Fronius Fronius Tauro, Fronius Tauro Eco Operating Instruction [EN]

Operating
Instructions

Fronius Tauro 50-3
Fronius Tauro ECO 50-3
Fronius Tauro ECO 99-3
Fronius Tauro ECO 100-3

Operating Instructions

EN

42,0426,0307,EN 028-23022023

Contents

Safety rules 6

Explanation of safety notices 6
General 6
Environmental conditions 7
Qualified personnel 7
Safety measures at the installation location 7
Noise emission values 7
EMC measures 7
Data protection 8
Copyright 8
Protective earthing (PE) 8
Maintenance 8

General information 9

Description of the device 11

Description of the device 11
AC Daisy Chain 11
String fuses 11
Fronius Solar.web 12
Local communication 13

Protection of people and equipment 14

Safety 14
Warning notices and rating plate on the device 14
WSD (wired shutdown) 15
Central grid and system protection 15
RCMU 15
Surge protective device 16
Surge protective device (SPD) 16
AFCI – Arc Fault Circuit Interrupter (ArcGuard) 16
Safe state 17

Proper use 18

Intended use 18
Regulations governing the photovoltaic system 18

Functional principle 19

Functional principle 19
Cooling of the inverter through forced-air ventilation 19
Power derating 19

Control elements and connections 20

Controls and displays 20
PV connections - Tauro 50-3-D (direct) 20
PV connections - Tauro Eco 50-3-D (direct) 21
PV connections - Tauro 50-3-D (30A fuses) 21
PV connections - Tauro Eco 50-3-D (30A fuses) 21
PV connections - Tauro Eco 99-3-D / 100-3-D (direct, 20 A option) 22
PV connections - Tauro Eco 99-3-D / 100-3-D (direct, 30 A option) 22
PV connections - pre-combined 22
Optional DC disconnector lock 23
Mounting option for third-party components 23
Data communication area in the inverter 23
Data communication area 24
Internal schematic connection diagram of the IOs 25
Button functions and LED status indicator 26

EN

Installation and commissioning 29

General 31

System component compatibility 31

Installation location and position 32

Choosing the location of the inverter 32

3

Installation position 33

Transport 35

Crane transport 35
Transporting by counterbalanced lift truck or lift truck 35

Mounting the inverter 36

Selecting the fixing material 36
Mounting bracket dimensions 36
Mounting the inverter on the wall 36
Mounting the inverter on floor racks 38

Connecting the inverter to the public grid (AC side) 39

Monitoring the grid 39
AC connection area 39
Connecting aluminium cables 40
Permitted cables 40
Maximum alternating current fuse protection 41
Changing the clamping area for V-type terminal 42
Additional PE introduction for earthing 42
Safety 43
Opening the inverter 43
Switching off the AC disconnector option 44
Connecting the inverter to the public grid - Singlecore 44
Connecting the inverter to the public grid - Multicore 45
Connecting the inverter to the public grid - Daisy Chain 47
Connecting cables with a cable lug 48

Connecting the PV cable to the inverter 50

Safety 50
General comments regarding PV modules 51
Permitted cables 51
DC fuse protection - pre-combined 52
Example of Fronius Tauro Eco 50-3-P / 99-3-P / 100-3-P combiner box 53
Example Fronius Tauro 50-3-P combiner box 54
Distribution of the solar module strings for the direct version 54
Connecting PV cables - MC4 connector 55
MC4 connector cover 55
Connecting PV cables - Pre-combined 56
Connecting cables with a cable lug 57
Replacing the string fuses 58
Closing and switching on the inverter 60

Connecting the data communication cable 62

Modbus participants 62
Permitted cables for the data communication area 62
Multiple inverters in one network 63
Routing data communication cables 63
WSD (wired shutdown) 65

Using for the first time 67

Starting the inverter for the first time 67
Fronius system monitoring (Pilot) display 67
Installation with the app 67
Installation using the web browser 68

Switching off current supply and restarting the inverter 70

De-energising the inverter and switching it on again 70

Settings - user interface of the inverter 71

User settings 73

User login 73
Selecting the language 73

Device configuration 74

Components 74
Functions and IOs 74
"PSC editor - AUS - Demand Response Modes (DRM)" 75
Demand Response Modes (DRM) 75

