NSM8-20 Solar PV String Digital Monitoring System

NSM8 Solar PV String Digital Monitoring System

NSM8 Solar PV string level monitoring device is compatible with PV string voltages up to 1500VDC.

It can monitor 8, 12, 16, 20, and 24 strings and measure up to 20A per string.

  • Input channels: 8, 12, 16, 20, 24 strings
  • Operating voltage: DC50V~1500V
  • Rated current: 0~20A
  • Power consumption: ＜5W
  • Temperature measuring range: -40℃~+80℃
  • Communicate interface: RS485/ModBus-RTU protocol
  • Operating temperature: -30℃~+70℃

 

 

Product Overview

NSM8 Solar PV String Level Monitoring monitors current and voltage at the string level inside a combiner box. This device is compatible with PV string voltages up to 1500VDC. It can monitor 8, 12, 16, 20, and 24 strings and measure up to 20A per string.

The NSM8 Solar PV String Level Monitoring Device can be directly powered by the solar array while providing reliable information and data. It adopts an RS485 interface and supports the MODBUS protocol.

 

Technical parameters

Technical Data

Model NMS8-8 NSM8-12 NSM8-16 NSM8-20 NSM8-24
Input
Input channels 8 12 16 20 24
DC operating voltage DC50V~DC1500V
PV string current input 0~20A
Power consumption ＜5W
Accuracy 1%
Response time 1S
Temperature measuring range -40℃~+80℃
Temperature coefficient 250PPM/℃
Auxiliary power input voltage DC5V±5%
Industrial frequency withstand voltage 2.5kV
Interface
Communicate interface RS485/ModBus-RTU protocol
Baud rate 1200、2400、4800、9600、19200、38400、57600、115200bps
Communication medium 1.5mm² screen twisted pair, communication distance 1000 meters, Max128 nodes per loop
Operating Environment
Operating temperature -30℃~+70℃
Storage temperature -40℃~+80℃
Relative humidity 0%~95%
Altitude ≤3000m
Insulation resistance ≥100MΩ
Protection degree IP30
Dimensions(D*W*H) 210×30×67.3 274×30×67.3 346×30×67.3 418×30×67.3 490×30×67.3

Wiring Diagram

Dimensions

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