SICK miniTwin2 Original Instructions Manual

miniTwin2

Safety light curtain

OPERATING INSTRUCTIONS

Operating Instructions

miniTwin2

This document is protected by the law of copyright, whereby all rights established therein remain with the company SICK AG. Reproduction of this document or parts of this document is only permissible within the limits of the legal determination of Copyright Law. Alteration or abridgement of the document is not permitted without the explicit written approval of the company SICK AG.

Subject to change without notice

Operating Instructions

miniTwin2

Device change history

The following table describes technical changes that have been made to the device during

product updates. The change status of the device can be seen from the supplementary revision number “(Rev. #)” in the Ident No. field on the type label.

Revision number in the

Ident No. field

No revision number Initial device version

(Rev. 1) Addition of the cross-circuit

Change Further information

monitoring function

Chapter 3.1,

page 11

Subject to change without notice

Contents

miniTwin2

Operating Instructions

Contents

1 About this document ........................................................................................................ 6

1.1 Function of this document ................................................................................... 6

.2 Target group.......................................................................................................... 6

1.3 Scope..................................................................................................................... 6

1.4 Information depth................................................................................................. 6

1.5 Abbreviations ........................................................................................................ 7

1.6 Symbols used........................................................................................................ 7

2 On safety ............................................................................................................................ 8

2.1 Qualified safety personnel ................................................................................... 8

2.2 Applications of the device.................................................................................... 8

2.3 Correct use............................................................................................................ 9

2.4 General safety notes and protective measures.................................................. 9

2.5 Environmental protection................................................................................... 10

2.5.1 Disposal............................................................................................. 10

2.5.2 Separation of materials.................................................................... 10

3 Product description ........................................................................................................11

3.1 Special features.................................................................................................. 11

3.2 Operating principle of the device....................................................................... 12

3.2.1 Device components.......................................................................... 12

3.2.2 Operating principle safety light curtain ...........................................13

3.2.3 Cascading.......................................................................................... 14

3.3 Application examples ......................................................................................... 15

3.4 Status indicators................................................................................................. 16

3.5 Configurable functions .......................................................................................18

3.5.1 Reset ................................................................................................. 19

3.5.2 External device monitoring (EDM) ...................................................21

4 Mounting.......................................................................................................................... 22

4.1 Determining the minimum distance.................................................................. 22

4.1.1 Minimum distance from the hazardous point................................. 22

4.1.2 Minimum distance to reflective surfaces........................................ 25

4.1.3 Minimum distance for cascaded systems.......................................26

4.2 Steps for mounting the device........................................................................... 27

4.2.1 Mounting direction of the Twin Sticks ............................................. 28

4.2.2 Mounting possibilities ...................................................................... 28

4.2.3 Mounting with OAFix bracket ............................................................ 29

4.2.4 Mounting with CAFix bracket............................................................. 31

4.2.5 Mounting with LAFix bracket .............................................................33

4.2.6 Mounting with CAFix bracket and LAFix bracket ...............................35

4.2.7 Mounting with CAFix-Flex bracket ..................................................... 37

4.3 Resolution at the end of the Twin Sticks...........................................................40

5 Electrical installation .....................................................................................................41

5.1 System connection ............................................................................................. 43

5.1.1 Pin assignment system connection................................................. 44

5.2 Cascading............................................................................................................ 45

5.2.1 Changes to cascaded systems ........................................................ 46

5.3 Protective operation without Reset and/or without EDM ................................47

5.4 Reset button ....................................................................................................... 48

5.5 External device monitoring (EDM) .....................................................................49

5.6 Connection diagrams ......................................................................................... 50

Subject to change without notice

Operating Instructions

miniTwin2

Contents

6 Commissioning and configuration ................................................................................52

6.1 Display sequence during switching on...............................................................52

6.2 Alignment of the safety light curtain..................................................................53

6.3 Default delivery status........................................................................................55

6.4 Configuration of protective operation without Reset and/or

without EDM ........................................................................................................55

6.5 Configuration of the Reset function...................................................................55

6.6 Configuration of the external device monitoring (EDM)....................................56

6.7 Test notes ............................................................................................................56

6.7.1 Tests before the initial commissioning............................................56

6.7.2 Regular inspection of the protective device by qualified

safety personnel................................................................................56

6.7.3 Daily functional checks of the protective device.............................57

6.8 Deactivating Reset and EDM..............................................................................58

7 Care and maintenance ...................................................................................................61

