SMA RSC-1X-US-10,RSB-2S-US-10 Installation Manual

RSS-US-IA-xx-14 | 101996-00.02 | Version 1.4

SMA RAPID SHUTDOWN SYSTEM

ENGLISH

Installation Manual

ESPAÑOL

Instrucciones de instalación

FRANÇAIS

Instructions d’installation

Legal Provisions

SMA Solar Technology America LLC

Installation ManualRSS-US-IA-xx-142

Legal Provisions

No part of this document may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, be it electronic, mechanical, photographic, magnetic or otherwise, without the prior written permission of SMA Solar Technology America LLC.

Neither SMA Solar Technology AmericaLLC nor SMA Solar Technology Canada Inc. makes representations, express or implied, with respect to this documentation or any of the equipment and/or software it may describe, including (with no limitation) any implied warranties of utility, merchantability, or fitness for any particular purpose. All such representations or warranties are expressly disclaimed. Neither SMA Solar Technology AmericaLLC nor its distributors or dealers nor SMA Solar Technology Canada Inc. nor its distributors or dealers shall be liable for any indirect, incidental, or consequential damages under any circumstances.

The exclusion of implied warranties may not apply in all cases under some statutes, and thus the above exclusion may not apply.

Specifications are subject to change without notice. Every attempt has been made to make this document complete, accurate and up-to-date. Readers are cautioned, however, that product improvements and field usage experience may cause SMA Solar Technology America LLC and/or SMA Solar Technology Canada Inc. to make changes to these specifications without advance notice, or per contract provisions in those cases where a supply agreement requires advance notice. SMA shall not be responsible for any damages, including indirect, incidental or consequential damages, caused by reliance on the material presented, including, but not limited to, omissions, typographical errors, arithmetical errors or listing errors in the content material.

Trademarks

All trademarks are recognized, even if not explicitly identified as such. Missing designations do not mean that a product or brand is not a registered trademark.

Modbus® is a registered trademark of SchneiderElectric and is licensed by the ModbusOrganization,Inc.

QRCode is a registered trademark of DENSOWAVEINCORPORATED. Phillips® and Pozidriv® are registered trademarks of PhillipsScrewCompany. Torx® is a registered trademark of AcumentGlobalTechnologies,Inc.

SMASolar TechnologyAmerica LLC

6020 West Oaks Blvd.

Suite 300 Rocklin, CA 95765 U.S.A.

SMA Solar Technology Canada Inc.

2425 Matheson Blvd. E

7th Floor

Mississauga, ON L4W 5K4

Canada

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Important Safety Instructions

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Important Safety Instructions

SAVE THESE INSTRUCTIONS

This manual contains important instructions for the following products:

• RSB-2S-US-10 (SMA Rapid Shutdown Box)

• RSC-1X-US-10 (SMA Rapid Shutdown Controller)

This manual must be followed when using this product.

The product is designed and tested in accordance with international safety requirements, but as with all electrical and electronic equipment, certain precautions must be observed when installing and/or operating the product. To reduce the risk of personal injury and to ensure the safe installation and operation of the product, you must carefully read and follow all instructions, cautions and warnings in this manual.

Warnings in this Document

A warning describes a hazard to equipment or personnel. It calls attention to a procedure or practice, which, if not correctly performed or adhered to, could result in damage to or destruction of part or all of the SMA equipment and/or other equipment connected to the SMA equipment or personal injury.

Symbol Description

DANGER indicates a hazardous situation which, if not avoided, will result in death or serious injury.

WARNING indicates a hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

NOTICE is used to address practices not related to personal injury.

Warnings on this Product

The following symbols are used as product markings with the following meanings.

Warning regarding dangerous voltage

The product works with high voltages. All work on the product must only be performed as described in the documentation of the product.

Beware of hot surface

The product can become hot during operation. Do not touch the product during operation.

Observe the operating instructions

Read the documentation of the product before working on it. Follow all safety precautions and instructions as described in the documentation.

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General Warnings

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General Warnings

WARNING

All electrical installations must be carried out in accordance with the local electrical standards and the National Electrical Code® ANSI/NFPA70 or the Canadian Electrical Code

CSAC22.1. This document does not replace and is not intended to replace any local, state, provincial, federal or national laws, regulations or codes applicable to the installation and use of the product, including without limitation applicable electrical safety codes. All installations must conform with the laws, regulations, codes and standards applicable in the jurisdiction of installation. SMA assumes no responsibility for the compliance or non-compliance with such laws or codes in connection with the installation of the product. The product contains no user-serviceable parts. For all repair and maintenance, always return the unit to an authorized SMA Service Center. Before installing or using the product, read all of the instructions, cautions, and warnings in this manual. Wiring of the product must be made by qualified personnel only.