4

Inverter 75

System 77

General 77
Update 77
Setup wizard 77
Restoring the factory settings 77
Event log 77
Information 77
Licence manager 78
Support 79

Communication 80

Network 80
Modbus 81
Remote control 82
Fronius Solar API 82

Safety and grid requirements 83

Country setup 83
Feed-in limitation 83
I/O power management 84
Connection diagram - 4 relay 85
I/O power management settings - 4 relays 86
Connection diagram - 3 relay 87
I/O power management settings - 3 relays 88
Connection diagram - 2 relay 89
I/O power management settings - 2 relays 90
Connection diagram - 1 relay 91
I/O power management settings - 1 relay 92

EN

Appendix 93

Status codes and remedy 95

Status Codes 95

Technical data 96

Tauro 50-3-D / 50-3-P 96
Tauro Eco 50-3-D / 50-3-P 98
Tauro Eco 99-3-D / 99-3-P 100
Tauro Eco 100-3-D / 100-3-P 102
WLAN 105
Explanation of footnotes 105
Integrated DC disconnector 105

Applicable standards and guidelines 107

CE mark 107
WLAN 107
Power failure 107

Service, warranty terms and conditions and disposal 108

Fronius SOS 108
Fronius manufacturer's warranty 108
Disposal 108

5

Safety rules

Explanation of
safety notices

Indicates a potentially hazardous situation.

▶

Indicates a situation where damage could occur.

▶

Indicates a risk of flawed results and possible damage to the equipment.

If you see any of the symbols depicted in the "Safety rules" chapter, special care
is required.

General The device has been manufactured in line with the state of the art and according

to recognised safety standards. In the event of incorrect operation or misuse,
there is a risk of:

-

-

WARNING!

If not avoided, death or serious injury may result.

CAUTION!

If not avoided, minor injury and/or damage to property may result.

NOTE!

Injury or death to the operator or a third party
Damage to the device and other material assets belonging to the operator

All personnel involved in commissioning and maintenance of the device must:

Be suitably qualified,

-

Have knowledge of and experience in dealing with electrical installations and

-

Read and follow these Operating Instructions carefully.

-

In addition to the Operating Instructions, all applicable local rules and regula­tions regarding accident prevention and environmental protection must also be
followed.

All safety and danger notices on the device:

Must be kept in a legible state

-

Must not be damaged

-

Must not be removed

-

Must not be covered, pasted or painted over

-

Only operate the device when all protection devices are fully functional. If the
protection devices are not fully functional, there is a risk of:

Injury or death to the operator or a third party

-

Damage to the device and other material assets belonging to the operator

-

Any safety devices that are not fully functional must be repaired by an author­ized specialist before the device is switched on.

Never bypass or disable protection devices.

For the location of the safety and danger notices on the device, refer to the
chapter headed "Warning notices on the device" in the Operating Instructions for
your device.

6

Faults that could compromise safety must be remedied before switching on the
device.

EN

Environmental
conditions

Qualified per­sonnel

Operation or storage of the device outside the stipulated area will be deemed as
not in accordance with the intended purpose. The manufacturer accepts no liab­ility for any damage resulting from improper use.

The servicing information contained in these Operating Instructions is intended
only for the use of qualified service engineers. An electric shock can be fatal. Do
not carry out any actions other than those described in the documentation. This
also applies to qualified personnel.

All cables and leads must be secured, undamaged, insulated, and adequately di­mensioned. Loose connections, scorched, damaged or inadequately dimensioned
cables and leads must be immediately repaired by authorised personnel.

Repair work must only be carried out by authorised personnel.

It is impossible to guarantee that bought-in parts are designed and manufac­tured to meet the demands made on them, or that they satisfy safety require­ments. Use only original spare parts (also applies to standard parts).

Do not carry out any alterations, installations, or modifications to the device
without first obtaining the manufacturer's permission.

Components that are not in perfect condition must be changed immediately.

Safety measures
at the installa­tion location

Noise emission
values

EMC measures In certain cases, even though a device complies with the standard limit values for

When installing devices with openings for cooling air, ensure that the cooling air
can enter and exit unhindered through the air ducts. Only operate the charger in
accordance with the degree of protection shown on the rating plate.