8 Fault diagnosis ................................................................................................................62

8.1 In the event of faults or errors............................................................................62

8.2 SICK support........................................................................................................62

8.3 Error displays of the diagnostics LEDs...............................................................62

9 Technical specifications .................................................................................................64

9.1 Data sheet ...........................................................................................................64

9.2 Weight tables.......................................................................................................67

9.2.1 miniTwin2 ..........................................................................................67

9.2.2 Deflector mirrors PNS75 and PNS125............................................67

9.3 Dimensional drawings ........................................................................................68

9.3.1 miniTwin2 ..........................................................................................68

9.3.2 OAFix bracket......................................................................................69

9.3.3 LAFix bracket, C-Fix bracket (set) ......................................................69

9.3.4 C-Fix-Flex bracket (pivoting)..............................................................70

9.3.5 Deflector mirror PNS75 ....................................................................71

9.3.6 Deflector mirror PNS125 ..................................................................72

10 Ordering information .......................................................................................................73

10.1 miniTwin2: standalone devices or cascade end units ......................................73

10.2 miniTwin2: cascade devices...............................................................................74

10.3 miniTwin2: standalone devices with OAFix bracket ...........................................75

10.4 Additional front screen (weld spark guard) .......................................................76

10.5 Deflector mirror ...................................................................................................76

10.6 Accessories..........................................................................................................77

11 Annex ................................................................................................................................78

11.1 Compliance with EU directives ...........................................................................78

11.2 Checklist for the manufacturer ..........................................................................79

11.3 List of tables........................................................................................................80

11.4 List of illustrations...............................................................................................81

Subject to change without notice

Chapter 1 Operating Instructions

miniTwin2

About this document

1 About this document

lease read this chapter carefully before working with this documentation and the

P miniTwin2.

1.1 Function of this document

These operating instructions are designed to address the technical personnel of the machine manufacturer or the machine operator in regards to safe mounting, installation,

configuration, electrical installation, commissioning, operation and maintenance of the

miniTwin2 safety light curtain.

These operating instructions do not provide instructions for operating machines on which

the safety light curtain is, or will be, integrated. Information on this is to be found in the appropriate operating instructions for the machine.

1.2 Target group

These operating instructions are addressed to planning engineers, machine designers and operators of plants and systems which are to be protected by one or several miniTwin2

safety light curtains. It also addresses people who integrate the miniTwin2 into a machine, initialise its use, or who are in charge of servicing and maintaining the device.

Note

1.3 Scope

These operating instructions are original operating instructions.

These operating instructions apply to the miniTwin2 safety light curtain with one of the following entries on the type label in the field Operating Instructions:

 8013480/V114

 8013480/YY19

 8013480/YT85

This document is part of SICK part number 8013480 (operating instructions “miniTwin2”

in all available languages).

1.4 Information depth

These operating instructions contain information on:

 mounting

 electrical installation

 commissioning and configuration

 care and maintenance

Planning and using protective devices such as the miniTwin2 also require specific

technical skills which are not detailed in this documentation.

When operating the miniTwin2, the national, local and statutory rules and regulations must

be observed.

General information on accident prevention using opto-electronic protective devices can

be found in the SICK competence brochure “Guidelines Safe Machinery”.

 fault, error diagnosis and

troubleshooting

 part numbers

 conformity and approval

Subject to change without notice

Operating Instructions Chapter 1

miniTwin2

About this document

Note

COM

EDM

ERR

ESPE

OSSD

RES

We also refer you to the SICK homepage on the Internet at www.sick.com.

Here you will find information on:

 sample applications

 a list of frequently asked questions regarding the miniTwin2

 these operating instructions in different languages for viewing and printing

 the latest certificates on the prototype test, the EU declaration of conformity and other

documents

1.5 Abbreviations

Communication

External device monitoring

Error

Electro-sensitive protective equipment (e.g. miniTwin2)

Output signal switching device

Reset

1.6 Symbols used

Recommendation

Note

, , 

 Take action …



WARNING

Recommendations are designed to give you some assistance in your decision-making

process with respect to a certain function or a technical measure.

Refer to notes for special features of the device.

LED symbols describe the state of a diagnostics LED. Examples:

 The LED is illuminated constantly.  The LED is flashing.  The LED is off.