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Table of Contents

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Table of Contents

1 Information on this Document................................................. 7

1.1 Validity........................................................................................................................ 7

1.2 Target Group.............................................................................................................. 7

1.3 Symbols ...................................................................................................................... 7

1.4 Nomenclature............................................................................................................. 7

2 Safety ........................................................................................ 8

2.1 Intended Use .............................................................................................................. 8

2.2 Safety Information...................................................................................................... 9

3 Scope of Delivery..................................................................... 10

4 Product Description.................................................................. 11

4.1 Rapid Shutdown System............................................................................................ 11

5 Mounting................................................................................... 13

5.1 Requirements for Mounting ....................................................................................... 13

5.2 Mounting the Rapid Shutdown Box on a Mounting System................................... 14

5.3 Mounting the Rapid Shutdown Box with Mounting Brackets.................................. 16

5.4 Mounting the Rapid Shutdown Controller................................................................ 17

6 Electrical Connection................................................................ 18

6.1 Safety during Electrical Connection.......................................................................... 18

6.2 Overview of the Rapid Shutdown Box Connection Area........................................ 19

6.2.1 Exterior View ............................................................................... 19

6.2.2 Interior View ................................................................................ 20

6.3 Connecting the Equipment Grounding Conductor to the Rapid Shutdown Box.... 20

6.4 Connecting the Rapid Shutdown Box and Rapid Shutdown Controller Together . 22

6.5 Connecting Rapid Shutdown Boxes Together.......................................................... 27

6.6 Connecting the Strings to Rapid Shutdown Box ...................................................... 30

7 Commissioning the Rapid Shutdown System ........................ 34

8 Checking the Function of the Rapid Shutdown System......... 35

9 Operating the Rapid Shutdown Controller............................ 36

9.1 Triggering the Rapid Shutdown Function.................................................................. 36

9.2 Resetting the Rapid Shutdown Function.................................................................... 36

10 Decommissioning the Rapid Shutdown System .................... 37

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11 Technical Data .......................................................................... 40

11.1 Rapid Shutdown Box................................................................................................. 40

11.2 Rapid Shutdown Controller....................................................................................... 40

12 Contact ...................................................................................... 42

13 Compliance Information.......................................................... 43

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1 Information on this Document

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1 Information on this Document

1.1 Validity

This document is valid for the following device types:

• RSB-2S-US-10 (SMA Rapid Shutdown Box)

• RSC-1X-US-10 (SMA Rapid Shutdown Controller)

1.2 Target Group

The tasks described in this document must only be performed by qualified persons. Qualified persons must have the following skills:

• Knowledge of how PV systems work and are operated

• Training in how to deal with the dangers and risks associated with installing and using electrical devices and installations

• Training in the installation and commissioning of electrical devices and installations

• Knowledge of the applicable standards and directives

• Knowledge of and compliance with this document and all safety information

1.3 Symbols

Symbol Explanation

Information that is important for a specific topic or goal, but is not safety-relevant

Indicates a requirement for meeting a specific goal

Desired result

A problem that might occur

1.4 Nomenclature

Complete designation Designation in this document

SMA Rapid Shutdown System Rapid Shutdown System, system, product SMA Rapid Shutdown Box Rapid Shutdown Box SMA Rapid Shutdown Controller Rapid Shutdown Controller SMA Solar Technology America LLC SMA SMA Solar Technology Canada Inc. SMA

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2 Safety

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2 Safety

2.1 Intended Use

The Rapid Shutdown System consists of one or more Rapid Shutdown Boxes and one Rapid Shutdown Controller. PV systems equipped with the Rapid Shutdown System satisfy the requirements of UL1741, Second Edition 2015 and Canadian Electrical Code 2015. The Rapid Shutdown Controller activates and deactivates the Rapid Shutdown System and signals the status of the Rapid Shutdown System via the green and red LEDs. The Rapid Shutdown Box electrically discharges the PV array conductors from the Rapid Shutdown Box to the inverter within ten seconds of activation of the emergency switch on the Rapid Shutdown Controller to ≤30V. This is done by the disconnection of the PV array on the input side of the RapidShutdownBox while the stored leading energy of the inverters is discharged simultaneously. When the irradiation on the PV array is sufficient and the voltages have been electrically discharged in accordance with specification, the green LED on the Rapid Shutdown Controller glows green constantly. When none of the LEDs of the Rapid Shutdown Controllers are glowing after actuating the emergency switch, either the irradiation on the PV array is too low and, thus, the supply voltage of the Rapid Shutdown System insufficient or the installation of the Rapid Shutdown System is faulty or the Rapid Shutdown Box is defective.

