FRO­NIUS Rapid Shutdown Box Duo User manual

Fronius prints on elemental chlorine free paper (ECF) sourced from certified sustainable forests (FSC).
/ Perfect Charging / Perfect Welding / Solar Energy
Rapid Shutdown Box - Duo
Rapid Shutdown Box - Quattro
Rapid Shutdown Box - Duo
Rapid Shutdown Box - Quattro
Rapid Shutdown Box - Duo
Rapid Shutdown Box - Quattro
EN-US
Installation instructions
Balance of System
FR
Instructions d'installation
Balance of System
ES-MX
Instrucciones de instalación
Balance of System
42,0410,2331 008-02122020

Table of contents
General 4
Safety 4
FCC / RSS Compliance 5
Device concept 6
System Limitations 6
Maximum Distance Between the Rapid Shutdown Box and the PV Array 6
Technical Data 6
Compatibility with Inverters 7
Service code 307 on the SnapInverter series 8
Service Code 1175 on the GEN24 inverter series 8
Triggering a rapid shutdown 9
Performing a reset after a rapid shutdown 9
Installing the Rapid Shutdown Box 10
Drilling pattern 11
Mounting the Rapid Shutdown Box - Duo on a rail 11
Attaching the Rapid Shutdown Box to the wall 12
Connecting the Rapid Shutdown Box 13
Wiring of the Rapid Shutdown Box - Duo 13
Connecting the wires Rapid Shutdown Box - Quattro 14
Connecting a MC4-Y-Connector 15
Connecting several Rapid Shutdown Boxes 15
Connecting the wires to the Terminals 16
Connecting the Rapid Shutdown Box to a SnapINverter 16
Connecting the Rapid Shutdown Box to GEN24 Inverter 17
Connecting the Rapid Shutdown Box Grounding 18
SnapINverter: Connecting the Rapid Shutdown Box to an emergency stop button 19
GEN24 inverter: Connecting the Rapid Shutdown Box to an emergency stop button 20
Connecting the Rapid Shutdown Box to a Fronius Primo 10.0 / 11.4 / 12.5 / 15.0 20
Connecting the Rapid Shutdown Box to a Fronius Primo GEN24 208-240 21
3
EN-US

General
Safety WARNING!
Incorrect operation and incorrectly performed work can cause serious injury and
property damage.
Only qualified staff are authorized to commission the Rapid Shutdown Box (RSB) and
only within the scope of the respective technical regulations. Do not start up or carry out
maintenance work until you have read the safety rules.
WARNING!
Work performed incorrectly can cause serious injury and damage.
The Rapid Shutdown Box should only be installed and connected by licensed electri-
cians.
Follow the safety rules!
Before any installation or connection work is carried out, disconnect the AC supply to the
inverter and the DC supply to the Rapid Shutdown Box.
WARNING!
An electric shock can be fatal.
Inadequately sized electrical components can cause serious injury and damage to prop-
erty.
▶All electrical connections must be made in accordance with the National Electrical
Code, ANSI/NFPA 70, and any other regulations applicable to the installation site.
▶Installations in Canada must be carried out in accordance with applicable Canadian
standards.
▶Only use copper wires for all spring-type terminals.
▶For all grounding cables and DC grounding wires, use a suitable thermal class, min.
194 °F (90 °C).
▶See NEC table 250.122 for correct dimensioning of the grounding wires
▶Voltage drop and other considerations may mean larger cable cross sections need
to be used.
WARNING!
An inadequate ground conductor connection can cause serious injury and dam-
age to property.
The housing screws provide an adequate ground conductor connection for grounding the
housing and should not be replaced under any circumstances by other screws that do
not provide a reliable ground conductor connection.
CAUTION!
The following points must be observed in order to prevent damage to the Rapid
Shutdown Box:
▶The technical specifications must be followed.
▶The pressure compensation membrane (1) should never be used for cabling.
4

(1)
Rapid Shutdown Box - Duo
(1)
Rapid Shutdown Box - Quattro
NOTE!
Solar modules exposed to light supply current to the Rapid Shutdown Box if they
are connected.
NOTE!
When installing outdoors, only use waterproof conduit fittings and conduits.
Conduit fittings and conduits are not included in the Rapid Shutdown Box's scope of sup-
ply. Conduit fittings must always be installed with a locknut. Ensure that the conduit fit-
tings are installed and sealed correctly.
NOTE!
When connecting DC cables, ensure the polarity is correct.
ATTENTION! ?
The trigger device (inverter) of the Rapid Shutdown Box must be marked to clearly
identify the status of the Rapid Shutdown Box.
If the Rapid Shutdown Box loses the AC connection, the inverter becomes the trigger
and display device.
FCC / RSS Com-
pliance
FCC
This device corresponds to the limit values for a digital device of class B in accordance
with Part 15 of the FCC regulations. The limit values should provide adequate protection
against harmful interference in homes. This device creates and uses high frequency
energy and can interfere with radio communications when not used in accordance with
the instructions. However, there is no guarantee against interference occurring in a par-
ticular installation.
If this device interferes with radio or television reception when turning the device on and
off, it is recommended that the user solve this with one or more of the following meas-
ures:
- adjust or reposition the receiving antenna
- increase the distance between the device and the receiver
- connect the device to another circuit, which does not include the receiver
- for further support, please contact the retailer or an experienced radio/TV technician.
Industry Canada RSS
The device corresponds to the license-free Industry Canada RSS standards. Operation
is subject to the following conditions:
(1) The device may not cause harmful interference
(2) The device must accept any interference received, including interference that may
cause undesired operation.
5
EN-US

