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STRING MONITORING UNIT (SMU)

Availability: In stock

The string monitoring unit (SMU) precisely records all electrical data of a PV generator in real time regardless of the inverter in use and can monitor up to four status-signaling contacts. This ensures the continuous monitoring of the direct current side of PV systems. Data can be recorded smoothly with the Modbus RTU protocol and the provided RS485 interface. The SMU is compatible with meteocontrol data loggers.


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Availability: In stock

The string monitoring unit (SMU) precisely records all electrical data of a PV generator in real time regardless of the inverter in use and can monitor up to four status-signaling contacts. This ensures the continuous monitoring of the direct current side of PV systems. Data can be recorded smoothly with the Modbus RTU protocol and the provided RS485 interface. The SMU is compatible with meteocontrol data loggers.

Click here for DATASHEET of 421.925
Click here for DATASHEET of 421.926
Click here for DATASHEET of 421.927
Click here for DATASHEET of 421.928
  • Measurement of 8 to 24 individual strings, 16 to 48 strings with double assignment
  • Error recognition in the PV generator on the string level
  • Precise, real-time measured value recording
  • Compatible with system voltage levels of up to 1,500 V DC
  • Manufacturer-independent, open Modbus RTU protocol
  • Comprehensive status monitoring
  • Preconfiguration for easy connectivity to the data loggers WEB’log and blue’Log X-Series
 

String monitoring unit 0825
(SMU 0825)

String monitoring unit 1225
(SMU 1225)

String monitoring unit 1625
(SMU 1625)

String monitoring unit 2422
(SMU 2422)

Current measurement

Number of measuring channels

8

12

16

24

Number of strings in double assignment

16

24

32

48

Measuring range

0 ... 25 A at a max. of 1,500 V DC

0 ... 22 A at a max. of 1,500 V DC

Measuring accuracy

≤ 0.5 %

Voltage measurement

Measuring range

0 ... 1,500 V DC

Measuring accuracy

< 1,5 %

Temperature measurement

Measurement area ambient / module temperature (PT100)1

- 22 °C ... 83 °C

  

Measurement area circuit-board / interior cabinet temperature

0 °C ... 100 °C

Digital input

4

Analog input

2 (0 ... 10 V, 0 ... 20 mA)

Supply voltage

24 V DC

Communication

RS-485, Modbus RTU

  • Highly flexible system design
  • Detection of even small yield losses – assurance of yields on the string level
  • Cost-efficient monitoring of the direct current side of your PV system
  • Future-proof hardware also for system designs with 1,500 V DC
  • Effortless connection to any SPS or data logger
  • Time and cost savings through simplified commissioning process

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