IFM Electronic OY423S, OY421S, OY422S Operating Instructions Manual

Original operating instructions

Photoelectric safety sensors

(safety light curtain / safety light grid)

with IP69K protective tube

Protected area width (range) 0...15 m

OY4xxS

704860 / 04 12 / 2018

Contents

1 Preliminary note ................................................................................................... 4

1.1 Symbols used ................................................................................................4

1.2 Warning signs used .......................................................................................4

2 Safety instructions ...............................................................................................5

2.1 Safety-related requirements regarding the application .................................. 6

3 Items supplied......................................................................................................7

4 Functions and features ........................................................................................7

5 Function ............................................................................................................... 8

6 Installation............................................................................................................9

6.1 Installation instructions ..................................................................................9

6.2 Calculation of the minimum safety distance ................................................ 11

6.3 Vertical installation of the safety light curtains / light grids ........................... 12

6.3.1 Safety light curtains: resolution 30 mm ...............................................12

6.3.2 Safety light grids 2, 3 and 4 beams ....................................................13

6.4 Horizontal installation of the safety light curtains .........................................13

6.5 Fixing and optical alignment ........................................................................14

6.5.1 Optical alignment ................................................................................ 14

6.6 Distance of reflective surfaces .....................................................................15

6.7 Multiple systems ..........................................................................................17

6.8 Use of corner mirrors ................................................................................... 18

7 Electrical connection .......................................................................................... 19

7.1 Wiring diagram transmitter...........................................................................19

7.2 Wiring diagram receiver ...............................................................................20

8 Operating modes ...............................................................................................21

8.1 Automatic operation ..................................................................................... 22

8.2 Manual operation ......................................................................................... 22

8.3 Connection of external feedback contacts ..................................................23

8.4 Test function .................................................................................................23

8.4.1 Internal test function ...........................................................................23

9 Operating and display elements ........................................................................24

9.1 LED indicators for optical alignment ............................................................24

9.1.1 Alignment in the automatic mode .......................................................24

9.1.2 Alignment in the manual mode ...........................................................25

9.2 LED states ...................................................................................................26

10 Operation ......................................................................................................... 27

10.1 Switching state of the outputs ....................................................................27

10.1.1 The safe state ................................................................................... 27

10.1.2 The switched state ............................................................................ 27

10.1.3 Interface classification ......................................................................27

10.2 Functional test of the safety light curtains .................................................28

11 Scale drawing ..................................................................................................29

11.1 Safety light curtain .....................................................................................29

11.2 Safety light grid ..........................................................................................30

11.2.1 Position of the light beams ................................................................31

12 Technical Data .................................................................................................32

12.1 Heating ......................................................................................................33

12.2 Safety light curtains: 30 mm resolution ......................................................33

12.3 Safety light curtains: 40 mm resolution ......................................................34

12.4 Safety light grids 2, 3 and 4 beams ...........................................................34

13 Troubleshooting ...............................................................................................34

13.1 Fault diagnosis transmitter ........................................................................34

13.2 Fault diagnosis receiver .............................................................................35

14 Maintenance, repair and disposal .................................................................... 36

15 Terms and abbreviations ..................................................................................37

16 Annex ............................................................................................................... 38

16.1 Check list ...................................................................................................38

1 Preliminary note

The instructions are part of the unit. They are intended for authorised persons according to the EMC and low voltage directives and safety regulations. The instructions contain information about the correct handling of the product. Read the instructions before use to familiarise yourself with operating conditions, installation and operation. Adhere to the safety instructions.

1.1 Symbols used

► Instructions > Reaction, result → Cross-reference

LED off LED on LED flashes

Important note Non-compliance can result in malfunction or interference.

Information Supplementary note.

Access prevention hand protection

Access prevention bodies or parts of bodies

Primary guarding bodies or parts of bodies

Access prevention body protection

1.2 Warning signs used

WARNING

Warning of serious personal injury. Death or serious irreversible injuries may result.

2 Safety instructions

• Follow the operating instructions.

• In case of non-observance of notes or standards, specially when tampering with and / or modifying the unit, any liability and warranty is excluded.

• The unit must be installed, connected and put into operation by a qualified electrician trained in safety technology.

• The applicable technical standards for the corresponding application must be complied with.

• For the installation the standards EN 60204, EN 999 and ISO 13855 have to be observed.

• In case of malfunction of the unit please contact the manufacturer. Tampering with the unit is not allowed.

• Disconnect the unit externally before handling it. Disconnect all relay load circuits that are supplied independently.

• After set-up the system has to be subjected to a complete function check.

• Only use the unit under the specified operating conditions (→ 12 Technical data). In case of special operating conditions please contact the manufacturer.

• In case of any questions concerning safety - if required - contact the safety expert in charge of your country.

WARNING

In case of improper handling of the product, the safety and physical integrity of operators and machinery cannot be guaranteed.

Death or serious irreversible injuries may result.

► Observe all notes on installation and handling in these instructions. ► The photoelectric safety sensors must only be used under the specified

operating conditions and in accordance with use as prescribed below.

2.1 Safety-related requirements regarding the application

It must be ensured that the safety requirements of the respective application correspond to the requirements stated in these instructions.

Observe the following requirements:

► Adhere to the specified operating conditions (→ 12 Technical data). Use of the

photoelectric safety sensors in the vicinity of ionising radiation is not permitted. Furthermore, their use in the vicinity of chemically and biologically active media is to be checked, if necessary.