Device concept The Rapid Shutdown Box provides a convenient and safe way to comply with Article
690.12 in the 2014 Edition of the National Electrical Code. The device is powered directly
by the PV array and is controlled depending on the state of the signal port. This signal
port can be controlled by a relay terminal in the SnapINverter Series. The use of a DC
relay, which also functions as a switch-disconnector, ensures that the PV array is galvan-
ically isolated in the case of a Rapid Shutdown.
The Rapid Shutdown Box ensures that residual energy in the capacitors of the inverter is
discharged within the required time period. To ensure that the entire system functions
correctly, the signal ports of all Rapid Shutdown Boxes must be serially connected (see
section "Connecting the Rapid Shutdown Box"). For this purpose, Duo and Quattro vari-
ants of the device and also the discontinued versions RSB Single and RSB Multi can be
mixed randomly.
The Rapid Shutdown can be initialized by means of AC failure if the signal lines are con-
nected to the inverter. Alternatively or additionally, an emergency stop button that inter-
rupts the signal wires can be used.
System Limita-
tions
- Maximum number of Rapid Shutdown Boxes per inverter: 5
- Maximum line resistance permitted in the signal loop: 300 W
- Maximum permissible wire length for signal loop using AWG 14, 16, 18 or 20: 3200ft
(1000m)
Maximum Dis-
tance Between
the Rapid Shut-
down Box and
the PV Array
Technical Data RSB Duo RSB Quattro
Max. voltage 600 V DC
Start voltage 80 V DC
Max. input current 25 A 25 A / 25 A
Power supply DC (from the PV array)
Self-consumption during operation 2 W
Permissible operating temperature -40° F to +149° F (-40° C to +65° C)
Permissible humidity 0 - 100 % (not condensing)
6

Max. altitude 13,123 ft. (4000 m)
Max. number of Controlled circuits (per
NEC)
1 2
Enclosure type NEMA 4X
Device dimensions h x w x d 11.26 x 9.7 x 2.62
in.
(286 x 246,5 x 66,6
mm)
13.82x11.54x2.62
in.
(351 x 293 x 66,6
mm)
Shipping dimensions h x w x d 13 x 12 x 5.9 in.
(330x305x150 mm)
13.78x11.81x6.1in.
(350x300x155 mm)
Shipping weight 5.95 lbs. (2,7 kg) 8.16 lbs. (3,7 kg)
Standards and regulations UL1741; LTR AE-004-2015; FCC15 Class
B
Compatibility
with Inverters Inverter (SnapINverter series) Rapid Shutdown Box - Duo / Quat-
tro
Fronius Galvo 1.5-1 208-240
Fronius Galvo 2.0-1 208-240
Fronius Galvo 2.5-1 208-240
Fronius Galvo 3.1-1 208-240
Fronius Primo 3.8-1 208-240
Fronius Primo 5.0-1 208-240
Fronius Primo 6.0-1 208-240
Fronius Primo 7.6-1 208-240
Fronius Primo 8.2-1 208-240
Fronius Primo 10.0-1 208-240 *)
Fronius Primo 11.4-1 208-240 *)
Fronius Primo 12.5-1 208-240 *)
Fronius Primo 15.0-1 208-240 *)
Fronius Symo 10.0-3 208-240
Fronius Symo 12.0-3 208-240
Fronius Symo 15.0-3 208
Fronius Symo 10.0-3 480 **)
7
EN-US