Instructions for taking action are shown by an arrow. Read carefully and follow the instructions for action.

Warning!

A warning indicates an actual or potential risk or health hazard. They are designed to help

you to prevent accidents.

Read carefully and follow the warning notices!

The term “dangerous state”

The dangerous state (standard term) of the machine is always shown in the drawings and diagrams of this document as a movement of a machine part. In practical operation, there

may be a number of different dangerous states:

 machine movements

 electrical conductors

 visible or invisible radiation

 a combination of several risks and hazards

Subject to change without notice

Chapter 2 Operating Instructions

miniTwin2

On safety

2 On safety

his chapter deals with your own safety and the safety of the equipment operators.

 Please read this chapter carefully before working with the miniTwin2 or with the

machine protected by the miniTwin2.

2.1 Qualified safety personnel

The miniTwin2 safety light curtain must be installed, connected, commissioned and serviced only by qualified safety personnel. Qualified safety personnel are defined as

persons who …

 due to their specialist training and experience have adequate knowledge of the power-

driven equipment to be checked

and

 have been instructed by the responsible machine owner in the operation of the machine

and the current valid safety guidelines

and

 are sufficiently familiar with the applicable official health and work safety regulations,

directives and generally recognized engineering practice (e.g. DIN standards, VDE stipulations, engineering regulations from other EU member states) that they can assess the work safety aspects of the power-driven equipment

and

 who have access to these operating instructions and who have read them.

As a rule these are qualified safety personnel from the ESPE manufacturer or also those

persons who have been appropriately trained at the ESPE manufacturer, are primarily involved in checking ESPE and are allocated the task by the organisation operating the ESPE.



WARNING

2.2 Applications of the device

The miniTwin2 safety light curtain is an electro-sensitive protective equipment (ESPE) type 2 according to IEC 61496A1. The safety level of the miniTwin2 corresponds to category 2 PL c according to EN ISO 13849A1 and SIL1 according to IEC 61508.

The miniTwin2 safety light curtain is suitable for:

 hazardous point protection (finger and hand protection)

 hazardous area protection

 access protection

Access to the hazardous point must be allowed only through the protective field. The

plant/system is not allowed to start as long as personnel are within the hazardous area. Refer to section 3.3 “Application examples” on page 15 for an illustration of the protection

modes.

Only use the safety light curtain as an indirect protective measure!

An opto-electronic protective device provides indirect protection, e.g. by switching off the power at the source of the hazard. It cannot provide protection from parts thrown out, nor

from emitted radiation. Transparent objects are not detected.

Depending on the application, mechanical guards may be required in addition to the safety light curtain.

Subject to change without notice

Operating Instructions Chapter 2

miniTwin2

On safety

2.3 Correct use

he miniTwin2 safety light curtain must be used only as defined in section 2.2

“Applications of the device”. It must be used only by qualified personnel and only on the machine where it has been installed and initialised by qualified safety personnel in

accordance with these operating instructions.

If the device is used for any other purposes or modified in any way — also during mounting

and installation — any warranty claim against SICKAG shall become void.

2.4 General safety notes and protective measures

Safety notes



WARNING

Please observe the following procedures in order to ensure the correct and safe use of the

miniTwin2 safety light curtain.

 The national/international rules and regulations apply to the installation, commis-

sioning, use and periodic technical inspections of the safety light curtain, in particular:

– Machinery Directive

– Work Equipment Directive

– the work safety regulations/safety rules

– other relevant health and safety regulations

Manufacturers and operators of the machine on which the safety light curtain is used are responsible for obtaining and observing all applicable safety regulations and rules.

 The notices, in particular the test regulations (see section 6.7 “Test notes” on page 56)

of these operating instructions (e.g. on use, mounting, installation or integration into the

existing machine controller) must be observed.

 Only qualified safety personnel may change the configuration (see section 2.1

“Qualified safety personnel” on page 8). Changes to the configuration of the devices can degrade the protective function. After every change to the configuration you must

therefore check the effectiveness of the protective device.

The person who makes the change is also responsible for the correct protective function

of the device.

 The tests must be carried out by qualified safety personnel or specially qualified and

authorised personnel and must be recorded and documented to ensure that the tests can be reconstructed and retraced at any time.

 The operating instructions must be made available to the operator of the machine

where the miniTwin2 safety light curtain is fitted. The machine operator is to be

instructed in the use of the device by qualified safety personnel and must be instructed to read the operating instructions.