The product is certified for use in PV systems with the following SMA inverters:

• SB3000TL-US-22 / SB3800TL-US-22 / SB4000TL-US-22 / SB5000TL-US-22 / SB6000TLUS-22 / SB7000TL-US-22 / SB7700TL-US-22

• SB3.0-1SP-US-40 / SB3.8-1SP-US-40 / SB5.0-1SP-US-40 / SB6.0-1SP-US-40 / SB7.0-1SPUS-40 / SB7.7-1SP-US-40

Use of the product in PV systems with inverters of manufacturers other than SMA is not permitted. A maximum of 16 Rapid Shutdown Boxes can be operated in a Rapid Shutdown System. The product is suitable for indoor and outdoor use. All components must remain within their permitted operating ranges and their installation

requirements at all times. The product is approved for the US and Canadian market. Use this product only in accordance with the information provided in the enclosed documentation

and with the locally applicable standards and directives. Any other application may cause personal injury or property damage.

Alterations to the product, e.g. changes or modifications, are only permitted with the express written permission of SMA. Unauthorized alterations will void guarantee and warranty claims and in most cases terminate the operating license. SMA shall not be held liable for any damage caused by such changes.

Any use of the product other than that described in the Intended Use section does not qualify as the intended use.

The enclosed documentation is an integral part of this product. Keep the documentation in a convenient place for future reference and observe all instructions contained therein.

The type label must remain permanently attached to the product.

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2 Safety

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2.2 Safety Information

This section contains safety information that must be observed at all times when working on or with the product.

To prevent personal injury and property damage and to ensure long-term operation of the product, read this section carefully and observe all safety information at all times.

DANGER

Danger to life due to high voltages of the PV array

When exposed to sunlight, the PV array generates dangerous DC voltage which is present in the DC conductors. Touching the DC conductors can lead to lethal electric shocks.

• Disconnect the DC connectors on the input strings.

• Have the product mounted, installed and commissioned only by qualified persons with the appropriate skills.

• Only touch the DC cables on their insulation.

• Do not touch the DC conductors.

DANGER

Danger to life due to electric shock in case of a ground fault

If a ground fault occurs, parts of the system may still be live. Touching live components can lead to lethal electric shocks.

• Ensure that no voltage is present and wait five minutes before touching any parts of the PV system or of the Rapid Shutdown System.

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3 Scope of Delivery

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3 Scope of Delivery

Check the scope of delivery for completeness and any externally visible damage. Contact your distributor if the scope of delivery is incomplete or damaged.

Figure 1 : Components included in the scope of delivery

Position Quantity Designation

A 1 Rapid Shutdown Box B 3 Spring lock washer C 2 Clamping bracket D 3 Washer E 1 Hex nut F 2 Cylindrical screw G 1 Clamping bracket H 3 Sealing plug for positive MC4 connector I 3 Sealing plug for negative MC4 connector K 3 Five-pole plug L 2 Silicone tube (500mm (20in)) M 1 Cable tie N 1 Rapid Shutdown Controller, adapter and key* O 1 Installation manual

* Delivered in separate packaging

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4 Product Description

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4 Product Description

4.1 Rapid Shutdown System

A D

1 ... 16

Figure 2 : Schematic diagram of a Rapid Shutdown system

Position Designation

A Rapid Shutdown Controller B PV modules C Rapid Shutdown Box D Inverter E Utility grid

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4 Product Description

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Design of the Rapid Shutdown Box and Rapid Shutdown Controller

Figure 3 : Design of the Rapid Shutdown Box and Rapid Shutdown Controller

Position Designation

A DC connection for the input strings B Rapid Shutdown Box type label C Rapid Shutdown Controller type label D Rapid Shutdown Controller emergency switch E Rapid Shutdown Controller green LED F Rapid Shutdown Controller red LED

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5 Mounting

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5 Mounting

5.1 Requirements for Mounting

Requirements for the mounting location:

WARNING

Danger to life due to fire or explosion

Despite careful construction, electrical devices can cause fires.

• Do not mount the Rapid Shutdown Box or Rapid Shutdown Controller in areas containing highly flammable materials or gases.