The sound power level of the inverter is specified in the Technical data.

The device is cooled as quietly as possible with the aid of an electronic temperat­ure control system; this depends on the amount of converted power, the ambient
temperature, the level of soiling of the device, etc.

It is not possible to provide a workplace-related emission value for this device
because the actual sound pressure level is heavily influenced by the installation
situation, the grid quality, the surrounding walls and the properties of the room
in general.

emissions, it may affect the application area for which it was designed (e.g., when
there is equipment that is susceptible to interference at the same location, or if
the site where the device is installed is close to either radio or television receiv­ers). If this is the case, then the operator is obliged to take appropriate action to
rectify the situation.

7

Data protection The user is responsible for the safekeeping of any changes made to the factory

settings. The manufacturer accepts no liability for any deleted personal settings.

Copyright Copyright of these operating instructions remains with the manufacturer.

The text and illustrations are all technically correct at the time of printing. We
reserve the right to make changes. The contents of the operating instructions
shall not provide the basis for any claims whatsoever on the part of the pur­chaser. If you have any suggestions for improvement, or can point out any mis­takes that you have found in the instructions, we will be most grateful for your
comments.

Protective
earthing (PE)

Maintenance In principle, Tauro inverters are maintenance-free. If maintenance work is never-

Connection of a point in the device, system or installation to earth to protect
against electric shock in the event of a fault. When installing the Tauro inverter,
the PE connection is mandatory as it is a protection class 1 device. When con­necting the PE conductor, ensure that it is secured against accidental disconnec­tion. All points listed under "Connecting the inverter to the public grid (AC side)"
must be observed, including the use of washers, screw locks, and nuts with the
defined torque.

It must be ensured that when using the strain-relief devices, the ground con­ductor is the last to be disconnected in the event of a possible failure. When con­necting the ground conductor, the minimum cross-section requirements spe­cified by the respective national regulations must be observed. In addition, the
minimum cross-section of the PE conductor must be at least half of the phase
cross-sections according to the product standard IEC 62109-1, as a cross-sec­tion of at least 35 mm² (50 kW) or 70 mm² (99.99 / 100 kW) must be used for the
phases (L1 / L2 / L3).

theless carried out on the inverter, such as cleaning or replacing components,
this must be done in consultation with a Fronius-trained service technician. The
manufacturer accepts no liability for damage caused by improper use.

8

General information

9

10

Description of the device

EN

Description of
the device

AC Daisy Chain With the "AC Daisy Chain" inverter version, the AC lead can be fed directly from

The inverter transforms the direct current generated by the solar modules into
alternating current. This alternating current is fed into the public grid synchron­ously with the grid voltage.
The inverter has been developed exclusively for use in grid-connected photovol­taic systems; it is impossible to generate energy independently of the public grid.

Thanks to its design and the way it works, the inverter is extremely safe both to
install and to operate.
The inverter automatically monitors the public grid. In the event of abnormal grid
conditions, the inverter ceases operating immediately and stops feeding power
into the grid (e.g. if the grid is switched off, if there is an interruption, etc.).
The grid is monitored by monitoring the voltage, frequency and islanding condi­tions.

the inverter to another inverter. Several Tauro inverters, up to an output power of
max. 200 kW, can be thereby be quickly connected to one another.

The minimum cable cross-section is defined by the fuse at the mains connection
point. A larger cable cross-section can be selected at any time. The applicable
national standards must be taken into account and applied.

String fuses Only applies to device types Fronius Tauro 50-3-D / Eco 50-3-D / Eco 99-3-D /

Eco 100-3-D (direct):

String fuses are used in the Fronius Tauro to provide additional protection for the
solar modules.
The maximum short circuit current Isc, the maximum module return current IR or

the maximum string fuse rating specified in the module data sheet of the re­spective solar module is crucial in affording the solar modules the correct fuse
protection.

The national regulations regarding fuse protection must be observed. The elec­trical engineer carrying out the installation is responsible for the correct choice
of string fuses.

11

To replace the string fuses, see chapter Replacing the string fuses on page 58.

