FRO­NIUS Rapid Shutdown Box-Duo User manual

/ Perfect Charging / Perfect Welding / Solar Energy
42,0410,2331 007-20022018
Rapid Shutdown Box - Duo
Rapid Shutdown Box - Quattro
Installation Instructions
Balance of System
Instrucciones de instalación
Balance of System
Instructions d'installation
Balance of System
EN-USES-MXFR

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EN-US
Contents
General ...................................................................................................................................................... 5
Safety.................................................................................................................................................... 5
FCC / RSS Compliance ........................................................................................................................ 6
Device concept ..................................................................................................................................... 6
System Limitations................................................................................................................................ 7
Maximum Distance Between the Rapid Shutdown Box and the PV Array ........................................... 7
Technical Data...................................................................................................................................... 7
Compatibility with Inverters................................................................................................................... 8
Service code 307 on the inverter .......................................................................................................... 9
Initiating Rapid Shutdown .................................................................................................................... 9
Resetting after 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 ..................................................................................... 11
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 an Inverter ........................................................................... 16
Connecting the Rapid Shutdown Box Grounding ................................................................................. 17
Connecting the Rapid Shutdown Box to an Emergency Stop Button ................................................... 18
Connecting the Rapid Shutdown Box to a Fronius Primo 10.0 / 11.4 / 12.5 / 15.0............................... 18

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General
Safety
Rapid Shutdown Box - Duo Rapid Shutdown Box - Quattro
WARNING! Incorrect operation and incorrectly performed work can cause seri-
ous injury and damage to property. Only qualified staff are authorized to commis-
sion the Rapid Shutdown Box (RSB) and only within the scope of the respective
technical regulations. Read the safety rules before installing and performing
maintenance work.
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 sup-
ply to the inverter and the DC supply to the Rapid Shutdown Box.
WARNING! An electric shock can be fatal. Inadequately sized electrical compo-
nents 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 Ca-
nadian standards.
- Use copper wire for all spring clamp terminals.
- Use min.194°F (90°C) copper wire for all grounding wires and DC Output
wires.
- See NEC table 250.122 for proper ground wire sizing.
- Voltage drop and other considerations may mean larger cable cross sections
need to be used.
WARNING! An inadequate ground conductor connection can cause serious inju-
ry and damage to property. The housing screws provide an adequate ground con-
ductor connection for grounding the housing and should not be replaced under
any circumstances by other screws that do not provide a reliable ground conduc-
tor 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) must not be used for cabling.
(1)
(1)
NOTE! Photovoltaic modules exposed to light supply energy to the Rapid Shut-
down Box when connected.

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FCC / RSS Com-
pliance
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 inverter. The use of a DC relay, which also func-
tions 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 cor-
rectly, the signal ports of all Rapid Shutdown Boxes must be serially connected (see sec-
tion "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.
NOTE! When installing outdoors, only use waterproof conduit fittings and con-
duits. Conduit fittings and conduits are not included in the Rapid Shutdown Box's
scope of supply. Conduit fittings must always be installed with a locking nut. En-
sure that the conduit fittings are installed and sealed correctly.
NOTE! When connecting DC cables, ensure the polarity is correct.
IMPORTANT! The system status indicator (inverter) shall be installed in a location in close
proximity to the system initiator, where the indication of safe shutdown can be clearly seen.
If the rapid shutdown initiation is loss of AC, the inverter acts as system initiator and indi-
cator.
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 pro-
vide adequate protection against harmful interference in homes. This device
creates and uses high frequency energy and can interfere with radio com-
munications when not used in accordance with the instructions. However,
there is no guarantee against interference occurring in a particular installa-
tion.
If this device interferes with radio or television reception when turning the de-
vice on and off, it is recommended that the user solve this with one or more
of the following measures:
- 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 receiv-
er
- 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 stan-
dards. Operation is subject to the following conditions:
(1) The device may not cause harmful interference
(2) The device must accept any interference received, including interfer-
ence that may cause undesired operation.

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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 
- 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)
Max. altitude 13,123 ft. (4000 m)

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Compatibility
with Inverters
Max. number of Controlled circuits (per
NEC)
12
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
Inverter Rapid Shutdown Box –
Duo
Rapid Shutdown Box –
Quattro
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 **)
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 **)

