≤100 ms Communication Refresh
Specified RS485 and Ethernet communication refresh time of ≤100 ms for applications requiring timely meter-side DC data updates.
DC02NC-S1 75 mV External-Shunt DC Energy Meter with RS485 and Ethernet
DC02NC-S1 is an external-shunt DC DIN-rail energy meter designed for DC metering applications such as DC charging piles, photovoltaic power stations and energy storage systems. It supports 75 mV shunt sampling with a range up to 2000 A through an external shunt, RS485 and Ethernet communication with Modbus RTU, DL/T 645-2007, HTTP-JSON and HTTP-OCMF protocols. Auxiliary power supply options: 24–36 V DC and 230 V AC.
External Shunt (75 mV)
DC 100–1000 V
Compact 3P DIN-Rail
Up to 75 mV:2000 A Shunt sampling range
Dual Power Options 24–36 V DC or 230 V AC
54 mm DIN-rail width (3P)
−40°C to +70°C Operating temperature
Product Highlights
Built for precise shunt-based DC metering
Class 1 DC Energy Accuracy
Class 1 energy accuracy in accordance with IEC 62053-41 supports reliable DC energy monitoring and billing applications.
RS485 + Ethernet Dual Communication
RS485 supports Modbus RTU and DL/T 645-2007 protocols. Ethernet supports HTTP-JSON and HTTP-OCMF protocols. Dual communication interfaces provide flexible system integration options.
Multi-Tariff and TOU
Supports 4 tariffs and 8 time periods by default. Daylight saving time is configurable. Automatic network time synchronization with temperature compensation.
External Shunt Flexibility
75 mV shunt sampling supports external shunts rated up to 2000 A, enabling flexible current-range configuration by selecting an appropriately rated external shunt for the application.
Line-Loss Compensation
Line-loss energy compensation function. Supports remote firmware upgrade for ongoing functional enhancements.
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Explore ApplicationTechnical Specifications
Technical Specifications
| Voltage connection | Direct connection |
| Rated voltage | DC 100 V – 1000 V |
| Voltage tolerance | 0.8 to 1.15 Un |
| Input impedance | 40 MΩ |
| Overload | Continuous: 1.2 Un max. |
| Pulse constant | 1000 imp/kWh |
| Auxiliary power supply | 24–36 V DC and 230 V AC options available |
| Auxiliary power consumption | ≤2 W |
| Current sampling | Shunt sampling: 75 mV; supports up to 75 mV:2000 A |
| Current connection | External shunt |
| Voltage accuracy | ±1 % |
| Current accuracy | ±1 % |
| Power accuracy | ±1 % |
| Energy accuracy | Class 1 (IEC 62053-41) |
| Communication interface | RS485 + Ethernet |
| RS485 protocol | Modbus RTU and DL/T 645-2007 |
| Ethernet protocol | HTTP-JSON and HTTP-OCMF |
| Communication type | Bidirectional |
| RS485 connection | 2-wire |
| Network connection | RJ45 |
| RS485 configuration | Modbus address (1 to 247) Baud rate: 9.6 / 19.2 / 38.4 / 57.6 / 76.8 / 115.2 kbps Parity: None / Odd / Even |
| Specified communication refresh time | ≤100 ms |
| LCD display | 8+2 dot-matrix, 1 s refresh, page navigation and setting buttons |
| LED indicators | Green: metering chip normal; Red/green alternating: communication abnormal; Steady red: overtemperature, overcurrent or magnetic field alarm |
| Metering function | 75 mV shunt sampling; measures DC power, current and voltage |
| Metering mode | Absolute-value metering and forward/reverse metering |
| Tariff function | 4 tariffs and 8 time periods; daylight saving time configurable |
| Self-diagnosis | Memory self-diagnosis |
| Event alarms | Overcurrent, overtemperature, magnetic field detection and low battery |
| Firmware upgrade | Local upgrade and remote upgrade |
| Clock | Automatic network time synchronization with temperature compensation |
| Other functions | Line-loss energy compensation |
| Operating temperature | −40°C to +70°C |
| IP rating | IP20; install in an IP54 outdoor or IP51 indoor enclosure |
| Protection class | Class II |
| Rated impulse withstand voltage | 9.6 kV |
| Installation method | DIN-rail mounting, 3P (54 mm) |
| Applicable standards | IEC 62052-11 / IEC 62052-31 / IEC 62053-41 / EN 50470-4 |
Structure & Dimensions
DC02NC-S1 Dimensions & Wiring
Dimensions
Wiring
FAQ
Product FAQ
What is DC02NC-S1?
DC02NC-S1 is an external-shunt DC DIN-rail energy meter with 75 mV shunt sampling, supporting a range up to 2000 A through an appropriately rated external shunt. It supports RS485 and Ethernet communication with Modbus RTU, DL/T 645-2007, HTTP-JSON and HTTP-OCMF protocols.
What is the difference between DC02NC-S1 and DC02ND series?
DC02NC-S1 uses an external shunt with 75 mV sampling, enabling flexible current-range configuration by selecting the appropriate shunt. The DC02ND series adopts an integrated shunt design combining the shunt and meter in a single unit. DC02NC-S1 is a 3P (54 mm) DIN-rail module; DC02ND is a 4.5P (80 mm) module.
What auxiliary power options are available for DC02NC-S1?
24–36 V DC and 230 V AC auxiliary power supply options are available.
What communication protocols does DC02NC-S1 support?
RS485 supports Modbus RTU and DL/T 645-2007. Ethernet supports HTTP-JSON and HTTP-OCMF protocols. Confirm the required protocol, register list and system settings before project deployment.
What tariff functions are available?
4 tariffs and 8 time periods by default. Daylight saving time is configurable. The meter supports automatic network time synchronization with temperature compensation.
What is the operating temperature range?
−40°C to +70°C. Suitable for outdoor installations including DC charging piles exposed to direct sunlight when installed in an appropriately rated enclosure.
Product Downloads
Product Datasheet Download
Datasheet
DC02NC-S1 Product Datasheet
Official DC02NC-S1 datasheet covering product overview, specifications, wiring and dimensions.
Download PDF- Product overview and features
- Technical specifications
- Wiring diagrams and dimensions
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