Circutor STM-S12 Instruction Manual
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Circutor STM-S12 Instruction Manual

Analyzer of currents and voltage of photovoltaic strings
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Analyzer of currents and
voltage of photovoltaic Strings
STM-S12, STM-S24, STM-H6,
STM-H10, STM-H20
INSTRUCTION MANUAL
(M329B01-03-21A)

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  • Page 1 Analyzer of currents and voltage of photovoltaic Strings STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 INSTRUCTION MANUAL (M329B01-03-21A)
  • Page 2 STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 Instruction Manual...

  • Page 3: Safety Precautions

    CIRCUTOR S�A�U� reserves the right to make modifications to the device or the unit specifications set out in this instruction manual without prior notice. CIRCUTOR S�A�U� on its web site, supplies its customers with the latest versions of the device specifi- cations and the most updated manuals.

  • Page 4: Table Of Contents

    4�- OPERATION ������������������������������������������������������������������������������������������������������������������������������������������������������������������� 19 4�1�- LEDs ����������������������������������������������������������������������������������������������������������������������������������������������������������������������� 19 4�2�- DIGITAL INPUTS ����������������������������������������������������������������������������������������������������������������������������������������������������� 19 4�3�- RTD TEMPERATURE PROBE INPUT �����������������������������������������������������������������������������������������������������������������������20 5�- RS-485 COMMUNICATIONS (STM-S12-RS485 AND STM-S24-RS485 MODELS) ������������������������������������������������������� 21 5�1�- CONNECTIONS ������������������������������������������������������������������������������������������������������������������������������������������������������� 21 5�2�- MODBUS PROTOCOL ����������������������������������������������������������������������������������������������������������������������������������������������22 5�3�- MODBUS COMMANDS �������������������������������������������������������������������������������������������������������������������������������������������22 5�3�1�- MEASUREMENT VARIABLES ���������������������������������������������������������������������������������������������������������������������������22...

  • Page 5: Revision Log

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 REVISION LOG Table 1: Revision log� Date Revision Description 11/21 M329B01-03-21A Initial release SYMBOLS Table 2: Symbols� Symbol Description In accordance with the relevant European directive. Device covered by European Directive 2012/19/EC. At the end of its useful life, do not leave the device in a household refuse bin.

  • Page 6: 1�- Verification Upon Reception

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 1.- VERIFICATION UPON RECEPTION Upon receipt of the device, check the following points: a) The device meets the specifications described in your order. b) The device has not suffered any damage during transport. c) Perform an external visual inspection of the device prior to switching it on.
  • Page 7 STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 specifies all the device models. Table 3 Table 3:List of models� Current measurement Communications Model LoRa ISM Band) No of Shunt Hall effect RS-485 channels 868 MHz 915 MHz STM-S12-485   STM-S12-F868  ...

  • Page 8: 3�- Installation Of The Device

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 3.- INSTALLATION OF THE DEVICE 3�1�- PRELIMINARY RECOMMENDATIONS In order to use the device safely, personnel operating it must follow the safety meas- ures that comply with the standards of the country where it is to be installed; operators must wear the required personal protective equipment and they must heed the various warnings indicated in this instruction manual.

  • Page 9: 3�2�- Installation

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 3�2�- INSTALLATION The STM is a device that has specifically been designed to be installed inside an electric cabinet or enclosed, with double insulation, fastened to a DIN rail. Only the measurement circuit can be removed from the enclosure.

  • Page 10: 3�3�- Device Terminals

    LED ED/DI 2 LED ED/DI 3 LED ED/DI 1 Figure 1: STM-S12 and STM-S24 terminals� Table 4:List of terminals: STM-S12 and STM-S24� Device terminals 1: 0, Power supply 26: Current output, channels 8 ... 5 27: CH4, Current input channel 4...

  • Page 11: 3�3�2�- Stm-H6

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 3�3�2�- STM-H6 21 20 19 LED Estado/State LED ED/DI 2 LED ED/DI 3 LED ED/DI 1 Figure 2: STM-H6 terminals� Table 5:List of terminals: STM-H6� Device terminals 1: I L1, Current measurement Channel 1 12: I2-, Digital input 2...

  • Page 12: 3�3�3�- Stm-H10

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 3�3�3�- STM-H10 25 24 23 LED Estado/State LED ED/DI 2 LED ED/DI 3 LED ED/DI 1 Figure 3: STM-H10 terminals� Table 6:List of terminals: STM-H10� Device terminals 1: I L1, Current measurement Channel 1 14: I1-, Digital input 1...