Inverter (SnapINverter series) Rapid Shutdown Box - Duo / Quat-
tro
Fronius Symo 12.5-3 480 **)
Fronius Symo 15.0-3 480 **)
Fronius Symo 17.5-3 480 **)
Fronius Symo 20.0-3 480 **)
Fronius Symo 22.7-3 480 **)
Fronius Symo 24.0-3 480 **)
Inverter (GEN24 series) Rapid Shutdown Box - Duo / Quat-
tro
Fronius Primo GEN24 3.8 / 3.8 Plus 208-240
Fronius Primo GEN24 5.0 / 5.0 Plus 208-240
Fronius Primo GEN24 6.0 / 6.0 Plus 208-240
*) Initiation via loss of AC only with Power stage SW2 version 0.6.34.4 or greater. See
section Connecting the Rapid Shutdown Box to Primo 10.0 - 15.0 for installation details
**) maximum DC voltage: 600 V
Service code 307
on the SnapIn-
verter series
Service code 307 on the display of the SnapINverter series:
Description: At the input, the inverter identifies a DC voltage too low for the grid power
feed operation. If the service code occurs for a lengthy period of time in spite of solar
radiation, the following steps can help discover the error:
- Check the position of the DC disconnector at the inverter - it should be ON
- Read the DC voltage on the display or measure it at the inverter terminals
- If the DC voltage is 0 V, this means that either the Rapid Shutdown Box is not
supplied with power from the pv array or there is no electrical connection
between the Rapid Shutdown Box and the inverter. Check DC cabling including
Rapid Shutdown Box inputs. Rapid Shutdown Box - Quattro: At least one
string has to be connected at input 1.
- If the DC voltage is approximately 28 V, this means that the Rapid Shutdown
Box is supplied with power and is waiting for approval at the signal ports. Check
cabling of the signal loop and position of any switches in the signal loop.
- If the service code still occurs in spite of solar radiation, contact your system engin-
eer.
Service Code
1175 on the
GEN24 inverter
series
Service Code 1175 on the GEN24 inverter series:
8

Description: The inverter detects insufficient DC voltage at the input for grid power feed
operation. If this service code occurs over a longer period of time despite the presence of
solar radiation, the following steps can help to find the error:
- Check the position of the DC disconnector on the inverter - should be ON
- Read the DC voltage on the display or measure it at the inverter terminals
- If the DC voltage is 0 V, this means that either the Rapid Shutdown Box is not
being supplied by the PV field or there is no electrical connection between the
Rapid Shutdown Box and the inverter. Check DC cabling including the Rapid
Shutdown Box inputs! With the Rapid Shutdown Box - Quattro at least one
string must be connected to input 1.
- If the DC voltage is approximately 28 V, this means that the Rapid Shutdown
Box is being supplied and is waiting for the release on the signal ports. Check
the wiring of the signal loop and the position of all switches in the signal loop!
- If the service code is still present despite solar radiation, contact your system
installer.
Triggering a rapid
shutdown
Two different types of rapid shutdown can be triggered depending on the configur-
ation and on-site installation:
-Via loss of AC connection (only for the SnapINverter inverter series): If the signal
loop has been connected to the inverter (see chapter Connecting the Rapid Shut-
down Box to GEN24 Inverter on page 17), a rapid shutdown can occur by inter-
rupting the AC connection. The inverter detects a failure of the AC connection and
switches off the connection to the solar modules via the Rapid Shutdown Box. The
lines are discharged and isolated.
-Via external switch: If failure detection via the AC connection is not suitable or
additional options are required, external switches can be installed in the signal loop
(see chapter SnapINverter: Connecting the Rapid Shutdown Box to an emer-
gency stop button on page 19). The Rapid Shutdown can then be triggered by
pressing one of these switches. The lines are discharged and isolated.
Performing a
reset after a rapid
shutdown
To restart the PV system after a rapid shutdown:
- If the signal line to the inverter is closed, there must be an AC connection present to
restart the PV system.
- Open the switch that was used to trigger the rapid shutdown
- Check all other external switches in the signal loop to see if they are closed.
9
EN-US

Installing the Rapid Shutdown Box
NEMA
TYPE 4X
4000 m /
13100 ft.
0 m / 0 ft.
> 4000 m /
13100 ft.
NH3
Possible mounting positions for outdoor use:
10

Drilling pattern Nameplate and warning labels should be
accessible after mounting.
Mounting the
Rapid Shutdown
Box - Duo on a
rail
ATTENTION! ?
When mounting the Rapid Shutdown Box on a rail it is recommended to fix the rail
in an elevated position for increased installation comfort.
Rapid Shutdown Box - Duo
1
Rapid Shutdown Box - Quattro
2
11
EN-US

Attaching the
Rapid Shutdown
Box to the wall
1 2
3
Fasteners not included
4
5
12

Connecting the Rapid Shutdown Box
Wiring of the
Rapid Shutdown
Box - Duo
1 2
3
8
10
4
5 6
13
EN-US

Connecting the
wires Rapid Shut-
down Box - Quat-
tro
IMPORTANT! Using 2 strings at least one string must be connected to input 1
because the Rapid Shutdown Box gets the supply from this input.
1 2
3 4
5 6
14