Hazard due to lack of effectiveness of the protective device



WARNING

Subject to change without notice

The persons and parts of the body to be protected will not be detected on failure to

observe.

 The improper repair of the protective device can result in the loss of the protective

function. The protective device is only allowed to be repaired by the manufacturer or persons authorized by the manufacturer.

Chapter 2 Operating Instructions

Tab.1:

Overview on disposal

miniTwin2

On safety

 To meet the requirements of the relevant product standards (e.g. IEC 61496A1), the

external voltage supply for the devices (SELV) must be able to bridge a brief mains failure of 20 ms. The power supply must provide safe mains isolation (SELV/PELV) and have a current limit of max. 8 A. Power supplies according to EN 60204A1 satisfy this requirement. Suitable power supplies are available as accessories from SICK (see

section 10.6 “Accessories” on page 77).

2.5 Environmental protection

The miniTwin2 safety light curtain has been designed to minimise environmental impact. It uses only a minimum of power and natural resources.

 At work, always act in an environmentally responsible manner.

2.5.1 Disposal

Unusable or irreparable devices should always be disposed as per the applicable national regulations on waste disposal (e.g. European waste code 16 02 14).

Notes

 We would be pleased to be of assistance on the disposal of this device. Contact us.

 Information on the individual materials in the miniTwin2 is given in chapter 9 “Technical

specifications” on page 64.

by components



WARNING

2.5.2 Separation of materials

Only qualified safety personnel are allowed to separate materials!

Caution is required when dismantling devices. There is a risk of injuries.

Before you send the devices for appropriate recycling, it is necessary to separate the different materials in the miniTwin2.

 Separate the housing from the rest of the parts (in particular the circuit boards).

 Send the separated parts for recycling as appropriate (see Tab. 1).

Components Disposal

Product

Housing Metal recycling (aluminium)

Front screen Plastic recycling

Bracket Plastic recycling or metal recycling

(aluminium)

End cap Plastic recycling

Circuit boards Electronic recycling

Plug connector Electronic recycling

Connection plug and cable Electronic recycling

Packaging

Cardboard, paper Paper/cardboard recycling

Polyethylene packaging Plastic recycling

Subject to change without notice

Operating Instructions Chapter 3

miniTwin2

Product description

3 Product description

his chapter provides information on the special features and properties of the miniTwin2

T safety light curtain. It describes the construction and the operating principle of the device.

 Please read this chapter before mounting, installing and commissioning the device.

3.1 Special features

 small size, as a result very flexible in use on small systems or machines

 protective operation with Reset

 external device monitoring (EDM)

 status display with LEDs

 cascading of up to three miniTwin2 safety light curtains

 automatic beam coding, as a result low susceptibility to interference and high

availability, even with several systems mounted side by side

 cross-circuit monitoring



WARNING

Note the following requirements for cross-circuit monitoring!

 The cross-circuit monitoring only functions on devices that have a supplementary

revision number “(Rev. #)” in the Ident No. field on the type label.

 In case of combinations of several devices, all devices must have a supplementary

revision number “(Rev. #)” in the Ident No. field on the type label, otherwise cross-circuit monitoring will not function.

Subject to change without notice

Chapter 3 Operating Instructions

Fig.1:

Device components of

Twin-Stick

miniTwin2

Product description

3.2 Operating principle of the device

3.2.1 Device components

the miniTwin2 safety light curtain

Sender

Receiver

Sender

The miniTwin2 safety light curtain comprises two identical Twin Sticks of small size. Each Twin Stick contains both a sender unit and a receiver unit (Fig. 1). The two Twin Sticks are

mounted such that sender unit and receiver unit are opposite each other. The housing shape makes mounting intuitive.

Subject to change without notice

Operating Instructions Chapter 3

Fig.2:

Operating principle

E.g. reset button

Protective field width

OSSD1

OSSD2

Receiver

Sender

Receiver

Sender

Protective field height

E.g. EDM

miniTwin2

Product description

3.2.2 Operating principle safety light curtain

Between these two Twin Sticks is the protective field, defined by the protective field height and the protective field width.

The construction size determines the protective field height of the appropriate system. For the exact protective field height, please see Fig. 47 in section 9.3 “Dimensional drawings”

on page 68.

