Sma SSM-U-1615 User Manual

OperatingManualSMAString-Monitor SSM-U-1615 / SSM-U-2415 / SSM-U-3215SSMUXX15-BE-en-10 | Version 1.0ENGLISH

Danger to life from electric shock if the product is not lockedIf the product is not locked, unauthorized persons will have access to live components

Property damage due to dust intrusion and moisture penetrationDust or moisture intrusion can damage the product and impair its functionality.• Do not

3 Scope of DeliveryCheck the scope of delivery for completeness and any externally visible damage. Contact yourdistributor if the scope of delivery is

4 Product Overview4.1 SMAString-MonitorThe SMAString‑Monitor is a PV array junction box to which several strings can be connected inparallel. The SM

4.2 External View of the DC SubdistributionFigure 3: External view of the DC subdistributionPosition DesignationA Lock cylinderB Wall bracket lugsC Ve

4.3 Components of the DC SubdistributionFigure 4: Components of the DC subdistributionPosition DesignationA DC overvoltage protectionB DC Load-Break S

Position DesignationD Rotary handle of the DC load-break switchE Electronic assemblyProtective coversFigure 5: Position of the protective coversPositi

4.4 Terminals on the Electronic Assembly1 2 3 4 5 6 7 8 9 1112 14ABCDEFGHKLMNOPQIFigure 6: Terminals on the electronic assemblyPosition Designation Ex

Position Designation ExplanationO ‒ Slot for the power supply assembly for external 230VACsupply voltage to the SMAString-Monitor via the inverterP

4.6 Symbols on the ProductThe following gives an explanation of all the symbols found on the SMAString-Monitor and on thetype label.Symbol Designatio

Legal ProvisionsThe information contained in these documents is property of SMA Solar Technology AG. Anypublication, whether in whole or in part, requ

4.7 LEDs on the Electronic AssemblyL‒L+LK/ACTSPEEDLK/ACTSPEEDUPDERRALPWRCOMABCDEFigure 7: LEDs on the electronic assemblyPosition Designation Color Ex

5 Mounting5.1 Selecting the Mounting LocationFire hazard due to wrong choice of mounting locationDespite careful construction, electrical devices can

Dimensions and anchoring points:Figure 8: Dimensions and anchoring pointsPosition ExplanationA 630.00mmB 600.00mmC 573.00mm (space between anchorin

Observe minimum clearances:Figure 9: Minimum clearancesPosition ExplanationA 200mmB 650mmC 800mmD 150mmE 650mm5.2 Mounting the SMAString-Monitor

– 4 screw anchors if necessary. Take the wall properties into account when selecting thescrew anchors.• For mounting the DC subdistribution on the PV

6 Installation6.1 Overview of the Connection Area of the SMA String-MonitorView from BelowFigure 10: View of the SMAString-Monitor from belowPosition

Interior ViewFigure 11: Interior view of the DC subdistributionPosition DesignationA Busbar for connecting the main cables DC+B Busbar for connecting

Position DesignationE Electronic assemblyF Strain relief for the cables6.2 Grounding6.2.1 Information on GroundingThe parts to be grounded can be conn

4. Release the screw on the connecting terminal plate, insert the grounding cable and fasten thescrew (torque: 3.2Nm).5. Ensure that the grounding ca

Connecting the DC main cables to the busbar using terminal lugs(see Section6.3.3, page29)• DC main cable 70mm2 to 400mm2 made of aluminum or coppe

Table of Contents1 Information on this Document ... 61.1 Validity...

Assembly of the Connection with One Terminal LugFigure 12: Assembly of the Connection with One Terminal LugPosition DesignationA Screw M12B WasherC Ti

Assembly of the Connection with Two Terminal LugsPosition DesignationA Screw M12B WasherC Tin-plated copper busbarD Fender washerE Spring washerF Nut

7. Connect the DC main cables to the busbars for the DC main cables (torque: 60 Nm) (seeSection6.1, page25). To do this, use only the fastening mate

6.3.4.2 Installing the Box Terminal on the BusbarAssembly of the Connection with One Box TerminalFigure 13: Assembly of the Connection with One Box Te

6.3.4.3 Connecting Copper Cables to V-Box TerminalRisk of fire from contact failureGrease on the set screw can result in failure to reach the prescrib

6.3.4.4 Connecting Aluminum Cables to V Box TerminalUpon contact with oxygen, an oxide film forms on aluminum surfaces. This oxide film increasestrans

10. Unscrew the set screw of the box terminal with an Allen key (AF 6).11. Connect one DC main cable to each box terminal. To do this, insert the cond

System topology for Ethernet communication:Figure 14: System topology for Ethernet communication with SMAString-Monitor (example)Position Designation

• To connect the communication input, connect all eight conductors of the Ethernet cable tothe electronic assembly at terminal X9 (see Section4.4, pa

6.5 Connection of Sensors6.5.1 Connecting Temperature SensorsYou can connect two temperature sensors, e.g., ambient temperature sensor or module tempe

6.3.1 Safety during Installation of the DC Main Cables... 286.3.2 Options for Installation of the DC Main Cables ...

☐ Maximum cable length: 30m☐ External cable diameter: 3.2mm to 6.5mmAdditionally required material (not included in the scope of delivery):☐ 1 irra

Procedure:1. Connect the cable to the remote terminal (see manufacturer manual). Trim the unneededinsulated conductors up to the cable shield and note

6.8 Installation of the String Cables6.8.1 Requirements for Installation of the String CablesRequirement:☐ Apart from installation of the string cable