• Do not mount the Rapid Shutdown Box or Rapid Shutdown Controller in areas exposed to explosion hazards.

☐ The Rapid Shutdown Controller must be mounted in such a way that it is visible and freely

accessible to first responders.

☐ The mounting location of the Rapid Shutdown Controller must be suitable for the weight and

dimensions of the Rapid Shutdown Controller.

☐ The Rapid Shutdown Box can be mounted on the mounting system of the PV array, directly on

the roof or on a wall. Here, there must be a distance of at least 13mm (0.5in) between the Rapid Shutdown Box and the module backsheet and the permissible cable length between the PV array and the Rapid Shutdown Box must be observed.

☐ The mounting location of the Rapid Shutdown Box must be suitable for the weight and

dimensions of the Rapid Shutdown Box (see Section11 "Technical Data", page40).

☐ The specified ambient conditions at the mounting location of the Rapid Shutdown Box and

Rapid Shutdown Controller must be observed (see Section11 "Technical Data", page40).

Permissible cable lengths:

☐ The maximum cable length of 50m (164ft) from the Rapid Shutdown Box to the Rapid

Shutdown Controller must be observed.

☐ The maximum cable length of 100m (328ft) from the first Rapid Shutdown Box to the last

Rapid Shutdown Box in the system must be observed.

☐ Observe the maximum cable length between the PV array and Rapid Shutdown Box as

specified in the National Electrical Code® ANSI/NFPA 70 or the Canadian Electrical Code

CSA C22.1.

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5 Mounting

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Dimensions for mounting the Rapid Shutdown Box:

Figure 4 : Position of the anchoring points of the Rapid Shutdown Box

Permitted and prohibited mounting positions:

☐ The Rapid Shutdown Box and Rapid Shutdown Controller may only be mounted in a

permissible position. This ensures that moisture can not penetrate the Rapid Shutdown Box or Rapid Shutdown Controller.

Figure 5 : Permitted and prohibited mounting positions

5.2 Mounting the Rapid Shutdown Box on a Mounting System

There are several ways of attaching the Rapid Shutdown Box to the mounting system of the PV array. In the following example, mounting with T-head bolts is described.

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WARNING

Risk of falling when working on the roof

There is a risk of falling or slipping when working on the rooftop. Observe the applicable accident prevention regulations for work on rooftops.

• Before stepping on the rooftop, ensure the load bearing capacity of all parts subjected to load.

• In accordance with the accident prevention regulations, a safety harness must be worn or a safety scaffold must be used.

• Use fall protection.

NOTICE

Damage to the PV module due to screws being too long

The length of the screws must be suitable for the distance between the Rapid Shutdown Box and the underside of the PV module.

• Make sure that the PV module will not be damaged by the screws being used.

Additionally required mounting material (not included in the scope of delivery):

☐ The required fastening material must be selected according to the mounting system used. ☐ The mounting material must be made of stainless steel. ☐ Diameter of the screws: maximum 8 mm (0.3 in)

Procedure:

1. Insert the T-head bolts into the mounting system and turn by 90°. This will firmly anchor the screws in the rack rail.

2. Place the Rapid Shutdown Box onto the anchored screws. Here, insert the screws into the oblong holes up to the desired fastening point.

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3. Attach the Rapid Shutdown Box using suitable washers and nuts.

4. Ensure that the Rapid Shutdown Box is securely attached.

5.3 Mounting the Rapid Shutdown Box with Mounting Brackets

If you would like to mount the Rapid Shutdown Box on the wall or directly on the roof, proceed as described in the following.

Additionally required mounting material (not included in the scope of delivery):

☐ The mounting material must be made of stainless steel. ☐ 4 screws suitable for the support surface (diameter: 8mm (0.3in)) ☐ 4 washers suitable for the screws (outer diameter: 16mm (0.6in)) ☐ Where necessary, 4 screw anchors suitable for the support surface and the screws

Procedure:

CAUTION

Risk of injury due to damaged cables

There may be power cables or other supply lines (e.g. gas or water) routed in the wall.

• Ensure that no lines are laid in the wall which could be damaged when drilling holes.

2. Align the Rapid Shutdown Box horizontally and mark the positions of the drill holes through the mounting brackets.

3. Place the Rapid Shutdown Box to one side and drill the drill holes at the positions marked.

4. Insert screw anchors into the drill holes if the support surface requires them.

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5. Align the Rapid Shutdown box over the drill holes and attach it using suitable screws and washers.