► Material resistance tests of the photoelectric safety sensors with a protective

tube have been carried out for applications in the food industry. For the tested chemicals see the respective ECOLAB certificate or contact your ifm branch office.

► Adhere to the principle of normally closed operation for all external safety

circuits connected to the system.

► If the photoelectric safety sensors go into the state defined as safe due to an

internal fault, measures have to be taken to maintain the safe state when the installation resumes operation.

► Replace damaged units.

The protective function of the photoelectric safety sensors is only ensured with the following conditions:

• The machine control can be electrically controlled and the hazardous machine motion can be stopped immediately at any time of the operation cycle.

• There is no danger for machine operators due to ejection of materials or machine parts.

• The hazardous area is only accessible via the protected area.

3 Items supplied

• 2 photoelectric safety sensors (1 transmitter and 1 receiver) with IP69K protective tube

• 1 operating instructions photoelectric safety sensors with IP69K protective tube, reference number 704860

If one of the above-mentioned components is missing or damaged, please contact one of the ifm branch offices.

4 Functions and features

transmitter (T) receiver (R)

P = protected area; I = protected area width (range) H = protected area height

The OY4xxS safety light curtains / light grids are multi-beam optoelectronic protective devices to IEC 61496 and consist of one transmitter and one receiver.

5 Function

The protected area (P) is generated between the transmitter and the receiver and is defined by the protected area height (H) and the protected area width (range) (I).

The protected area height is the height protected by the safety light curtain / safety light grid. It depends on the design (→ 12 Technical data). If the safety light curtains are installed horizontally, this value indicates the depth of the protected area.

The protected area width (range) is the maximum distance between transmitter

and receiver (→ 12 Technical data).

If the protected area is clear, the two outputs (OSSDs) of the receiver are active. If an object (O) with a diameter greater than or equal to the resolution (d) enters

the protected area, the outputs are switched off. The resolution (d) (detection capability) of the safety light curtain depends on the

lens diameter (B) and the lens distance (C) and remains constant at all application conditions.

transmitter (T) receiver (R)









O = object C = lens distance B = lens diameter

d = resolution

To ensure that an object (O) is reliably detected in the protected area the dimensions of the object (O) must be at least as great as the resolution (d).

6 Installation

6.1 Installation instructions

The following conditions are to be ensured before installation of the photoelectric safety sensors:

• The degree of protection of the electro-sensitive equipment (ESPE) has to correspond with the risk assessment of the machine to be monitored.

• The safety system ensures a safety function and is not required for the operation of a machine.

• It must be possible to stop any hazardous motion of the machine immediately. In this respect the shutdown delay of the machine has to be determined.

• The object to be detected must be greater than or equal to the resolution of the photoelectric safety sensor.

Install the photoelectric safety sensors so that the hazardous area can only be accessed via the protected area. Depending on the application other mechanical protective equipment may be necessary.

The operating conditions at the mounting location must not affect the functioning of the photoelectric safety sensors. Please note especially:

• The transmitter and the receiver must not be affected by intensive light sources (emitters, sunlight etc.).

• The ambient temperature must be within the range indicated (→ 12 Technical data).

• Fogging of the lenses due to considerable temperature fluctuations can affect the functioning of the photoelectric safety sensors. Take appropriate measures to prevent this.

• Certain operating conditions can affect the functioning of the photoelectric safety sensors. For mounting locations where fog, rain, smoke or dust may occur, it is recommended to take appropriate measures.

• The standards EN 999 and ISO 13855 must be adhered to.

Observe the following illustrations for correct installation of the photoelectric safety sensors.

Correct installation

Wrong installation

6.2 Calculation of the minimum safety distance



There must be a minimum safe distance between the photoelectric safety sensor and the point of danger. This distance must be ensured so that the point of danger cannot be accessed before the hazardous state of the machine has been stopped.

► Install the photoelectric safety sensor at a distance

that is greater than or equal to the minimum safety distance (S) so that the hazardous area (A) can







A = hazardous area H = protected area height

S K t t

Total response time of the protective equipment, from release to switching off s

Total response time of the machine, from the stop signal to switching off or to

Speed of approach of the object towards the hazardous area mm/s

passing into the state defined as safe

only be accessed after complete standstill of the hazardous machine motion.

According to the European Standard EN 999:2008 the

following formula is to be used to calculate the minimum safety distance (S):

S = K (t1 + t2) + C

C = 8 (d - 14)

S = minimum safety distance C = additional distance

Minimum safety distance mm

C d

Additional distance mm

Resolution (detection capacity) mm

Non-compliance with the minimum safety distance may lead to restrictions to or loss of the safety function.

Application example:







A = hazardous area S = min. safety distance

6.3 Vertical installation of the safety light curtains / light grids

6.3.1 Safety light curtains: resolution 30 mm

These designs are suitable for access prevention of hands (hand protection).

They must not be used for finger protection!

The minimum safety distance (S) is determined using the following formula:

S = 2000 (t1 + t2) + 8 (d - 14)

This formula applies to minimum safety distances (S) between 100 and 500 mm. If the calculation shows that S is greater than 500 mm, the distance can be reduced to a minimum value of 500 mm by using the following formula:

S = 1600 (t1 + t2) + 8 (d - 14)







A = hazardous area H = height

S = min. safety distance G = reference level

If due to the special configuration of the machine it should be possible to reach the hazardous area from above, the highest light beam of the safety light curtain should be at a height (H) (measured from the reference level (G)) whose value is determined to the specifications in ISO 13855.

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