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 ������������������������������������������������...
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10 Operation ���������������������������������������������������������������������������������������������������������26 10�1 Switching state of the outputs ��������������������������������������������������������������������26 10�1�1 The safe state �����������������������������������������������������������������������������������26 10�1�2 The switched state ����������������������������������������������������������������������������26 10�1�3 Interface classification ����������������������������������������������������������������������26 10�2 Functional test of the safety light curtains �������������������������������������������������27 11 Scale drawing ��������������������������������������������������������������������������������������������������28 12 Technical data ��������������������������������������������������������������������������������������������������29 12�1 Heating ������������������������������������������������������������������������������������������������������30 12�2 Safety light curtains: 14 mm resolution ������������������������������������������������������30 13 Troubleshooting �����������������������������������������������������������������������������������������������30...
1 Preliminary note The instructions are part of the unit� They are intended for authorised persons according to the EMC and Low Voltage Directive 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�...
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�...
► 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�...
• 1 operating instructions photoelectric safety sensors with IP69K protective tube, reference number 704858 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;...
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� It depends on the design (→...
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� •...
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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� ►...
Application example: A = hazardous area S = min� safety distance 6.3 Installation of the safety light curtains 6.3.1 Safety light curtains resolution 14 mm These designs are suitable for access prevention of fingers (finger protection)� The minimum safety distance (S) is determined using the following formula: S = 2000 (t ) + 8 (d - 14)
6.4 Fixing and optical alignment Correct alignment of the transmitter and the receiver is decisive for the proper function of the photoelectric safety sensors� ► Install the transmitter and the receiver so that they are exactly opposite each other� 6.4.1 Optical alignment T = transmitter;...
6.5 Distance of reflective surfaces Reflective surfaces close to photoelectric safety sensors can disable the safety function of the system� The minimum distance (D) depends on the protected area width (I) taking into consideration the projection and receiving angles� The minimum distance (D) between reflective surfaces and the protected area (P) must be observed�...
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Minimum distance to reflective surfaces D = minimum distance in [mm]; I = protected area width (range) [m]...
6.6 Multiple systems The use of several safety light curtains can lead to malfunction and disable the protective function� The safety light curtains are to be installed so that the beam sent by the transmitter of a system can only be detected by the respective receiver� The following important rules for installation are to be observed to avoid mutual interference of several systems: Arrangement A...
6.7 Use of corner mirrors To protect and monitor hazardous areas with access from several sides one or several corner mirrors can be used (available as accessory)� By using mirrors the light beam emitted by the transmitter can be sent via several access sides� ►...
7 Electrical connection ► Disconnect power� Also disconnect any independently supplied relay load circuits� The nominal voltage is 24 V DC� This voltage may vary between 19�2 V and 28�8 V� In case of a single fault the operating voltage must not exceed a maximum of 28�8 V DC�...
7.2 Wiring diagram receiver Core colours Name Type Description white OSSD1 Output Static safety-related output 1 brown 24 V DC – Operating voltage 24 V DC green OSSD2 Output Static safety-related output 2 yellow K1_K2/Restart Input External feedback contacts grey SEL_A Input Safety light curtains operating mode...
8 Operating modes The different operating modes of the safety light curtains of the OY4xxS series can be set via the respective connections to the receiver� Operating modes Connections yellow grey pink A Automatic K1_K2 SEL_A SEL_B L + L Connection to: Connection to: Connection to:...
8.1 Automatic operation If the safety light curtains are used in the automatic mode, monitored start is not possible� The safety light curtains automatically return to operation with clear protected area, the outputs (OSSDs) are activated� Check if this is compatible with the risk analysis of your machine� In the automatic mode the OSSD1 and OSSD2 outputs follow the status of the safety light curtains: Protected area clear...
8.3 Connection of external feedback contacts External feedback contacts can be integrated in the automatic or manual operating mode� The feedback contacts have to be connected in series between the operating voltage and K1_K2 / Restart (→ 8 Operating modes / table, fig. B). With manual function a start button has additionally to be switched in series (→...
9 Operating and display elements transmitter receiver 1: LED 3 colours (red/green/orange) 2: LED 2 colours (yellow/blue) 3: LED 2 colours (red/green) 9.1 LED indicators for optical alignment The indication LEDs of the receiver help to correctly align the photoelectric safety sensors�...
9.1.2 Alignment in the manual mode In the manual operating mode the yellow LED lights instead of the green one� The light curtain will then wait for the manual release� Receiver 2-colour LED 2-colour LED Description green yellow blue Receiver does not detect any light beams Receiver detects some light beams Receiver detects all light beams with a weak signal...
9.2 LED states The blue LED is lit when the signal is weak (→ 9.1). Transmitter Receiver Description green orange green yellow blue Activating the system, input test Fault (→ 13 Troubleshooting) Test condition Normal operating conditions Protected area interrupted, outputs deactivated Protected area clear, outputs deactivated,...
10 Operation 10.1 Switching state of the outputs The safety light curtains have two outputs (OSSDs) on the receiver; the status depends on the condition of the protected area� All short-circuits between the outputs or between an output and the current supply (24 V DC or 0 V DC) are detected by the safety light curtains as a fault�...
For information about available test rods see: www.ifm.com → Products → Accessories. ► Let the test object enter the protected area and move it slightly downwards� First of all in the centre and then close to the transmitter and the receiver�...
12 Technical data Conforms to the requirements of: Type 4 IEC 61496-1, SIL 3 IEC 61508, SILcl 3 IEC 62061, ISO 13849-1:2015 category 4 PL e Electrical design DC / PNP Operating voltage 24 DC (19�2…28�8) Current consumption Transmitter [mA] 42 Receiver [mA] 83 Outputs (OSSDs)
(→ 9 Operating and display elements). For a detailed fault description see the following tables� 13.1 Fault diagnosis transmitter Possible cause Troubleshooting 2 consecutive Faulty connection Check the white and green cores� pulses 3/4 consecutive Internal fault Send device to ifm branch office for repair� pulses...
14 Maintenance, repair and disposal • Maintain the photoelectric protective equipment in accordance with the applicable national regulations in effect within the requested intervals� The tests must be performed by qualified persons� • It is recommended to regularly clean the protective tube of the transmitter and the receiver�...
Safety Integrity Level SIL 1-4 to IEC 61508� The higher the SIL the lower the probability that a safety function will fail� Safety Integrity Level (to IEC 62061) claim limit Mission Time Test Interval Technical data and further information at www�ifm�com...
16 Annex 16.1 Check list This check list serves as help for setting up the safety light curtains� The requirements in this check list should to be met, however depending on the application and the directives / standards referred to� 1�...
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