5.4 Mounting the Rapid Shutdown Controller

Additionally required mounting material (not included in the scope of delivery):

☐ 4 screws suitable for the support surface (diameter: 4mm (0.16in)) ☐ Where necessary, 4 screw anchors suitable for the support surface and the screws

Procedure:

CAUTION

Risk of injury due to damaged cables

There may be power cables or other supply lines (e.g. gas or water) routed in the wall.

• Ensure that no lines are laid in the wall which could be damaged when drilling holes.

2. Unscrew the 4 screws in the upper enclosure part of the Rapid Shutdown Controller using a cross-head screwdriver (PZ2), remove the upper enclosure part and place to one side.

3. Mark the positions of the drill holes using the 4 screw holes in the lower enclosure part of the Rapid Shutdown Controller as a guide (see the rear side of the Rapid Shutdown Controller for hole distances).

4. Place the Rapid Shutdown Controller to one side and drill the drill holes at the positions marked.

5. Insert screw anchors into the drill holes if the support surface requires them.

6. Screw the lower enclosure part of the Rapid Shutdown Controller to the wall using the screws.

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6 Electrical Connection

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6 Electrical Connection

6.1 Safety during Electrical Connection

NOTICE

Damage to the Rapid Shutdown Box from moisture and dust ingress.

Dust and moisture ingress can damage the Rapid Shutdown Box and impair its functionality.

• Do not open the Rapid Shutdown Box during rain, snow or high levels of humidity (>95%).

• Only use listed rain-tight or liquid-tight conduit fittings to attach the conduits to the enclosure. SMA recommends using conduit fittings with flat, pliable, thick rubber sealing gaskets. The sealings should be roughly 2.54mm (0.1in / 7/64in) in thickness. SMA recommends against using thinner, harder sealings (typically yellow or green colored). These sealing types may not make reliable seals for this application. These sealings are approximately

1.9mm (0.075in / 5/64in) thick or less. SMA recommends against and does not accept using conduit fittings with round cross section and o-ring type sealings as these types of seals are not reliable for this application.

• Seal all unused openings tightly.

Electrical installations

All electrical installations must be carried out in accordance with the local standards and the

National Electrical Code® ANSI/NFPA 70 or the Canadian Electrical Code® CSA C22.1.

• The electrical connection of the Rapid Shutdown System may only be made by qualified persons with appropriate skills.

• Ensure that no cables used for electrical connection are damaged.

The Rapid Shutdown function is only available if strings are correctly connected at the inverter.

The Rapid Shutdown Box controls only strings which are connected to a Rapid Shutdown Box. The Rapid Shutdown function is not available if the strings from a RapidShutdownBox are connected in parallel with any string not connected to a RapidShutdownBox.

• Do not connect any output strings of various RapidShutdownBoxes in parallel to a single input of an inverter or to another parallel connection point.

• The output strings of the RapidShutdownBox must not be connected in parallel.

• Always connect the output strings of the RapidShutdownBox to the same inverter. The output strings must not be connected to various inverters.

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6.2 Overview of the Rapid Shutdown Box Connection Area

6.2.1 Exterior View

Figure 6 : Exterior view of the Rapid Shutdown Box

Position Designation

A DC connection for the input strings 1 and 2, channel A B DC connection for the input strings 3 and 4, channel B C Connection point for the equipment grounding conductor D Enclosure opening for the Rapid Shutdown Controller conductors and where

necessary for the conductors of an additional Rapid Shutdown Box (for conduits of trade size 16mm (0.5in))

E Enclosure opening for maximum 2 output strings* and where necessary for

the conductors of the Rapid Shutdown Controller (for conduits of the trade size 21mm (0.75in))

* The input strings 1 and 2 (channel A) as well as 3 and 4 (channel B) are connected in parallel inside

the Rapid Shutdown Box.

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6.2.2 Interior View

Figure 7 : Connection area inside the Rapid Shutdown Box

Position Designation

A Terminal block for the connection of the first output string, channel A B Equipment Ground Bar C Terminal block for the connection of the Rapid Shutdown Controller and/or

for the connection of an additional Rapid Shutdown Box

D Terminal block for the connection of the second output string, channel B

6.3 Connecting the Equipment Grounding Conductor to the Rapid Shutdown Box

Each Rapid Shutdown Box can be grounded separately or several Rapid Shutdown Boxes can be connected to one equipment grounding conductor. The required material for the connection of the equipment grounding conductor are included in the scope of delivery.