The protective field width is derived from the dimension of the light path between the Twin

Sticks and must not exceed the maximum permissible protective field width (see chapter 9 “Technical specifications” on page 64).

miniTwin2 safety light curtain

The two Twin Sticks automatically synchronise themselves optically. Each Twin Stick has an OSSD and a so-called multifunction connection. The OSSDs are integrated into the

machine controller. It is possible to connect either a reset button or external device monitoring (EDM) to the multifunction connections.

Prerequisites for the protective function of the miniTwin2 safety light curtain

The miniTwin2 safety light curtain operates correctly as a protective device only if the

following conditions are met:

 The control of the machine must be electrical.

 It must be possible to achieve a safe state on the machine at any time.

 The miniTwin2 safety light curtain must be mounted in such a way that objects

penetrating into the hazardous area are safely identified.

 The reset button must be fitted outside the hazardous area such that it cannot be

operated by a person working inside the hazardous area. When operating the reset button, the operator must have full visual command of the hazardous area.

 The statutory and local rules and regulations must be observed when installing and

using the device.

Subject to change without notice

Chapter 3 Operating Instructions

Fig.3:Cascading of the

Guest

Host

miniTwin2

miniTwin2 safety light curtain

Product description

3.2.3 Cascading

To provide effective presence detection a maximum of three miniTwin2 can be connected in series as “cascade”.

The device connected to the control cabinet is the main sensor, called host. The subsequent sensors are called guest 1 and guest 2. On the host you can configure the Reset

and EDM functions.



WARNING

The miniTwin2 can be connected together as required and form, without configuration, a functional cascaded system. After disconnecting cascaded systems to form individual

systems, the individual miniTwin2 can also be used as a standalone devices without configuration.

Whether a device is used as a cascaded device or as a standalone device is defined by the connection plug.

Check the effectiveness of the protective device after any change to a system using the test rod!

Check the effectiveness of the protective device as described in section 6.7 “Test notes”

on page 56.

Benefits of cascading

 no additional external circuitry required, quick to connect

 resolution and protective field height may differ among the individual systems

Limits of cascading

 The maximum protective field width must be guaranteed for each individual system!

 The maximum cable length between two cascaded systems must not exceed 3 metres.

 You must maintain a minimum distance between the protective fields on the miniTwin2

host and miniTwin2 guest 2 (see section 4.1.3 “Minimum distance for cascaded systems” on page 26).

Subject to change without notice

Operating Instructions Chapter 3

Fig.4:

Hazardous point

Fig.6:

Access protection

miniTwin2

Product description

3.3 Application examples

protection using a miniTwin2 safety light curtain (left)

Fig. 5: Hazardous area protection using a miniTwin2 safety light curtain (right)

using a miniTwin2 safety light curtain

Subject to change without notice

Chapter 3 Operating Instructions

Fig.7:

Status indicators on

Bi-colour LEDs

120mm240mm180mm300mmBi-colour LEDs

miniTwin2

Product description

3.4 Status indicators

the miniTwin2

Green/red

Notes

 Illuminated LEDs indicate the status of the miniTwin2 safety light curtain. Flashing LEDs

prompt you to take an action.

 Fig. 7 shows the two smallest protective field heights 120 and 180 mm. In the case of

safety light curtains with larger protective fields (240 mm, 300 mm etc.) the LED displays are always in the middle of the protective field. These miniTwin2 have further

bi-colour LEDs that are fitted every 60 mm above and below the status indicators.

Subject to change without notice

Operating Instructions Chapter 3

Tab.2:

Meaning of the status

miniTwin2

Product description

indicators

LED Display Comment

OUT  Green/red

Bi-colour LED illuminates green, if protective field un-

occupied (OSSD on)

Bi-colour LED illuminates red, if protective field infringed (OSSDs off)

 Orange External device monitoring configured EDM

 Orange For the configuration of EDM on the first OSSD status

change, the safety light curtain expects a change from

4 V to 0 V on the multifunction input.

Or:

In connection with the ERR LED  Red: External device

monitoring signalling faulty contactor

 White External communication active (e.g. for service) COM

 White No optical communication to another Twin Stick

Or:

Feedback on the deactivation of the configuration

 Orange Reset configured RES

 Orange Reset required

Or:

In connection with the ERR LED  Red and the EDM LED  Orange: Error in the configuration or the cabling.

Please refer to chapter 8 on page 62.

