Installation
Instructions
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
FR
ES-MX
Installation instructions
Instructions d'installation
Instrucciones de instalación
42,0410,2331 009-04112022
Table of contents
General 4
PHOTOVOLTAIK (PV) SYSTEM EQUIPPED WITH RAPID SHUTDOWN 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 7
Compatibility with Inverters 7
Service code 307 on the SnapInverter series 8
Service Code 1175 on the GEN24 inverter series 9
Triggering a rapid shutdown 9
Performing a reset after a rapid shutdown 10
Self-test 10
Installing the Rapid Shutdown Box 11
Drilling pattern 12
Mounting the Rapid Shutdown Box - Duo on a rail 12
Attaching the Rapid Shutdown Box to the wall 13
Connecting the Rapid Shutdown Box 14
Wiring of the Rapid Shutdown Box - Duo 14
Connecting the wires Rapid Shutdown Box - Quattro 15
Connecting a MC4-Y-Connector 16
Connecting several Rapid Shutdown Boxes 16
Connecting the wires to the Terminals 17
Connecting the Rapid Shutdown Box to a SnapINverter 17
Connecting the Rapid Shutdown Box to GEN24 Inverter 18
Connecting the Rapid Shutdown Box Grounding 19
SnapINverter: Connecting the Rapid Shutdown Box to an emergency stop button 20
GEN24 inverter: Connecting the Rapid Shutdown Box to an emergency stop button 21
Connecting the Rapid Shutdown Box to a Fronius Primo 10.0 / 11.4 / 12.5 / 15.0 21
Connecting the Rapid Shutdown Box to a Fronius Primo GEN24 208-240 22
EN-US
3
General
PHOTOVOLTAIK
(PV) SYSTEM
EQUIPPED
WITH RAPID
SHUTDOWN
Safety
According to the standard CSA C22.2 No.330-17, this product was developed as
a part of a “PHOTOVOLTAIK (PV) SYSTEM EQUIPPED WITH RAPID SHUT-
DOWN”.
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
electricians.
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 property.
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 damage 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.
4
CAUTION!
(1)
(1)
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.
▶
Rapid Shutdown Box - Duo
NOTE!
Solar modules exposed to light supply current to the Rapid Shutdown Box if
they are connected.
NOTE!
Rapid Shutdown Box - Quattro
EN-US
FCC / RSS Compliance
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 supply. Conduit fittings must always be installed with a locknut. Ensure
that the conduit fittings are installed and sealed correctly.
NOTE!
When connecting DC cables, ensure the polarity is correct.
IMPORTANT!
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
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 particular 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 measures:
5
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.
Device concept The Rapid Shutdown Box provides a convenient and safe way to comply with Art-
icle 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 galvanically 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 variants of the device and also the discontinued versions RSB Single and RSB Multi can be mixed randomly.
System Limitations
Maximum Distance Between
the Rapid Shutdown Box and
the PV Array
The Rapid Shutdown can be initialized by means of AC failure if the signal lines
are connected to the inverter. Alternatively or additionally, an emergency stop
button that interrupts the signal wires can be used.
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)
6
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)
Max. altitude 13,123 ft. (4000 m)
EN-US
Compatibility
with Inverters
Max. number of Controlled circuits
(per NEC)
Enclosure type NEMA 4X
Device dimensions h x w x d 11.26 x 9.7 x 2.62
(286 x 246,5 x
Shipping dimensions h x w x d 13 x 12 x 5.9 in.
(330x305x150
Shipping weight 5.95 lbs. (2,7 kg) 8.16 lbs. (3,7 kg)
Standards and regulations UL1741; LTR AE-004-2015; FCC15
Inverter (SnapINverter series) Rapid Shutdown Box - Duo / Quat-
Fronius Galvo 1.5-1 208-240
1 2
in.
66,6 mm)
mm)
Class B
tro
13.82x11.54x2.62
in.
(351 x 293 x 66,6
mm)
13.78x11.81x6.1in
.
(350x300x155
mm)
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 *)
7
Inverter (SnapINverter series) Rapid Shutdown Box - Duo / Quat-
tro
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 **)
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 SnapInverter series
8
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 Shut-
-
down 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
-
engineer.
EN-US
Service Code
1175 on the
GEN24 inverter
series
Triggering a rapid shutdown
Service Code 1175 on the GEN24 inverter series:
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 Shut-
-
down 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 sys-
-
tem installer.
