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�...
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�...
► For applications in the food industry contact your ifm branch office to check the compatibility of the materials of the photoelectric safety sensors with the chemicals used�...
• 1 copy operating instructions photoelectric safety sensors, reference no� 704701� 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� •...
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 minimum safety 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�...
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► Install the photoelectric safety sensor at a distance that is greater or equal to the minimum safety distance (S) so that the hazardous area (A) can 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...
6.3 Vertical 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) This formula applies to minimum safety distances (S) between 100 and 500 mm�...
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 using the supplied mounting accessories so that they are exactly opposite each other� ►...
6.4.1 Optical alignment T = transmitter; R = receiver The indication LEDs of the receiver help to correctly align the photoelectric safety sensors� 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 Receiver detects all light beams...
6.5 Distance of the reflecting surfaces Reflective surfaces close to photoelectric safety sensors can disable the safety function of the system� The minimum distance (D) depends on the protective 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 1100 1000 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 mirrors can be used (available as accessory)� By using mirrors the light beam emitted by the transmitter can be sent via several access sides� ►...
Range 1 Configuration protected area width Functional earth For information about available sockets/connectors see: www.ifm.com → Products → Accessories The protected area width (range) to be used is configured via range 0 and range 1� Configuration protected area width (range)
– Functional earth For information about available sockets/connectors see: www.ifm.com → Products → Accessories Note: Lay the cables of the photoelectric safety sensors separately from sources of interference such as power lines� ► Connect the transmitter and the receiver to the functional earth�...
8 Operating modes The different operating modes of the safety light curtains of the OY series can be set via the respective connections to the 8-pole plug of the receiver� Operating modes Connections pin 4 pin 5 pin 6 Automatic...
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� Verify if this is compatible with 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 contactors External contactors can be integrated in the automatic or manual operating mode� The contactors have to be connected in series between the supply voltage and pin 4 of the receiver (→ 8 Operating modes / table, fig. B ). With manual function a start button has additionally to be switched in series (→...
9.1 LED states The blue LED is lit when the signal is weak (→ 6.5.1 Optical alignment). 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,...
10.1.1 The safe state The safe state is when the output is switched off (zero-current state: logic "0") of min� one of the outputs (OSSDs)� If one of the outputs is switched off, the subsequent safety-related logic unit must bring the complete system into the state defined as safe� 10.1.2 The switched state In switched state the receiver provides a current of 24 V DC (logic "1") to both outputs�...
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 connections pins 2 and 4 pulses pin 2/4 3/4 consecutive Internal fault Send device to ifm branch office for repair� pulses...
14 Maintenance, repair and disposal • Maintain the optoelectronic 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 front panes 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 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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