 Red Protective field infringed ERR

1, 2, 3, 4, 5

 Red Error. Please refer to chapter 8 on page 62.

 Blue Indication of the quality of the alignment. Please refer to

section 6.2 on page 53.

 Blue In connection with the ERR LED  Red: Display of an

error. Please refer to chapter 8 on page 62.

Or:

Feedback on the deactivation of the configuration

Subject to change without notice

Chapter 3 Operating Instructions

Fig.8:

Configurable functions

K1K2k1k2Reset button

OSSD1

OSSD2

EDM24V DC0V

miniTwin2

Product description

3.5 Configurable functions

his section describes the functions of the miniTwin2 safety light curtain that can be

configured.

Test the protective device after any changes!



ARNING

Changes to the configuration of the devices can degrade the protective function. After every change to the configuration you must therefore check the effectiveness of the

protective device (see section 6.7 “Test notes” on page 56).

The person who makes the change is also responsible for the correct protective function of

the device.

Reset and external device monitoring can be configured on the miniTwin2 safety light

curtain.

 Reset is configured by activating the reset button with a specific cycle (see section 6.5

“Configuration of the Reset function” on page 55).

 If the input is wired correctly to the contactors, the external device monitoring (EDM) is

configured automatically the first time the OSSDs are switched (see sections 5.5 “External device monitoring (EDM)” on page 49 and 6.6 “Configuration of the external

device monitoring (EDM)” on page 56).

Subject to change without notice

Operating Instructions Chapter 3

Fig.9:

Outline drawing of the

miniTwin2

protective operation

Note

Product description

3.5.1 Reset

The dangerous state of the machine () is interrupted if the light path is broken (), and is not re-enabled ( ) until the operator presses the reset button.

Do not confuse reset and the restart interlock with the starting interlock on the machine. The starting interlock prevents the machine starting after switching on. Reset and the

restart interlock prevent the machine starting again after an error or an interruption of the light path.

 You can only implement a restart interlock via an external machine restart interlock:

The miniTwin2 has no control over the restart.

 You can implement a reset using the Reset function on the miniTwin2:

The miniTwin2 controls the machine start.



WARNING

Ensure on the usage of the Reset function that an erroneous start-up cannot result in a dangerous situation!

Subject to change without notice

Chapter 3 Operating Instructions

Tab.3:

Permissible

miniTwin2

Product description

The possible combinations of reset and restart interlock are shown in the following table:

configuration of the restart interlock



WARNING

Reset function of

the miniTwin2

Deactivated Deactivated Only if the safety light curtain cannot be stood

Deactivated Activated All

Activated Deactivated Only if the safety light curtain cannot be stood

Activated Activated All (see “Reset and restart interlock on the

It is imperative you configure the application with restart interlock if it is possible to stand behind the safety light curtain!

The miniTwin2 is unable to verify if the restart interlock of the machine is operable. If in applications in which it is possible to stand behind the safety light curtain you deactivate

both the internal Reset function and the external restart interlock, you will place the machine operator in acute danger.

Restart interlock of

the machine

Permissible

application

behind. Observe EN 60204A1!

Note: It must be ensured that with the power supply to the machine switched on, access to

the hazardous area is only possible via the active protective field on the safety light

curtain.

If this condition is not met, e.g. during main-

tenance work on the machine with a side cover open, it is imperative the supply of

power to the machine is interrupted!

machine” further below).

Notes

Recommendation

 The electrical connection of the reset button is described in section 5.4 “Reset button”

on page 48.

 Section 6.5 “Configuration of the Reset function” on page 55 describes how to con-

figure the function.

Reset and restart interlock on the machine

If you activate reset on the miniTwin2 and implement a restart interlock on the machine,

then reset and restart interlock each have a dedicated button.

After actuation of the reset button …

 the miniTwin2 activates the output signal switching devices.

 the safety light curtain switches to green.

Only the external restart interlock prevents the machine from restarting. After pressing the reset button for the miniTwin2, the operator must also press the restart button for the

machine. If the reset button and the restart button are not pressed in the specified sequence, the dangerous state remains disrupted.

The reset button prevents the accidental and inadvertent operation of the external restart button. The operator must first acknowledge the safe state with the reset button.