Eco 50-3-D

Eco 99-3-D / Eco 100-3-D Standard

F1.1 - F2.7

Eco 99-3-D / Eco 100-3-D

Standard

F3.1 - F3.8

50-3-D

F1.1 - F3.7

F3.1-

F3.1+

F3.2-

F3.2+

F3.3-

F3.3+

F3.4-

F3.4+

F3.5-

F3.5+

Eco 50-3-D

30A fuses F1.1 - F2.5

50-3-D / Eco 99-3-D / Eco 100-3-D

30A fuses F1.1 - F3.5

Fronius Sol­ar.web

With Fronius Solar.web or Fronius Solar.web Premium, the PV system can be
easily monitored and analysed by the system owner and installer. If configured
accordingly, the inverter transmits data such as power, yields, load, and energy
balance to Fronius Solar.web. For more information see Solar.web - monitoring &

analysis.

Configuration is carried out via the setup wizard, see chapter Installation with

the app on page 67 or Installation using the web browser on page 68.

12

Prerequisites for configuration:

Internet connection (download: min. 512 kBit/s, upload: min. 256 kBit/s)*.

-

User account on solarweb.com.

-

Completed configuration via the setup wizard.

-

* The information given does not constitute an absolute guarantee of fault-

less function. High error rates in the transmission, reception fluctuations
or transmission drop-outs can have a negative effect on the data transfer.
Fronius recommends testing the Internet connection on site according to
the minimum requirements.

EN

Local commu­nication

The inverter can be found via the Multicast DNS protocol (mDNS). It is recom­mended to search for the inverter by the assigned host name.

The following data can be retrieved via mDNS:

NominalPower

-

Systemname

-

DeviceSerialNumber

-

SoftwareBundleVersion

-

13

Protection of people and equipment

Safety

Warning notices
and rating plate
on the device

WARNING!

Danger due to incorrect operation and incorrectly performed work.

This can result in serious injury and damage to property.

All the work and functions described in this document must only be carried

▶

out by trained and qualified personnel.
Read and understand this document.

▶

Read and understand all the Operating Instructions for the system compon-

▶

ents, especially the safety rules.

WARNING!

Danger from electromagnetic fields. Electromagnetic fields are generated dur­ing operation.

Effects on the health of persons, e.g. those wearing a pacemaker can result.

Do not remain closer than 20 cm from the inverter for a prolonged period of

▶

time.

There are warning notices and safety symbols on and in the inverter. These warn­ing notices and safety symbols must not be removed or painted over. They warn
against incorrect operation, as this may result in serious injury and damage.

Symbols on the rating plate:

CE mark – confirms compliance with applicable EU directives and
regulations.

UKCA mark – confirms compliance with applicable UK directives and
regulations.

A 4-digit number (coded production
date) is printed at the very bottom of
the rating plate, from which the pro­duction date can be calculated.
If you subtract the value 11 from the
first two digits, you get the production
year.
The last two digits represent the calen­dar week in which the device was pro­duced.

Example: Value on rating plate = 3205

32 - 11 = 21 → Production year 2021
05 = Calendar week 05

14

WEEE mark – waste electrical and electronic equipment must be
collected separately and recycled in an environmentally sound manner
in accordance with the European Directive and national law.

RCM mark – tested in accordance with the requirements of Australia
and New Zealand.

ICASA mark – tested in accordance with the requirements of the
Independent Communications Authority of South Africa.

CMIM mark – tested in accordance with IMANOR requirements for
import regulations and compliance with Moroccan standards.

Safety symbols:

Risk of serious injury and property damage due to incorrect operation.

Do not use the functions described here until you have fully read and
understood the following documents:

These Operating Instructions.

-

All Operating Instructions for the system components of the

-

photovoltaic system, especially the safety rules.

Dangerous electrical voltage.

Before opening the machine, wait for the capacitors to discharge!

Text of the warning notices:

EN

WSD (wired
shutdown)

Central grid and
system protec­tion

WARNING!

An electric shock can be fatal. Before opening the device, ensure that the input
and output sides are de-energised and insulated.

The wired shutdown (WSD) interrupts the inverter feeding energy into the grid if
the trigger device (switch, e.g. emergency stop or fire alarm switch) has been ac­tivated.

If an inverter (secondary device) fails, it is bypassed and the other inverters con­tinue operating. If a second inverter (secondary device) or the inverter (primary
device) fails, the operation of the entire WSD chain is interrupted.