Additionally required material (not included in the scope of delivery):

☐ Equipment grounding conductor

Equipment grounding conductor requirements:

☐ Conductor type: copper wire ☐ The conductor must be of solid wire. ☐ Conductor cross-section: 4mm² to 16mm² (12AWG to 6AWG)

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Procedure:

1. Place a washer onto the thread.

2. Position the equipment grounding conductor horizontally below or above the thread.

3. Place the clamping bracket onto the thread and over the equipment grounding conductor.

4. Place a spring lock washer and a hex nut onto the thread and tighten the hex nut (torque:3.5Nm (31in-lb)).

NOTICE

Prevention of contact corrosion by bending the equipment grounding conductor

The equipment grounding conductor should not be in contact with the Rapid Shutdown Box enclosure. Contact may result in corrosion at the contact surface. Contact between fastening screws and nuts is permitted.

• Bend the equipment grounding conductor in such a way that it is not in contact with the Rapid Shutdown Box enclosure.

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6.4 Connecting the Rapid Shutdown Box and Rapid Shutdown Controller Together

Additionally required material (not included in the scope of delivery):

☐ Conduit: either a separate conduit (trade size: 16mm (0.5in) or smaller with suitable reducer

bush) or use the conduit of the output strings to lay the conductors.

☐ If the conductors for the connection of the Rapid Shutdown Controller are to be laid in a

separate conduit: raintight or liquidtight conduit fitting (trade size: 16mm (0.5 in) or smaller with suitable reducer bush).

☐ When laying a tray cable for exposed run (TC-ER): use cable gland which is suitable for the

cable and the enclosure opening.

Requirements for the conductors:

☐ When laying in outdoor areas without conduit, a tray cable for exposed run (TC-ER) must be

used. ☐ Conductor type: copper wire ☐ Number of conductors: 5 ☐ If the conductors for the connection of the Rapid Shutdown Controller are laid in one conduit

together with the output strings, the conductors for the connection of the Rapid Shutdown

Controller must be insulated for the maximum PV system voltage. ☐ The conductors must be made of solid wire, stranded wire or fine stranded wire. When using

fine stranded wire, bootlace ferrules must be used. ☐ Conductor cross section: 0.75mm² to 1.5mm² (18AWG to 16AWG) ☐ Maximum length of the conductors from the Rapid Shutdown Box to the Rapid Shutdown

Controller: 50m (164ft)

Complying with the requirements for class 2 circuits

The circuit of the RapidShutdownController meets all requirements for class 2 circuits. The

maximum open-circuit voltage is 20V and maximum short-circuit current is 400mA.

Information on laying tray cables for exposed run (TC-ER)

The procedure for using conduits is described in this section. Instead of conduits, you can also

use tray cables for exposed run (TC-ER).

• When using tray cables for exposed run (TC-ER), select suitable cable glands and attach to the enclosure opening instead of the conduit. When doing so, ensure that the enclosure opening is sealed and no moisture can enter.

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Requirement:

☐ All electrical installations must be carried out in accordance with the locally applicable

electrical standards and the National Electrical Code® ANSI/NFPA 70 or the Canadian

Electrical Code® CSA C22.1.

Procedure:

If several Rapid Shutdown Boxes are present in your Rapid Shutdown System, connect the first Rapid Shutdown Box to the Rapid Shutdown Controller first. To do so, first connect one end of the conductors to the Rapid Shutdown Box and then connect the other end of the conductors to the Rapid Shutdown Controller.

• Connect the conductors to the Rapid Shutdown Box.

• Connect the conductors to the Rapid Shutdown Controller.

Connecting the conductors to the Rapid Shutdown Box

Figure 8 : Pin assignment of the lower pin row on the terminal block RSC in the Rapid Shutdown Box

Pin Assignment

1 Supply voltage (+12V)* 2 Rapid Shutdown Controller switch 3 Ground (0V) 4 Rapid Shutdown Controller green LED 5 Rapid Shutdown Controller red LED

* The open-circuit voltage may be up to 20V. The maximum short-circuit current is 400mA.

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Procedure:

1. Unscrew the four screws of the Rapid Shutdown Box enclosure lid using a hex socket screwdriver (TX25) and remove the enclosure lid.

2. If the Rapid Shutdown Controller conductors are led into a separate conduit, remove the sealing plug from one of the two enclosure openings with sealing plugs.

3. If the Rapid Shutdown Controller conductors are laid in the same conduit as the output strings, pull off the adhesive tape on the enclosure opening.