7If other connectors than MC4 (Stäubli)
shall be used in conjunction with the
Fronius Rapid Shutdown Box it is recom-
mended to cut the preconfigured MC4
connectors and to be replaced by pre-
ferred connector brand using proper tools
and methods. Removal of the whole cable
set is not recommended and will void war-
ranty.
Connecting a
MC4-Y-Connector
If multiple strings are connected to an MPP tracker, the string voltages should be as
equal as possible in order to avoid power losses.
1 2
Connecting sev-
eral Rapid Shut-
down Boxes
15
EN-US

Connecting the
wires to the Ter-
minals
A1 A2
DC-Output
Duo / Quattro
Quattro
Signal Port
Duo / Quattro
Duo
Connecting the
Rapid Shutdown
Box to a SnapIN-
verter
If the AC supply is interrupted, the inverter disconnects the PV DC supply via the Rapid
Shutdown Box. As soon as the AC supply is reinstated, the DC supply will resume.
The signal relay in the Fronius inverter opens if the inverter loses the AC connection.
The Rapid Shutdown Box interrupts the DC connection. However, the signal relay can
no longer be used for other functions (energy manager, alarm, etc.) if the rapid shut-
down initiation is to be triggered by an AC failure on the inverter.
The inverter does not need to be configured after connecting the Rapid Shutdown Box. If
settings have already been made regarding energy management, check this section in
the inverter Operating Instructions. The energy manager (relay mode) must be set to
'ON' (factory setting).
16

3
2
1Signal A
Signal B
put sticker on inverter
PHOTOVOLTAIC
RAPID SHUTDOWN
SYSTEM
EQUIPMENT
Connecting the
Rapid Shutdown
Box to GEN24
Inverter
If the AC supply is interrupted, the inverter disconnects the PV DC supply via the Rapid
Shutdown Box. As soon as the AC supply is reinstated, the DC supply will resume.
The signal relay in the Fronius inverter opens if the inverter loses the AC connection.
The Rapid Shutdown Box interrupts the DC connection. However, the signal relay can
no longer be used for other functions (energy manager, alarm, etc.) if the rapid shut-
down initiation is to be triggered by an AC failure on the inverter.
The inverter does not need to be configured after connecting the Rapid Shutdown Box. If
settings have already been made regarding energy management, check this section in
the inverter Operating Instructions. The energy manager (relay mode) must be set to
'ON' (factory setting).
17
EN-US

Signal ASignal B
optional
put sticker on inverter
PHOTOVOLTAIC
RAPID SHUTDOWN
SYSTEM
EQUIPMENT
Connecting the
Rapid Shutdown
Box Grounding
The hexagon nut and the spring washer required for connecting the grounding on the
threaded post are included in the scope of supply. The threaded post is electrically bon-
ded to the Rapid Shutdown Box.
Equipment grounding of RSB - Duo
1
Equipment grounding of RSB - Quattro
2
18

Optional: Connecting the Grounding to a Ground Lug - Variant 1
1 2
Optional: Connecting the Grounding to a Ground Lug - Variant 2
1 2
SnapINverter:
Connecting the
Rapid Shutdown
Box to an emer-
gency stop but-
ton
Connecting to an external emergency stop button:
If an external emergency stop is required, it can be installed anywhere in the signal line.
When the connected emergency stop button is pressed, the Rapid Shutdown is started
and the PV field is disconnected from the inverter. As soon as the emergency stop button
is returned to its original position, the PV field is reconnected.
Requirements for the external emergency stop button:
- Maximum switching load: 30 V DC / 5 mA
- Nominal voltage between contacts and housing: 600 V DC
19
EN-US

GEN24 inverter:
Connecting the
Rapid Shutdown
Box to an emer-
gency stop but-
ton
Emergency Switch Stop
Connecting to external emergency
stop:
If an external emergency stop is required,
it can be installed anywhere in the signal
line. When the connected emergency stop
button is pressed, the Rapid Shutdown is
started and the PV field is disconnected in
the Rapid Shutdown box. As soon as the
emergency stop button is returned to its
original position, the PV field is reconnec-
ted.
Requirements for external emergency
stop:
- Maximum switching load: 30 V DC / 5
mA
- Nominal voltage between contacts
and housing: 600 V DC
Connecting the
Rapid Shutdown
Box to a Fronius
Primo 10.0 / 11.4 /
12.5 / 15.0
ATTENTION! ?
Wiring schemes show best practice examples assuming that more than two PV
strings connected in parallel require overcurrent protection (e.
g. fusing). Refer to Primo installation manual regarding multi conductor wiring and fusing
details
If multiple strings are connected to an MPP tracker, the string voltages should be as
equal as possible in order to avoid power losses.
Connecting 4 Solar Module Strings to the Fronius Primo 10.0 / 11.4 / 12.5 / 15.0
RSB Quattro
20