For installation, see WSD (wired shutdown) on page 65.

The inverter offers the option to use the integrated AC relays as coupling
switches in conjunction with a central grid and system protection unit (in accord­ance with VDE-AR-N 4105:2018:11 §6.4.1). For this purpose, the central trigger
device (switch) must be integrated into the WSD chain as described in the
chapter "WSD (Wired Shut Down)".

RCMU The inverter is equipped with a universal current-sensitive residual current monit-

oring unit (RCMU = Residual Current Monitoring Unit) in accordance with IEC
62109-2 and IEC63112.
This device monitors residual currents from the PV module to the AC output of
the inverter and disconnects the inverter from the grid in the event of unauthor­ised residual current.

15

Surge protective
device

The inverter is equipped with an integrated surge protective device on the DC
and AC side in accordance with IEC 62109-2. The surge protective device pro­tects the system against damage in the event of a surge.

Surge protective
device (SPD)

AFCI – Arc Fault
Circuit Inter­rupter (Arc­Guard)

The surge protective device (SPD) protects against temporary over­voltages and dissipates surge currents (e.g. lightning strike). Building on
an overall lightning protection concept, the SPD helps to protect your
PV system components.

If the surge protective device is triggered, the colour of the indicator
changes from green to red (mechanical display).

There is the option of a digital indication when an SPD has tripped. For
setting this function, see PDF "Temporary SPD Triggering" in the Service
& Support area at www.fronius.com

IMPORTANT!

After setting the function described above, the inverter will also respond if the 2­pole signal cable of the surge protective device is interrupted or damaged.

Available ex works.

AFCI (Arc Fault Circuit Interrupter) protects against arcing faults and in the nar­rower sense is a protection device against contact faults. The AFCI evaluates any
faults that occur in the current and voltage curve with an electronic circuit and
switches off the circuit when a contact fault is detected. This prevents overheat­ing on poor contacts and possible fires.

IMPORTANT!

Active solar module electronics can interfere with the function of the ArcGuard.
Fronius does not guarantee the correct functioning when using Fronius ArcGuard
in combination with active solar module electronics.

CAUTION!

Danger due to incorrect or unprofessional DC installation.

This can result in risk of damage and, in turn, risk of fire to the PV system due to
inadmissible thermal loads that arise with an arc.

Check that plug connections are in good condition.

▶

Repair incorrect insulation as appropriate.

▶

Complete connections as per the specifications.

▶

IMPORTANT!

Fronius will not accept any costs associated with production downtimes, installer
costs, etc., that may arise as the result of a detected arc and its consequences.
Fronius accepts no liability for damage that can occur despite the presence of
the integrated Arc Fault Circuit Interrupter/extinguishing system ( e.g. caused by
a parallel arc).

Automatic reconnection

To restart the AFCI, no manual procedure is required if a minimum interruption
time of 5 minutes is ensured before continuing operation.
When interrupting for the fifth time within a 24 h period, the AFCI is only al­lowed to be reset manually before the AFCI does reconnect. Afterwards, the
AFCI may return to automatic reconnection mode.

16

Safe state If one of the following safety devices trips, the inverter will change to a safe

state:

WSD

-

isolation measurement

-

RCMU and

-

AFCI

-

In the safe state, the inverter no longer feeds into the grid and is disconnected
from the grid by opening the AC relays.

EN

17

Proper use

Intended use The solar inverter is intended exclusively to convert direct current from solar

modules into alternating current and to feed this into the public grid.
Utilisation not in accordance with the intended purpose comprises:

Utilisation for any other purpose, or in any other manner

-

Making any modifications to the inverter that have not been expressly ap-

-

proved by Fronius
Installation of parts that are not distributed or expressly approved by Froni-

-

us

The manufacturer shall not be liable for any damage resulting from such use. All
warranty claims will be forfeited.

Intended use also includes complying with all the instructions in the Operating
Instructions.

Regulations gov­erning the
photovoltaic sys­tem

The inverter is designed to be connected and used exclusively in conjunction with
solar modules.
Use of the inverter with other DC generators (e.g. wind generators) is not permit­ted.

When designing the photovoltaic system, ensure that all of its components are
operated within their permitted operating ranges at all times.

Observe all the measures recommended by the solar module manufacturer to
ensure that the solar module retains its properties in the long term.

