MN-L90C
This Power Line Communication (PLC) module, which extends PLC technology from low-voltage electricity metering to IoT communication fields, including smart meters, energy management systems, new energy charging piles, and PV inverter systems (e.g., smart energy managers in three-phase PV inverters, anti-backflow controllers, and centralized box-type transformers).
Reference Standards
- China Southern Power Grid (CSG) Technical Specification for Three-Phase Smart Energy Meters
- CSG Interface Protocol for Local Communication Modules of Metering Automation Terminals
- DL/T 645-2007 Multifunctional Energy Meter Communication Protocol
- CSG Low-Voltage Power Line Broadband Carrier Communication Protocol (Parts 1-6) Q/CSG 1204111-2022
- CSG Technical Manual for Advanced Applications of Low-Voltage Power Line Broadband Carrier
- State Grid Corporation of China (SGCC) Technical Specification for Power User Electric Energy Data Acquisition System: Communication Unit Q/GDW 1374.3-2013
- SGCC Technical Specification for Power User Electric Energy Data Acquisition System: Communication Unit Series Q/GDW 374.3-2009
Product Advantage
- Fully compliant with State Grid interoperability standards, compatible with Southern Grid and Guangdong protocols.
- Three-phase three-wire power supply, wide voltage range support (320-1040V).
- Physical layer peak rate: 6Mbit/s; Application layer peak rate: 2Mbit/s
- OFDM technology with BPSK/QPSK/8QAM/16QAM modulation schemes.
- Integrated high-performance ARM CPU (up to 266MHz) for multi-service smart grid applications.
- Supports FEC and CRC functions with robust noise suppression and error correction.
- Operating frequency band: 0.7-12MHz (configurable band segmentation)
- Operating voltage: DC 12V±1V
- Power consumption: <0.8W (standby), <1.8W (active)
Operating temperature: -25°C to +75°C
Storage/operating humidity: ≤95% (non-condensing)
- Product Specifications
Temperature -25°C to +75°C Humidity (RH) ≤95% (non-condensing) Atmospheric Pressure 63.0KPa to 108.3KPa (Altitude below 5000m) Power Supply DC 12V±1V Power Consumption Standby <0.8W, Active <1.8W Voltage Range 320V - 1040V Carrier Method PLC Frequency Band 0.7MHz - 12MHz (configurable band segmentation) Modulation Method OFDM Port Type RS485 (auto-adaptive) Baud Rate 9600bps (supports 1200-115200bps) Data Bits 8 Stop Bits 1 Parity None Port Type TTL (HDR1X3) Baud Rate 115200bps Data Bits 8 Stop Bits 1 Parity Even Whitelist Enabled by default Transmit Power Adjustment Configurable via AT commands Logical Topology Recognition Displays real-time node information and network hierarchy, monitors communication quality, and assists in fault diagnosis Asset Management Supports centralized queries of MAC addresses, software/hardware versions, and asset IDs Remote Firmware Update Enables wireless software version upgrades Insulation Resistance Power circuit to ground: >20MΩ Dielectric Strength Power circuit to ground: 4KV/1min ESD Immunity Contact discharge: 6KV; Air discharge: 15KV Surge Immunity Test Power circuit: ±6KV Power LED (Red) Steady on when powered (abnormal if blinking/off) Status LED (Red) Blinks during data transmission Phase A LED (Blue) Illuminates when local unit transmits via Phase A Phase B LED (Blue) Illuminates when local unit transmits via Phase B Phase C LED (Blue) Illuminates when local unit transmits via Phase C PCBA Size (L*W*H) 125mm × 75mm × 25mm
Module Dimensions and Mounting Hole Diagram
Interface Definitions
1.High-Power Interface Specifications
- Schematic Diagram
Port P1 (VH3.96-3A2T)
- High-Voltage Interface Pin Definition
| Pin No. | Pin Name | Description | Voltage Range | Remarks |
| 1 | A | Phase A in 3-phase 3-wire power line carrier | 320V ~ 1040V |
/ |
| 2 | B | Phase B in 3-phase 3-wire power line carrier | ||
| 3 | C | Phase C in 3-phase 3-wire power line carrier |
Low-Power Interface Specifications
- Schematic Diagram
Port P2 (XH2.54-8P)
- Low-Voltage Interface Pin Definition
| Pin No. | Pin Name | Description | Default Level | Remarks |
| 1-2 | 485_A | RS485 Communication A | 3.3V (RS485) | Auto-adaptive |
| 3-4 | 485_B | RS485 Communication B | 3.3V (RS485) | |
| 5 | GND | Power Supply Ground | DGND | Communication power supply (DC 12-16V, min. 4W output) |
| 6 | 12V | 12V Power Supply | 12V | |
| 7 | RST | Module Hardware Reset | Low Level | 3.3V TTL Level |
| 8 | SET | Reserved/Spare | Low Level |