  • Page 13: 3�3�4�- Stm-H20

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 3�3�4�- STM-H20 35 34 33 LED Estado/State LED ED/DI 2 LED ED/DI 3 LED ED/DI 1 Figure 4: STM-H20 terminals� Table 7:List of terminals: STM-H20� Device terminals 1: I L1, Current measurement Channel 1 19: I L19, Current measurement Channel 19...

  • Page 14: 3�4�- Connection Diagrams

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 3�4�- CONNECTION DIAGRAMS 3�4�1�- STM-S12 Alimentación Auxiliar Power Supply Media de Tensión Voltage Measurement Canal / Channel 12 Canal / Channel 11 Canal / Channel 9 ... 12 Canal / Channel 10 Canal / Channel 9...

  • Page 15: 3�4�2�- Stm-S24

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 3�4�2�- STM-S24 Alimentación Auxiliar Power Supply Media de Tensión Voltage Measurement Canal / Channel 21 ... 24 Canal / Channel 24 Canal / Channel 12 Canal / Channel 23 Canal / Channel 11 Canal / Channel 22 Canal / Channel 9 ...

  • Page 16: 3�4�3�- Stm-H6

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 3�4�3�- STM-H6 Alimentación Auxiliar Power Supply Media de Tensión Voltage Measurement Canal / Channel 6 Canal / Channel 5 Canal / Channel 4 Canal / Channel 3 Canal / Channel 2 Canal / Channel 1 Figure 7: Connection diagram STM-H6�...

  • Page 17: 3�4�4�- Stm-H10

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 3�4�4�- STM-H10 Alimentación Auxiliar Power Supply Media de Tensión Voltage Measurement Canal / Channel 10 Canal / Channel 9 Canal / Channel 8 Canal / Channel 7 Canal / Channel 6 Canal / Channel 5...

  • Page 18: 3�4�5�- Stm-H20

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 3�4�5�- STM-H20 Alimentación Auxiliar Power Supply Media de Tensión Voltage Measurement Canal / Channel 20 Canal / Channel 10 Canal / Channel 9 Canal / Channel 19 Canal / Channel 18 Canal / Channel 8...

  • Page 19: 4�- Operation

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 4.- OPERATION 4�1�- LEDs LED Estado/State LED ED/DI 2 LED ED/DI 3 LED ED/DI 1 Figure 10: LEDs� Table 8: LEDs� LEDs Description On: Indicates that the device is powered and without errors. State Flashing slow: Indicates that the current is running in reverse through one of the channels.

  • Page 20: 4�3�- Rtd Temperature Probe Input

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 4�3�- RTD TEMPERATURE PROBE INPUT The devices have an input for connecting a RTD temperature probe; specifically, a Pt100 probe can be connected (Terminals 47 ... 49 in Terminals 19 ... 21 in Terminals 23 ... 25 in...

  • Page 21: 5�- Rs-485 Communications (Stm-S12-Rs485 And Stm-S24-Rs485 Models)

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 5.- RS-485 COMMUNICATIONS (STM-S12-RS485 AND STM-S24-RS485 MODELS) The SMT-S12-RS485 and SMT-S24-RS485 have an RS-485 communications port, with communica- tions protocols: MODBUS RTU ®. 5�1�- CONNECTIONS The RS-485 cable must be wired using twisted pair cable with mesh shield (minimum 3 wires), with a maximum distance of 1200 meters between the SMT-Sxx-485 and the master unit.

  • Page 22: 5�2�- Modbus Protocol

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 5�2�- MODBUS PROTOCOL Within the Modbus protocol, the SMT-Sxx-485 uses the RTU (Remote Terminal Unit) mode. The Modbus functions implemented in the device are as follows: Function 0x02: Reads the status of an input Function 0x03 and 0x04: Reading integer registers.
  • Page 23 STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 Table 11 (Continued): Modbus Memory Map: Instant current measurement of channels� Variable Address Valid data range Units Instantaneous current channel 7 100A 0 ... 10000 A x100 Instantaneous current channel 8 100B 0 ... 10000...
  • Page 24 STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 Table 12 (Continued): Modbus Memory Map: Instantaneous power measurement of channels� Variable Address Valid data range Units Instantaneous power channel 23 1272 0 ... 150 Instantaneous power channel 24 1273 0 ... 150 Table 13: Modbus Memory Map: Average power measurement�...

  • Page 25: 5�3�2�- Memory Map In Blocks

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 5�3�2�- MEMORY MAP IN BLOCKS To simplify readout of a dataset in a single instruction, a set of consecutive memory positions has been established, which we will call blocks. 2 blocks have been used:  Block 1: comprising Digital Input status variables, negative current and current deviation Alarms.
  • Page 26 STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 Table 15 (Continued): Modbus Memory Map: Block 1 Variable Address Valid data range Without use 05F8 Without use 05F9 Without use 05FA Without use 05FB Without use 05FC Without use 05FD Without use 05FE Without use...