Danger to life due to electric arcAn electric arc may occur when plugging or removing the DC connectors or the inline fuseconnectors under load and in

3. On the DC subdistribution, remove the protection foil from the cable harnesses for connectionof the PV strings.4. If inline fuse connectors are use

7 Commissioning the DC SubdistributionThe commissioning report of the inverter must be completed during commissioning.Requirements:☐ The DC load-break

8 Disconnecting and Reconnecting8.1 Safety When Disconnecting and Reconnecting VoltageSourcesDanger to life from electric shock due to live voltageHig

8.2 Disconnecting the DC Subdistribution1. Disconnect the inverter DC side from voltage sources and secure against inadvertentreconnection (see invert

3. Ensure that there is no ground fault in the PV array (see service manual at www.SMA-Solar.com).4. Remount the protective covers on the DC subdistri

9 Troubleshooting9.1 LED States9.1.1 Status LEDs of the SMAString-MonitorAn overview of the LEDs can be found in Section4.7, page20.LED Status Caus

10.2.1 Notes on Maintenance Work... 5310.2.2 Maintenance Work Every 24 Months...

LED Status Cause and corrective measureCOM (yellow) Off* At present no data exchange in progress.On At present data exchange in progress.flashing At p

9.2 Performing an UpdateSMAString-Monitor updates are carried out via the SMA inverter (see inverter manual).9 TroubleshootingSMA Solar Technology AG

10 Maintenance10.1 Safety during MaintenanceDanger to life from electric shock due to live voltageHigh voltages are present in the live components of

Damage to electronic components due to electrostatic dischargeElectrostatic discharge can damage or destroy electronic components.• Observe the ESD sa

Maintenance under voltage-free conditionsTask SeeChecking the protective covers Section10.3.2, page55Performing the visual inspection Section10.3.3

10.3.2 Checking the Protective CoversDanger to life from electric shock due to live voltageHigh voltages are present in the live components of the DC

4. Check the enclosure of the DC subdistribution for defects or leaks, e.g. soiled or damagedareas.Remove any soiling with a non-abrasive damp cloth.I

Procedure:1. Check whether the seals around the edges of the DC subdistribution door show any damage.If seals are damaged, contact Service (see Sectio

Position SMA order number DesignationE 86-104500.03 Reference designation labelF 86-116100.01 Symbol "Hot components"* Includes the three gi

10.3.10 Checking the Inline Fuse ConnectorsDanger to life due to electric arcAn electric arc may occur when plugging or removing the DC connectors or

1 Information on this Document1.1 ValidityThis document is valid for the SMAString-Monitor of the following device types from productionversion A1:•

11 Decommissioning11.1 Decommissioning the DC SubdistributionDanger to life from electric shock due to live voltageHigh voltages are present in the li

Risk of injury when lifting the DC sub-distribution, or if it is droppedThere is risk of injury if the DC sub-distribution is lifted incorrectly or dr

12 Periodic Actions12.1 Inserting the Cables12.1.1 Leading Cables through Enclosure Opening withMembraneProperty damage due to dust intrusion and mois

• Cable gland for DC main cable: 7.5Nm• Cable gland for external voltage supply: 4.0Nm• Cable gland for external functional grounding of the AC Pigg

Disassembling the protective covers1. Disconnect the DC subdistribution from voltage sources (see Section8.2, page47)2. To disassemble the bottom pr

13 Technical DataEnclosureOutdoor installation ShadedMaterial Glass-fiber reinforced plasticCombustion properties Self-extinguishing, halogen-freeIP d

Mechanical DataWeight of pole mounting bracket* 2.1kgMinimum clearance between enclosure andfloor if inline fuse connectors are installed under-neath

Current MeasurementCurrent measurement range −2.5 A to +17.5 AMaximum error at +25°C* ±0.5%Maximum error in temperature range* ±1.0%* based on the end

Connecting the String Cable to the DC Connector*Cable type PV 1-FConductor cross-section at 6mm2 DC connector 2.5mm2 to6.0mm2Cable diameter at 6m

Interfaces for Temperature MeasurementCable gland Multiple feed-throughSealing range of cable gland 3.2mm to 6.5mm* based on the measurement range e

1.5 TypographiesTypographies Use Examplebold• Display messages• Elements on a userinterface• Terminals• Slots• Elements to be selected• Elements to be

Analog Current InputMaximum error in temperature range* ±2.0%Terminal Spring-cage terminal with actuation lever on theelectronic assemblyMaximum cable

Data Transmission Optical Fiber*Data interface Modbus (TCP)Local area network (LAN) EthernetDirect connection multimode optical fiber cableto optical

14 AccessoriesYou will find the accessories for your product in the following overview. If required, these can beordered from SMA Solar Technology AG

Designation Brief description SMA order numberAlarm Contact Kit for SMAString-MonitorsAlarm contact set 1NO (makecontact) for the switch state indi-c

15 ContactIf you have technical problems with our products, please contact the SMAServiceLine. We needthe following information in order to provide

EspañaPortugalSMA Ibérica Tecnología Solar,S.L.U.Barcelona+34935635099India SMA Solar India Pvt. Ltd.Mumbai+912261713888South Africa SMA Solar T

SMA Solar Technologywww.SMA-Solar.com

2 Safety2.1 Intended UseThe SMAString‑Monitor is a PV array junction box to which several strings can be connected inparallel. The SMAString-Monitor

2.2 Safety InformationThis section contains safety information that must be observed at all times when working on or withthe product. To prevent perso