18

Functional principle

EN

Functional prin­ciple

Cooling of the
inverter through
forced-air ventil­ation

The inverter operates fully automatically. As soon after sunrise as there is suffi­cient energy available from the solar modules, the inverter starts checking the
PV system (insulation measurement), and the grid (grid voltage and grid fre­quency). If all values are within the normative scope, automatic connection to the
grid and feeding of energy into the grid takes place.

The inverter works in a way that ensures the maximum power possible is obtained
from the solar modules. This is known as "Maximum Power Point Tracking"
(MPPT). In the event of shading of the solar modules, the function "Dynamic
Peak Manager" can be used to obtain the majority of the local maximum output
(LMPP) of the PV system.

After dusk, as soon as the power available has fallen below the level at which en­ergy can be fed into the grid, the inverter disconnects the power electronics
completely from the grid and stops running. It retains all its settings and stored
data.

Cooling of the inverter is performed by a forced-air ventilation system via tem­perature-controlled fans. Air is sucked in from the front and fed, via a sealed
duct, through the AC and DC heat sink, before passing directly over the induct­ors and dissipating.
The sealed air duct prevents the electronics compartment from coming into con­tact with the ambient air. This approach largely prevents any contamination of
the electronics compartment.
The fan speed and temperature of the inverter are monitored.

The variable-speed, ball-bearing mounted fans in the inverter permit the follow­ing:

Optimum cooling of the inverter

-

Cooler components, therefore a longer service life

-

Lowest-possible energy consumption

-

High output power including in top temperature range of the inverter

-

Power derating If the inverter becomes too hot, it automatically reduces the current output

power in order to protect itself. Reasons for the inverter becoming too hot in­clude too high an ambient temperature or inadequate heat dissipation (e.g. when
installed in containers without proper heat dissipation measures).

A power derating system restricts the output from the inverter in order to pre­vent the temperature from exceeding the permissible value.
If a maximum temperature is exceeded, the inverter switches off in a safe state
and does not resume feeding energy into the grid until the device has cooled
down.

19

Control elements and connections

Controls and dis­plays

(1) DC disconnector

Disconnects the electrical con­nection from the solar modules
to the inverter. Depending on
the device type, 2 or 3 DC dis­connectors are installed.
The DC disconnectors can be
secured against switching on
with a padlock.

(2) AC disconnector option

The optional AC disconnector
breaks the connection from the
inverter to the grid

(3) Button function

For further information about
the button function, see But-

ton functions and LED status
indicator

(4) LED status indicator

For further information about
the LED status indicator, see

Button functions and LED
status indicator

PV connections ­Tauro 50-3-D
(direct)

20

PV connections ­Tauro Eco 50-3­D (direct)

PV connections ­Tauro 50-3-D
(30A fuses)

EN

PV connections ­Tauro Eco 50-3­D (30A fuses)

21

PV connections ­Tauro Eco 99-3­D / 100-3-D (dir­ect, 20 A option)

PV connections ­Tauro Eco 99-3­D / 100-3-D (dir­ect, 30 A option)

PV connections ­pre-combined

22

Tauro Eco 50-3-P / 99-3-P / 100-3-P Tauro 50-3-P

Optional DC dis­connector lock

With the optionally available DC dis­connector lock, the inverter can be se­cured against unintentional switching
off.

EN

Mounting option
for third-party
components

Data communic­ation area in the
inverter

Above the DC connection area there is
space for mounting third-party com­ponents. Components up to a maxim­um width of 14.5 cm (8 DU) can be
mounted on the DIN rail. The compon­ents must have a temperature resist­ance of ‑40 °C to +85 °C.

The data communication area (Pilot PC board) is located above the DC connec­tions in the inverter.

23

Data communic­ation area

Modbus terminal Push-in terminal for the installation of

Modbus 0, Modbus 1, 12 V and GND
(ground).

The data connection to the connected
components is established via the
Modbus terminal. The inputs M0 and

M1 can be selected for this purpose.

Max. 4 Modbus participants per input,
see chapter Modbus participants on
page 62.

WSD (wired shutdown) switch Defines the inverter as a WSD primary

device or WSD secondary device.

