IFM OY4**S Series User manual

704860 / 04 12 / 2018
Original operating instructions
Photoelectric safety sensors
(safety light curtain / safety light grid)
with IP69K protective tube
Protected area width (range) 0...15 m
OY4xxS
UK

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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

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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

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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.

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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.

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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.

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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.

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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).

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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.

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