Subject to change without notice

Operating Instructions Chapter 3

miniTwin2

Product description

3.5.2 External device monitoring (EDM)

The EDM checks if the contactors actually de-energize when the protective device responds. If you activate external device monitoring, then the miniTwin2 checks the

ontactors after each interruption to the light path and prior to the machine restart. The

c EDM can so identify if one of the contactors has welded, for instance. In this case the

external device monitoring places the system in a safe operational state. The OSSDs are

ot re-activated in this case.

Notes

 The electrical connection for the external device monitoring is described in section 5.5

“External device monitoring (EDM)” on page 49.

 Section 6.6 “Configuration of the external device monitoring (EDM)” on page 56

describes how to configure the function.

Subject to change without notice

Chapter 4 Operating Instructions

miniTwin2

Mounting

4 Mounting

his chapter describes the preparation and completion of the mounting of the miniTwin2

T safety light curtain. The mounting requires two steps:

 determining the necessary minimum distance

 mounting using the available brackets (see section “Safety light curtains” in the SICK

product catalogue “Industrial Safety Systems” or www.sick.com)

The following steps are necessary after mounting:

 completing the electrical connections (chapter 5)

 alignment of the miniTwin2 safety light curtain (section 6.2)

 testing the installation (section 6.7)

4.1 Determining the minimum distance

The safety light curtain must be mounted with sufficient minimum distance:

 from the hazardous point

 from reflective surfaces



WARNING

No protective function without sufficient minimum distance!

The reliable protective effect of the safety light curtain depends on the system being mounted with the correct minimum distance from the hazardous point.

4.1.1 Minimum distance from the hazardous point

A minimum distance must be maintained between the safety light curtain and the

hazardous point. This ensures that the hazardous point can only be reached after the dangerous state of the machine has been completely stopped.

The minimum distance as per EN ISO 13855 and EN ISO 13857 depends on:

 stopping/run-down time of the machine or system

(the stopping/run-down time is shown in the machine documentation or must be determined by taking a measurement.)

 response time of the entire protective device, e.g. miniTwin2 consisting of host and

guest (response times see 9.1 “Data sheet” on page 64)

 reach or approach speed

 resolution of the safety light curtain and/or beam separation

 other parameters that are stipulated by the standard depending on the application

Subject to change without notice

Operating Instructions Chapter 4

Fig.10:

Minimum distance

Hazardous

Distance to avoid standing behind



Minimum distance S (D

)

Protective field height

miniTwin2

Mounting

Under the authority of OSHA and ANSI the minimum distance as specified by ANSI B11.19:2003C04, Annex D and Code of Federal Regulations, Volume 29, Part 1910.217 … (h) (9) (v) depends on:

 stopping/run-down time of the machine or system (the stopping/run-down time is shown

in the machine documentation or must be determined by taking a measurement.)

 response time of the entire protective device, e.g. miniTwin2 consisting of host and

guest (response times see 9.1 “Data sheet” on page 64)

 reach or approach speed

 other parameters that are stipulated by the standard depending on the application

from the hazardous point

Note

point

How to calculate the minimum distance S according to EN ISO 13855 and EN ISO 13857:

The following calculation shows an example calculation of the minimum distance.

Depending on the application and the ambient conditions, a different calculation may be necessary.

 First, calculate S using the following formula:

S = 2000 × T + 8 × (d – 14) [mm]

Where …

T = Stopping/run-down time of the machine

+ Response time of the protective device after light path interruption [s]

d = Resolution of the safety light curtain [mm]

S = Minimum distance [mm]

The reach/approach speed is already included in the formula.

 If the result S is  500 mm, then use the determined value as the minimum distance.

 If the result S is > 500 mm, then recalculate S as follows:

S = 1600 × T + 8 × (d – 14) [mm]

 If the new value S is > 500 mm, then use the newly determined value as the minimum

distance.

 If the new value S is  500 mm, then use 500 mm as the minimum distance.

Subject to change without notice

Chapter 4 Operating Instructions

miniTwin2

Mounting

Example:

Stopping/run-down time of the machine = 290 ms

esponse time after light path interruption = 30 ms

Resolution of the safety light curtain = 14 mm T = 290 ms + 30 ms = 320 ms = 0.32 s

S = 2000 × 0.32 + 8 × (14 – 14) = 640 mm S > 500 mm, for this reason:

S = 1600 × 0.32 + 8 × (14 – 14) = 512 mm

How to calculate the minimum distance Dsaccording to ANSI B11.19:2003C04, Annex D and Code of Federal Regulations, Volume 29, Part 1910.217 … (h) (9) (v):

Note

The following calculation shows an example calculation of the minimum distance.