4. Insert the conduit fitting into the opening on the Rapid Shutdown Box and tighten from the inside using the counter nut.

5. Attach the conduit at the conduit fitting in the Rapid Shutdown Box enclosure.

6. Lead the conductors up to the terminal block RSC in the Rapid Shutdown Box.

7. Lead a silicone tube over the conductors inside the Rapid Shutdown Box.

8. Strip off the conductor insulation by 8mm (0.31in).

9. In the case of fine stranded wire, provide each conductor with a bootlace ferrule.

10. Connect the conductors to a five-pole plug. Observe the pin assignment.

11. Place the cable tie onto the silicone tube, tighten and cut off the projecting end of the cable tie. This connects the conductors and the silicone tube together securely.

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12. Plug the five-pole plug with the connected conductors into the lower pin row of the terminal block RSC.

13. If there is only one Rapid Shutdown Box in the system, plug the second five-pole plug into the upper row of the terminal block RSC and place a jumper wire between pins 3 and 4. Here, use a jumper wire that is rated for the maximum system voltages or insulate the jumper wire using a piece of one of the supplied silicone tubes.

Connecting the conductors to the Rapid Shutdown Controller

+ A −

− B +

RSC

NC 1

X 12X

NC 1

X 1

Figure 9 : Overview of the terminal blocks in the Rapid Shutdown Controller

Pin of the connecting terminal plate in the Rapid Shutdown Box

Terminal in the Rapid Shutdown Controller

Assignment

1 X2 Supply voltage (+12V)* 2 2 Rapid Shutdown Controller switch 3 NC 1 Ground (0V) 4 X1 Rapid Shutdown Controller green LED 5 X1 Rapid Shutdown Controller red LED

* You can select on which terminal the connection is to be made, because a bridge must be placed

between the connections later.

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Information on laying tray cables for exposed run (TC-ER)

The procedure for using conduits is described in this section. Instead of conduits, you can also use tray cables for exposed run (TC-ER).

Procedure:

1. Break out the desired knockout on the Rapid Shutdown Controller using a hammer and a screwdriver When doing so, note that when using the knockouts above and below in the lower enclosure part, that the supplied adapter must be used for conduits of the trade size 16mm (0.5in).

2. Where necessary, insert the supplied adapter in the position knocked out on the Rapid Shutdown Controller and tighten from the inside using the counter nut.

3. Attach the conduit to the conduit fitting or onto the adapter in the Rapid Shutdown Controller enclosure.

4. Lead the conductors up to the terminal blocks in the Rapid Shutdown Controller.

5. Strip off the conductor insulation by 8mm (0.31in).

6. In the case of fine stranded wire, provide each conductor with a bootlace ferrule.

7. Connect the conductors to the terminal blocks in accordance with the assignment. To do so, insert each conductor into the corresponding terminal and tighten the screw on the terminal using a cross-head screwdriver (PZ2).

8. Place a jumper wire between the terminal X2 of the green LED and terminal X2 of the red LED.

9. Ensure that all terminals are allocated to the correct conductors.

10. Ensure that the conductors are plugged completely into the terminals up to their insulation. Useful hint: To release the conductors from the terminals, the terminals must be opened. To do so, loosen the screw on the terminal using a cross-head screwdriver (PZ2).

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11.

NOTICE

Damage to the Rapid Shutdown Controller due to moisture penetration

Moisture ingress can damage the Rapid Shutdown Controller and impair its functionality.

• Place the upper enclosure part onto the lower enclosure part and tighten the four screws using a cross-head screwdriver (PZ2) (torque: 1.8Nm (16in-lb).

• Ensure that the screws with a torque of 1.8Nm (16in-lb) are tightened.

6.5 Connecting Rapid Shutdown Boxes Together

If several Rapid Shutdown Boxes are present in your Rapid Shutdown System, the Rapid Shutdown Boxes must be connected together as described in the following. You can connect a maximum of 16 Rapid Shutdown Boxes together.

Additionally required material (not included in the scope of delivery):

☐ Conduit (trade size: 16mm (0.5in) or smaller with suitable reducer bush) ☐ Raintight or liquidtight conduit fitting (trade size: 16mm (0.5in) or smaller with suitable

reducer bush)

☐ When laying a tray cable for exposed run (TC-ER): cable gland suitable for the cable and the

enclosure opening.