Two different types of rapid shutdown can be triggered depending on the configuration 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 Shutdown Box to GEN24 Inverter on page 18), a rapid shutdown can
occur by interrupting 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 emergency stop button on page 20). The Rapid Shutdown can
then be triggered by pressing one of these switches. The lines are discharged
and isolated.
9
Performing a reset after a rapid
shutdown
Self-test A self-test of the rapid shutdown function (RSD) can only be performed manu-
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.
-
ally. The self-test only affects the discharge circuit of the Rapid Shutdown Box.
Manual self-test sequence:
A manual self-test can be triggered by an interruption of the AC connection (e.g.:
AC breaker).
The discharge of the Rapid Shutdown Box must be measured and checked using
a multimeter.
The Error-Code “AC_SystemFailure” is shown on the display of the inverter.
10
Installing the Rapid Shutdown Box
NEMA
TYPE 4X
4000 m /
13100 ft.
0 m / 0 ft.
> 4000 m /
13100 ft.
NH
3
EN-US
Possible mounting positions for outdoor use:
11
Drilling pattern Nameplate and warning labels should
be accessible after mounting.
Mounting the
Rapid Shutdown
Box - Duo on a
rail
IMPORTANT!
When mounting the Rapid Shutdown Box on a rail it is recommended to fix the
rail in an elevated position for increased installation comfort.
1
Rapid Shutdown Box - Duo
2
Rapid Shutdown Box - Quattro
12
Attaching the
Rapid Shutdown
Box to the wall
1 2
EN-US
3
5
4
Fasteners not included
13
Connecting the Rapid Shutdown Box
8
10
Wiring of the
Rapid Shutdown
Box - Duo
1 2
3
4
5 6
14
Connecting the
wires Rapid
Shutdown Box Quattro
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
EN-US
5 6
15
7
If other connectors than MC4 (Stäubli)
shall be used in conjunction with the
Fronius Rapid Shutdown Box it is recommended to cut the preconfigured
MC4 connectors and to be replaced by
preferred connector brand using proper tools and methods. Removal of the
whole cable set is not recommended
and will void warranty.
Connecting a
MC4-Y-Connector
Connecting several Rapid Shutdown Boxes
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
16
Connecting the
A1 A2
DC-Output
Duo / Quattro
Quattro
Signal Port
Duo / Quattro
Duo
wires to the Terminals
EN-US
Connecting the
Rapid Shutdown
Box to a SnapINverter
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 system status of the Rapid Shutdown Box is displayed on the AC breaker
(e.g.: emergency stop). “OFF” means, that the AC supply is interrupted and the
Rapid Shutdown Box is in a safe state. When the AC breaker is set to “ON”, the
Rapid Shutdown Box is running and the AC supply is upright.
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 shutdown initiation is to be triggered by an AC failure on the inverter.
17
The inverter does not need to be configured after connecting the Rapid Shut-
3
2
1
Signal A
Signal B
put sticker on inverter
PHOTOVOLTAIC
RAPID SHUTDOWN
SYSTEM
EQUIPMENT
down 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).
Connecting the
Rapid Shutdown
Box to GEN24
Inverter
18
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 shutdown 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).
Signal ASignal B
optional
put sticker on inverter
PHOTOVOLTAIC
RAPID SHUTDOWN
SYSTEM
EQUIPMENT
EN-US
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 bonded to the Rapid Shutdown Box.
1
Equipment grounding of RSB - Duo
2
Equipment grounding of RSB - Quattro
19
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 emergency stop button
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
-
20
GEN24 inverter:
Emergency Switch Stop
RSB Quattro
Connecting the
Rapid Shutdown
Box to an emergency stop button
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 reconnected.
Requirements for external emergency
stop:
Maximum switching load: 30 V
-
DC / 5 mA
Nominal voltage between contacts
-
and housing: 600 V DC
EN-US
Connecting the
Rapid Shutdown
Box to a Fronius
Primo 10.0 /
11.4 / 12.5 / 15.0
IMPORTANT!
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
21
Connecting 5 Solar Module Strings to the Fronius Primo 10.0 / 11.4 / 12.5 / 15.0
RSB Quattro
RSB Quattro
RSB Duo
RSB Quattro
RSB Quattro
Connecting 6 Solar Module Strings to the Fronius Primo 10.0 / 11.4 / 12.5 / 15.0
Connecting the
Rapid Shutdown
Box to a Fronius
Primo GEN24
208-240
22
IMPORTANT!
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
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