  • Page 27: 5�3�3� Configuration Settings

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 For the variables of Block 2, Function 0x04 is implemented. Table 16: Modbus Memory Map: Block 2� Block 2 Variable Address Valid data range Units Temperature of the STM device 3520 -200... 1000 ºC ºC x 10...
  • Page 28 STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 Table 18: Modbus Memory Map: Configuration parameters (Table 2)� Configuration parameters (Tabla 2) Configuration variable Address Valid data range Default value Modbus LoRa Address 36B7 1 ... 254 ID address 36B8 ... 36BF 7 integers (Serial No) + 1 Integer (Modbus address)

  • Page 29: 6�- Wireless Communications (Stm-Xxx-Fxxx Models)

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 6.- WIRELESS COMMUNICATIONS (STM-xxx-Fxxx Models) The STM-xxx-Fxxx model has a built-in gateway for converting data between the RS-485 physical environment and the LoRa long-range wireless network. 6�1�- USAGE ENVIRONMENT AND HEALTH Like other radio devices, wireless communications emit electromagnetic RF energy.
  • Page 30 STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 RS-485 LoRa™ LoRa™ LoRa™ LoRa™ Bus 1 Bus 2 Bus 3 Figure 12: Example of LoRa connection� Up to 32 end devices can be connected to each communications bus. Communications between the LoRa master and slave devices are completely transparent, allowing for a simple installation where you only need to check the transmission time between messages and the timeout time from the application master.
  • Page 31 STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 Table 20 (Continued): Transmission-Reception Modes� Mode Speed Description 976.56 bps 1171.88 bps 1953.13 bps 2148.44 bps 3515.63 bps 7031.25 bps 12500 bps 21875 bps Minimum distance: , Maximum speed: Note: Check the guide "Guide to implementing LoRa-Modbus communications in the STM"...

  • Page 32: 7�- Technical Features

    Min� voltage measurement (Vstart) - 25 V Max� consumption of the voltage input 0.625 mA Installation category CAT II 1500 V Current measurement circuit (STM-S12 and STM-S24 Models) STM-S12 STM-S24 Channels Current measurement margin 0.1 ... 45 A 0.1 ... 30 A Min�...
  • Page 33 STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 Wireless communications Band 2.4 GHz RS-485 communications (STM-S12-485 and STM-S24-485 Models) Protocol Modbus RTU Baud rate 9600 - 19200 - 38400 - 57600 - 115200 Data bits Parity without Stop bits LoRa communications (STM-Sxx-Fxxx, STM-H6, STM-H10 and STM-H20 Models)
  • Page 34 STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 (Continuation) Mechanical features (STM-H6 Model) Enclosure Self-extinguishing V0 plastic Attachment DIN rail Mechanical features (STM-H10 Model) Terminals 1...10 < 8.4 mm 11, 12 0.75 ... 16 mm 18 mm 13 ... 21, 23 ... 25 0.2 ...
  • Page 35 STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 337.5 Figure 13: SMT-S12-485 Dimensions� Figure 14: SMT-S12-Fxxx Dimensions� 337.5 Figure 15: SMT-S24-485 Dimensions� 337.5 Figure 16: SMT-S24-Fxxx Dimensions� Instruction Manual...
  • Page 36 STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 34.8 125.6 Figure 17: SMT-H6-Fxxx Dimensions� 361.3 34.8 125.6 Figure 18: SMT-H10-Fxxx Dimensions� 361.3 34.8 125.6 Figure 19: SMT-H20-Fxxx Dimensions� Instruction Manual...
  • Page 37 STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 Instruction Manual...

  • Page 38: 8�- Maintenance And Technical Service

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 8.- MAINTENANCE AND TECHNICAL SERVICE In the case of any query in relation to device operation or malfunction, please contact the CIRCUTOR S�A�U� Technical Support Service. Technical Assistance Service Vial Sant Jordi, s/n, 08232 - Viladecavalls (Barcelona) Tel: 902 449 459 (Spain) / +34 937 452 919 (outside of Spain) email: sat@circutor.com...

  • Page 39: 10�- Eu Declaration Of Conformity

    STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 10.- EU DECLARATION OF CONFORMITY Instruction Manual...
  • Page 40 STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 Instruction Manual...
  • Page 41 STM-S12, STM-S24, STM-H6, STM-H10, STM-H20 Instruction Manual...
  • Page 42 CIRCUTOR S.A.U. Vial Sant Jordi, s/n 08232 - Viladecavalls (Barcelona) Tel: (+34) 93 745 29 00 - Fax: (+34) 93 745 29 14 www.circutor.com central@circutor.com...

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