Position 1: WSD primary device
Position 0: WSD secondary device

Modbus 0 (MB0) switch Switches the terminating resistor for

Modbus 0 (MB0) on/off.

Position 1: Terminating resistor on
(factory setting)

Position 0: Terminating resistor off

Modbus 1 (MB1) switch Switches the terminating resistor for

Modbus 1 (MB1) on/off.

Position 1: Terminating resistor on
(factory setting)

Position 0: Terminating resistor off

Optical sensor

Communication LED

To operate the inverter. See chapter

Button functions and LED status in­dicator on page 26.

Indicates the inverter connection
status.

24

Operating status LED

Indicates the inverter operating
status.

LAN 1 Ethernet connection for data commu-

nication (e.g. WLAN router, home net­work or for commissioning with a
laptop see chapter Installation using

the web browser on page 68).

LAN 2 Reserved for future functions. Only

use LAN 1 to avoid malfunctions.

WSD terminal Push-in terminal for the WSD installa-

tion. See chapter "WSD (wired shut-

down)" on page 65.

IOs terminal Push-in terminal for digital inputs/

outputs. See chapter Permitted

cables for the data communication
area on page 62.

The designations (RG0, CL0, 1/5, 2/6,
3/7, 4/8) on the terminal refer to the
Demand Response Mode function, see
chapter "PSC editor - AUS - Demand

Response Modes (DRM)" on page 75.

EN

Internal schem­atic connection
diagram of the
IOs

On the V+/GND pin, it is possible to feed in a voltage of around 12.5–24 V (+ max.
20%) with an external power supply. The outputs IO 0–5 can then be operated
with the external voltage. A maximum of 1 A can be drawn per output, with a
maximum of 3 A allowed in total. The fuse protection must be located externally.

CAUTION!

Risk of polarity reversal at the terminals due to improper connection of external
power supplies.

This may result in severe damage to the inverter.

Check the polarity of the external power supply with a suitable measuring

▶

device before connecting it.
Connect the cables to the V+/GND outputs with the correct polarity.

▶

IMPORTANT!

If the total output (6 W) is exceeded, the inverter switches off the entire external
power supply.

25

12 V DC

500 mA

V+ V+

GND

IO0

IO1

IN8

IN9

IN10

IN11

IN6

IN7

IO4

IO5

IO2

IO3

GND

(1)

12 V

USB

TYP A

5 V

IO4

V+

V+

IO0

IO2

IN6

IN8

IN10IN11

IN9

IN7

IO5

IO3

IO1

GND

GND

M0-

M0+

M1-

M1+

SHIELD

SHIELD

V+ V+

GND GND

V+

V+

M0+

SHIELD

M1+

GND

M1-

SHIELD

M0-

GND

(1) Power limitation

Ok

Standby

Uncritical Error
(flashing)

Critical Error

Network Error

Connecting
(flashing)

Connected

1x WLAN access point
2x WPS
3-6 sec. Quit Service Message

Button functions
and LED status
indicator

Sensor functions

The status of the inverter is
shown via the operating status
LED. In the event of faults,
carry out the individual steps
in the Fronius Solar.web live
app.

The optical sensor is actuated
by touching with a finger.

The status of the connection is
shown via the communication
LED. To establish the connec­tion, carry out the individual
steps in the Fronius Solar.web
live app.

1x = WLAN access point (AP) is opened.

Flashing blue

26

2x = WLAN Protected Setup (WPS) is activated.

Flashing green

3 seconds (max. 6 seconds) = the service notification is
terminated.

Lights up yellow

LED status indicator

The inverter is operating correctly.

Lights up green

The inverter starts.

Flashing green

The inverter is in standby, is not operational (e.g. no

feed-in at night) or is not configured.

Lights up yellow

The inverter indicates a non-critical status.

Flashing yellow

The inverter indicates a critical status and there is no

grid power feed process.

Lights up red

The network connection is being established via WPS.

2x = WPS search mode.

EN

Flashing green

The network connection is being established via

WLAN AP.
1x = WLAN AP search mode (active for 30 minutes).

Flashing blue

The network connection is not configured.

Lights up yellow

The inverter is operating correctly, a network fault is in-

dicated.

Lights up red

The inverter is performing an update.

/ Flashing blue

27

28

Installation and commissioning

29

30