Depending on the application and the ambient conditions, a different calculation may be necessary.

 Calculate D

= Hs× (Ts+ Tc+ Tr+ T

using the following formula:

) + D

Where …

= The minimum distance in inches (or millimetres) from the hazardous point to the

protective device

= A parameter in inches/second or millimetres/second, derived from data on

approach speeds of the body or parts of the body. Often 63 inches/second (1600 mm/second) is used for H

= Stopping/run down time of the machine tool measured after the final control

element

= Response time of the control system

= Response time of the entire protective device after light path interruption

= Additional time to compensate for the lack of brake wear monitoring

Note

Any additional response times must be accounted for in this calculation.

= An additional distance added to the overall minimum distance required. This

value is based on intrusion toward the hazardous point prior to actuation of the

electro-sensitive protective equipment (ESPE). Values range from 0.25 inches to 48 inches (6 to 1220 millimetres) or more depending on application.

Example:

For perpendicular protection using an opto-electronic protective device with an

object sensitivity (effective resolution) less than 2.5 inches (64 millimetres), D

can be approximated based on the following formula:

(inches) = 3.4 × (effective resolution – 0.276), but not less than 0.

Subject to change without notice

Operating Instructions Chapter 4

Fig.11:

Minimum distance to

Fig.12:

Graph, minimum

Reflective surface

Minimum distance a

Distance

Field of view

Distance D [m]

Minimum distance a [mm]

miniTwin2

Mounting

4.1.2 Minimum distance to reflective surfaces

The light beams from the safety light curtain may be deflected by reflective surfaces. This can result in failure to identify an object.

All reflective surfaces and objects (e.g. material bins) must therefore be located at a minimum distance a from the protective field of the system. The minimum distance a depends on the distance D between the Twin Sticks.

reflective surfaces

distance from reflective surfaces

Note

The field of view of the sender and receiver optics is identical.

How to determine the minimum distance from reflective surfaces:

 Determine the distance D [m] between the Twin Sticks.

Up to a protective field width of 3 m, the minimum distance is at least 262 mm.

 For a protective field width of more than 3 m, read the minimum distance a [mm] from

the graph:

Subject to change without notice

Or:

 Calculate the minimum distance for a protective field width of more than 3 m using the

formula

a [mm] = tan 5° × D [m] × 1000

Example:

a = tan 5° × 4 m × 1000

a = 349.95 mm ~ 350 mm

Chapter 4 Operating Instructions

Fig.13:

Minimum distance

Fig.14:

Diagram minimum

a min.

529

Guest

Host

Guest2Guest

Guest

a min.

529

Guest

a min.

529

Distance D [m]

Minimum distance a [mm]

miniTwin2

Mounting

4.1.3 Minimum distance for cascaded systems

In a cascaded system with a protective field width of up to 3 m you must maintain a minimum distance of 529 mm between the host and guest 2 during mounting.

between host and guest 2 (mm)

 For a protective field width of more than 3 m, read the minimum distance a [mm] from

the graph:

distance between host and guest 2

Or:

 Calculate the minimum distance for a protective field width of more than 3 m using the

formula

a [mm] = tan 10° × D [m] × 1000

Example:

a = tan 10° × 4 m × 1000

a = 705.31 mm ~ 706 mm

Subject to change without notice

+ 58 hidden pages

SICK miniTwin2 Original Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

1 About this document

1.1 Function of this document

1.2 Target group

1.3 Scope

1.4 Information depth

1.5 Abbreviations

1.6 Symbols used

2 On safety

2.1 Qualified safety personnel

2.2 Applications of the device

2.3 Correct use

2.4 General safety notes and protective measures

2.5 Environmental protection

2.5.1 Disposal

2.5.2 Separation of materials

3 Product description

3.1 Special features

3.2 Operating principle of the device

3.2.1 Device components

3.2.2 Operating principle safety light curtain

3.2.3 Cascading

3.3 Application examples

3.4 Status indicators

3.5 Configurable functions

3.5.1 Reset

3.5.2 External device monitoring (EDM)

4 Mounting

4.1 Determining the minimum distance

4.1.1 Minimum distance from the hazardous point

4.1.2 Minimum distance to reflective surfaces

4.1.3 Minimum distance for cascaded systems