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*) Initiation via loss of AC only with Power stage SW2 version 0.6.34.4 or greater. See sec-
tion Connecting the Rapid Shutdown Box to Primo 10.0 - 15.0 for installation details
**) maximum DC voltage: 600 V
Service code 307
on the inverter
Service code 307 on the display of the inverter:
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 sup-
plied 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 Shut-
down 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 ca-
bling 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.
Initiating Rapid
Shutdown
Depending on the configuration and the installation situation on site there are two
possibilities to initiate Rapid Shutdown:
-Via loss of AC: If you connected the Signal loop to the inverter (see section Connect-
ing the Rapid Shutdown Box to an Inverter at page 16), you can initiate Rapid Shut-
down by disconnecting the AC connection of the inverter (e.g. at the service panel). In
such a case the inverter detects the loss of AC and triggers the Rapid Shutdown Box-
es in order to isolate the PV array from the controlled conductors and discharge them.
-Via external switch: If the initiation via loss of AC is not suitable or additional possi-
bilities are required, you can install external switches in the Signal loop (see section
Connecting the Rapid Shutdown Box to an Emergency Stop Button at page 18) If so,
Rapid Shutdown can be initiated by pressing one of those switches to trigger the Rapid
Shutdown Boxes in order to isolate the PV array from the controlled conductors and
discharge them.
Resetting after
Rapid Shutdown
In order to start-up a PV system after Rapid Shutdown:
- If the Signal loop is connected to the inverter, AC must be present to restart.
- Release the switch that was used to initate Rapid Shutdown in the first place to the
closed position
- Check all other external switches installed in the Signal loop for correct position
(closed)
Fronius Symo 24.0-3 480 **)

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Installing the Rapid Shutdown Box
NEMA
TYPE 4X
4000 m
0 m
> 4000 m
NH
3
Possible mounting positions for outdoor use:

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EN-US
Drilling pattern Nameplate and warning labels should be
accessible after mounting.
Mounting the
Rapid Shutdown
Box - Duo on a rail 1
Rapid Shutdown Box - Duo
2
Rapid Shutdown Box - Quattro
Attaching the
Rapid Shutdown
Box to the wall
1 2
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.
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3 4
Fasteners not included
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3 4
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EN-US
Connecting the Rapid Shutdown Box
Wiring of the Rap-
id Shutdown Box
- Duo
1 2
3 4
5 6
12
3
8
10
4
5 6

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Connecting the
wires Rapid Shut-
down Box - Quat-
tro
IMPORTANT! Using 2 strings at least one string must be connected to input 1 be-
cause the Rapid Shutdown Box gets the supply from this input.
1 2
3 4
5 6
12
3 4
5 6

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EN-US
7If other connectors than MC4 (Stäubli) shall
be used in conjunction with the Fronius Ra-
pid 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 hole cable set is not recommended
and will void warranty
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
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Connecting the
wires to the Ter-
minals
Connecting the
Rapid Shutdown
Box to an Inverter
Connection to the Inverter:
If the AC supply to the inverter 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 is designed to open when the inverter loses AC
power signaling the Rapid Shutdown Box to disconnect. However, the signal relay can-
not be used for further functions (Energy Manager, alarm, etc.), if the Rapid Shutdown
is to be initialized by means of an AC failure.
The inverter doesn‘t have to be configured after the installation of the Rapid Shutdown Box.
If changes were made in the section energy management, check this section in the invert-
ers user manual. The energy manager (Relay Mode) must be set ‚ON‘ (default value).
A1 A2
DC-Output
Duo / Quattro
Quattro
Signal Port
Duo / Quattro
Duo

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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
1
Equipment grounding of RSB - Quattro
3
2
1Signal A
Signal B
put sticker on inverter
PHOTOVOLTAIC
RAPID SHUTDOWN
SYSTEM
EQUIPMENT
1 1

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Optional: Connecting the Grounding to a Ground Lug - Variant 1
2 3
Optional: Connecting the Grounding to a Ground Lug - Variant 2
4 5
Connecting the
Rapid Shutdown
Box to an Emer-
gency Stop But-
ton
Connection to an External Emergency Stop Button:
If an external emergency stop is needed, it can be installed anywhere in the Signal line us-
ing standard electrical installation procedures. When pressing the Emergency Stop button
rapid shutdown is initiated and the pv-array is disconnected in the rapid shutdown box. As
soon as the Emergency Stop button returns to its original position, the pv-array is recon-
nected.
Requirements for the external emergency stop button:
- Maximum switching load 30 V DC / 5 mA
- Rated 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 If multiple strings are connected to an MPP tracker, the string voltages should be as equal
as possible in order to avoid power losses.
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12
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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Connecting 4 Solar Module Strings to the Fronius Primo 10.0 / 11.4 / 12.5 / 15.0
Connecting 5 Solar Module Strings to the Fronius Primo 10.0 / 11.4 / 12.5 / 15.0
RSB Quattro
RSB Quattro
RSB Quattro

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Connecting 6 Solar Module Strings to the Fronius Primo 10.0 / 11.4 / 12.5 / 15.0
RSB Duo
RSB Quattro
RSB Quattro