Installation Guide
Specifications:
- Product Name: SolaX Meter M3-40
- Phase: Three-phase
- Designed for: Electricity monitoring and power metering in PV= systems
- Size: Small
- Features: Easy to use, precise power metering
Product Usage Instructions
Meter Appearance and Description:
The M3-40 meter has the following key components:
- A: UL terminal for connecting to the L wires of the grid
- N: UN terminal for connecting to the N wire of the grid
- B Terminal: Current input terminal for connecting to the batch of CTs
- RS485 terminals A and B: For communication purposes
- Indicator D: Pulse indicator that flashes when the meter is working normally
- Function button E: Function indicator that flashes when adjusting the meter phase sequence
Scope of Delivery:
The package includes the M3-40 meter, RS485A and RS485B connectors, and relevant documentation.
Networking and Data Transmission:
The meter can be connected via RS485 cable or Wi-BR for data transmission within specified ranges.
Wiring Instructions:
- Connect L1, L2, L3, and N wires as per the provided networking diagrams.
- For wireless data transmission using Wi-BR, follow the diagram and ensure proper connections.
Compatible Inverters and Pin Definition:
Refer to the provided tables for compatible inverters and pin definitions. Ensure correct connections for single-phase inverters.
Cable Requirements:
Use recommended cables for voltage and CT connections with the specified sectional area and outer diameter.
Communication Cable Connection:
Select either terminal A or B to connect the communication cable for the meter.
Frequently Asked Questions (FAQ):
- Q: What is the maximum range for wireless data transmission using Wi-BR?
A: The meter can work with Wi-BR for data transmission within up to 200 meters horizontally and 20 meters vertically. - Q: Which terminals should be used for connecting voltage output cables in single-phase inverters?
A: For single-phase inverters, connect the voltage output cables to the L1 and N wire terminals.
SolaX Meter M3-40 Quick Installation Guide
Product Introduction
M3-40 is a three-phase meter designed for electricity monitoring and power metering in PV system and other scearios. It is small in size and easy to use, and offers precise power metering.
Table 1-1 Description of meter appearance
Scope of Delivery
3 Typical Networking Diagrams
Compatible Inverters and Pin Definition
Cable Requirements
Electrical Connection
Power Cable Connection
CT Connection
Communication Cable Connection
Select either terminal to connect communication cable for the meter. 
Installation
Technical Data
| Power grid type | 3P3W/3P4W |
| Rated voltage | 3*220/380V…3*240/415V |
| Operating voltage | 100 V~280 V |
| Current | *A/40 mA |
| Recommended CT specification | 100 A/40 mA; 200 A/40 mA; 400 A/40 mA;
600 A/40 mA; 1000 A/40 mA; |
| Power consumption | <1.2 W |
| Measurement accuracy class | Voltage and current: Class 0.5 Active power: Class 1 Reactive power: Class 2 |
| Resolution requirement | Active power: 0.1 W Frequency: 0.001 Hz |
| Frequency | 45 Hz~65 Hz |
| Frequency tolerance | 0.01 Hz |
| Operating temperature | -40°C to +70°C |
| Operating humidity | ≤95% , non-condensing |
| Operating altitude | <4000 m |
| Degree of protection | IP20 |
| Dimensions (W × H × D) | 45 mm × 100 mm × 65.5 mm |
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Documents / Resources
 |
SOLAX M3-40 Meter [pdf] Installation Guide M3-40 Meter, M3-40, Meter |
