reactive (opt) | Extremum Logging | |
| Energy Pulse Output |
Specification
| Parameter | Specification |
| Voltage Input | DC 0-100V or DC 0-1000V (Refer to wiring diagram) |
| Current Input | Shunt: 0-75mV; Hall Sensor: 0-5V, 0-200mA |
| Accuracy Class | Class 0.5 |
| Energy Metering | Forward/Reverse Active Energy, 8 Tariffs |
| Demand Recording | Forward/Reverse Active Demand |
| Historical Data | Last 12 months energy data |
| Pulse Output | 1 energy pulse, configurable constant (adaptive or manual) |
| Communication | RS485 |
| Protocols | Modbus-RTU, DL/T 645-2007, DL/T 698 |
| Display | Dot-matrix LCD with backlight |
| Power Supply | AC/DC 85-265V or DC12-48V (Code P1) |
| Power Consumption | ≤ 6W |
| Operating Temp. | -25℃ ～ +65℃ |
| Storage Temp. | -40℃ ～ +80℃ |
| Humidity | ≤95% RH, non-condensing, no corrosive gases |
| Altitude | ≤3000m |
| Insulation Resistance | ≥ 40MΩ |
| Dielectric Strength | Power/Signal/RS485: 4kV/1min; Other isolated circuits: 2kV/1min |
| MTBF | ≥50000h |
| Mounting | DIN35mm rail |
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FAQ
In the menu, go to “Input” -> “Neg.t” and set it to “on”. If not set, the voltage reading may appear negative.
It supports Modbus-RTU, DL/T 645-2007, and DL/T 698 protocols. The DL/T 645 meter ID defaults to the last 12 digits of the barcode and can be viewed or modified via the menu.
Yes. The meter stores the last 12 months of multi-tariff energy data, which can be viewed on the display via keypad or read via communication.
The meter defaults to adaptive mode (Pulse displays “auto”), where the pulse constant (1,10,100,1000,10000 imp/kWh) is automatically selected based on the current maximum power. Users can also manually set a value between 1 and 9999 via the menu.
When the input signal is very small (near zero), setting the voltage/current zero shielding value (Less.U / Less.I) avoids displaying minor fluctuations and improves reading stability. The range is 0-5.0% (based on rated value).
The meter operates at -25℃ to +65℃, storage -40℃ to +80℃, humidity ≤95% non-condensing. It is suitable for installation in outdoor cabinets with adequate protection.
It supports 8 tariffs (T1~T8), configurable as peak, flat, valley, deep valley, etc. Tariff schedules can be set via communication or keypad.
Navigate to the temperature display screen via keypad, or read via communication at register address 5 (Modbus) or identifier 04800008 (DL/T 645).
Summary
With high precision and advanced tariff capabilities, this meter excels in applications requiring detailed energy analysis and historical tracking. Its wide input range and multiple protocols ensure seamless integration into various DC systems.