Requirements for the conductors:

☐ When laying in outdoor areas without conduit, a tray cable for exposed run (TC-ER) must be

used. ☐ Conductor type: copper wire ☐ Number of conductors: 5 ☐ The conductors must be made of solid wire, stranded wire or fine stranded wire. When using

fine stranded wire, bootlace ferrules must be used. ☐ Conductor cross section: 0.75mm² to 1.5mm² (18AWG to 16AWG) ☐ Maximum length of the conductors between two Rapid Shutdown Boxes: 50m (164ft) ☐ Maximum length of the conductors from the first Rapid Shutdown Box to the last Rapid

Shutdown Box: 100m (328ft)

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Information on laying tray cables for exposed run (TC-ER)

The procedure for using conduits is described in this section. Instead of conduits, you can also

use tray cables for exposed run (TC-ER).

Requirement:

☐ All electrical installations must be carried out in accordance with the locally applicable

electrical standards and the National Electrical Code® ANSI/NFPA 70 or the Canadian

Electrical Code® CSA C22.1.

Pin assignment:

Figure 10 : Pin assignment of the upper pin row on the terminal block RSC in the Rapid Shutdown Box

Pin Assignment

1 Supply voltage (+12V)* 2 Rapid Shutdown Controller switch 3 Ground (0V) 4 Rapid Shutdown Controller green LED 5 Rapid Shutdown Controller red LED

* The open-circuit voltage may be up to 20°V.

Procedure:

1. Remove the sealing plug from one of the enclosure openings with sealing plugs.

2. Insert the conduit fitting into the opening of each Rapid Shutdown Box and tighten from the inside using the counter nut.

3. Attach the conduit at the conduit fitting in each Rapid Shutdown Box enclosure.

4. Lead the conductors up to the terminal block RSC in the first Rapid Shutdown Box.

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5. Lead a silicone tube over the conductors inside the Rapid Shutdown Box.

6. Strip off the conductor insulation by 8mm (0.31in).

7. In the case of fine stranded wire, provide each conductor with a bootlace ferrule.

8. Connect the conductors to a five-pole plug. Observe the pin assignment.

9. Place the cable tie onto the silicone tube, tighten and cut off the projecting end of the cable tie. This connects the conductors and the silicone tube together securely.

10. Plug the five-pole plug with the connected conductors into the upper pin row of the terminal block RSC.

11. Connect the Rapid Shutdown Boxes together. To do so, connect the incoming conductors to a plug and plug this into the lower pin row of the connecting terminal block RSC, and always connect the outgoing conductors to a plug and plug this into the upper pin row of the terminal block RSC.

12. In the last Rapid Shutdown Box, plug the second five-pole plug into the lower pin row of the terminal block RSC and place a jumper wire between pins 3 and 4. Here, use a jumper wire that is rated for the maximum system voltages or insulate the jumper wire using a piece of one of the supplied silicone tubes.

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6.6 Connecting the Strings to Rapid Shutdown Box

Up to four input strings and two output strings can be connected to the Rapid Shutdown Box. In the Rapid Shutdown Box, two of the four input strings are connected in parallel. The input strings must be connected to the DC conductors fitted with MC4 connectors that lead from the Rapid Shutdown Box. The output strings must be connected to the corresponding terminal blocks inside the Rapid Shutdown Box.

Faulty operation of the inverter due to incorrect connection of the output strings to the Rapid Shutdown Box

The output strings must lead to the same inverter if two output strings are connected to the Rapid Shutdown Box. The operation of at least one inverter is interrupted if the two output strings are connected to different inverters.

• Connect only output strings to the terminal block A and B which are leading to the same

inverter.

Procedure:

• Connect the output strings.

• Connect the input strings.

Connecting the Output Strings

Additionally required material:

☐ Conduit (trade size: 21mm (0.75in) or smaller with suitable reducer bush) ☐ Raintight or liquidtight conduit fitting (trade size: 21mm (0.75in) or smaller with suitable

reducer bush)

Requirements on･the conductors:

☐ Conductor type: copper wire ☐ The conductors must be made of solid wire, stranded wire or fine stranded wire. When using

fine stranded wire, bootlace ferrules must be used.

☐ Conductor cross-section: 4mm² to 10mm² (12AWG to 6AWG) ☐ The maximum permitted temperature for the terminal blocks for the connection of the output

strings of +90°C (+194°F) must be observed.

☐ The conductors with regards to its ampacity, rated temperatures, operating conditions and its

power loss must be made in accordance with the local standards and the National Electrical

Code® ANSI/NFPA 70 or the Canadian Electrical Code® CSA C22.1.

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