IFM OY51 User manual

Operating instructions
Measuring light grids (10mm beam spacing)
OY51
11367152 / 0002 / 2021
GB

OY51 Measuring light grids (10mm beam spacing)
2
Contents
1 Preliminary notes............................................................. 3
1.1 Symbols used........................................................... 3
1.2 Warnings used.......................................................... 3
2 Safety instructions............................................................ 4
3 Intended use ................................................................ 5
4 Getting started............................................................... 6
5 Function.................................................................... 7
5.1 IO-Link................................................................ 7
6 Installation .................................................................. 8
6.1 Installation instructions.................................................... 8
6.1.1 Fastening .......................................................... 8
6.1.2 Optical alignment..................................................... 9
6.2 Multiple systems......................................................... 9
7 Electrical connection .......................................................... 11
7.1 Transmitter wiring diagram................................................. 11
7.2 Receiver wiring diagram................................................... 11
7.3 Synchronisation of transmitter and receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7.3.1 Synchronisation via ifm Y cable (EY5053 and EY5054) . . . . . . . . . . . . . . . . . . . . . . . 11
7.3.2 Synchronisation via standard sockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
7.3.3 Optical synchronisation................................................ 12
8 Operating and display elements.................................................. 14
8.1 Transmitter LED states................................................... 14
8.2 Receiver LED states...................................................... 14
9 Operation................................................................... 15
9.1 Switching mode (SIO mode) ............................................... 15
9.2 Operation with IO-Link master.............................................. 15
9.3 Process values.......................................................... 15
9.3.1 FBO – first beam occupied ............................................. 15
9.3.2 LBO – last beam occupied ............................................. 16
9.3.3 CBO – central beam occupied........................................... 16
9.3.4 NBO – number of beams occupied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
9.3.5 NCBO – number of consecutive beams occupied . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
9.3.6 Tolerance .......................................................... 17
10 Technical data............................................................... 18
10.1 Light grid with 10 mm beam spacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
11 Troubleshooting.............................................................. 19
11.1 Transmitter fault diagnostics ............................................... 19
11.2 Fault diagnosis receiver................................................... 19
12 Maintenance, repair and disposal ................................................ 20

Measuring light grids (10mm beam spacing) OY51
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1 Preliminary notes
You will find instructions, technical data, approvals and further information using the QR code on the
unit / packaging or at www.ifm.com.
1.1 Symbols used
Instruction
Reaction, result
Cross-reference
LED on
LED off
LED flashes
Important note
Non-compliance can result in malfunction or interference
Information
Supplementary note
1.2 Warnings used
WARNING
Warning of serious personal injury
wDeath or serious irreversible injuries may result.
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OY51 Measuring light grids (10mm beam spacing)
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2 Safety instructions
• The unit described is a subcomponent for integration into a system.
– The system architect is responsible for the safety of the system.
– The system creator undertakes to perform a risk assessment and to create documentation in
accordance with legal and normative requirements to be provided to the operator and user of
the system. This documentation must contain all necessary information and safety instructions
for the operator, the user and, if applicable, for any service personnel authorised by the
architect of the system.
• Read this document before setting up the product and keep it during the entire service life.
• The product must be suitable for the corresponding applications and environmental conditions
without any restrictions.
• Only use the product for its intended purpose (Ò Intended use).
• If the operating instructions or the technical data are not adhered to, personal injury and/or damage
to property may occur.
• The manufacturer assumes no liability or warranty for any consequences caused by tampering with
the product or incorrect use by the operator.
• Installation, electrical connection, set-up, operation and maintenance of the product must be
carried out by qualified personnel authorised by the machine operator.
• Protect units and cables against damage.

Measuring light grids (10mm beam spacing) OY51
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3 Intended use
2
1
1: Transmitter (T)
2: Receiver (R)
P: Detection zone
I: Detection field width
H: Detection field height
The OY51 light grids are multi-beam optoelectronic devices and consist of one transmitter and one
receiver.
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OY51 Measuring light grids (10mm beam spacing)
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4 Getting started
For fast set-up, carry out the following steps:
uFix the transmitter and the receiver Installation (Ò/8).
uConnect the receiver to an IO-Link master and establish a connection to the unit.
uSynchronise the transmitter and the receiver Synchronisation of transmitter and receiver
(Ò/11).
uSet the parameters of the unit via IO-Link.

Measuring light grids (10mm beam spacing) OY51
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5 Function
The detection zone (P) is generated between the transmitter and the receiver and is defined by the
detection field height (H) and the detection field width (I).
The detection field height is the height measured by the light grid. It depends on the design of the unit.
The detection field width is the maximum distance between transmitter and receiver.
As soon as an object (O) enters the detection zone, light beams are blocked depending on the object
size and position. Based on the number of consecutive beams blocked and the known beam spacing
(C), conclusions can for example be drawn about the object height.
2
1
1: Transmitter (T)
2: Receiver (R)
O: Object
C: Beam spacing
B: Lens diameter
The object diameter must be large enough to interrupt at least two light beams. Smaller objects
can lead to faulty measurement results.
Applications:
Detection types Description
Detection of an object in
motion
The object to be detected must have a compact shape and block a certain number of contiguous
light beams. The light barrier detects the previously stored object in any position.
Detection of a stationary
object
The object to be detected can have any shape. The light barrier only detects the object if it
occupies the same position in the detection field.
5.1 IO-Link
This unit has an IO-Link communication interface which enables direct access to process and
diagnostic data. In addition it is possible to set the parameters of the unit while it is in operation.
Operation of the unit via the IO-Link interface requires an IO-Link master.
With a PC, suitable IO-Link software and an IO-Link adapter cable, communication is possible while
the system is not in operation.
The IODDs necessary for the configuration of the unit, detailed information about process data
structure, diagnostic information, parameter addresses and the necessary information about the
required IO-Link hardware and software can be found at www.ifm.com.
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OY51 Measuring light grids (10mm beam spacing)
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6 Installation
6.1 Installation instructions
The operating conditions at the mounting location must not affect the functioning of the optoelectronic
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 (→Data sheet).
• Fogging of the lenses due to considerable temperature fluctuations can affect the functioning of the
optoelectronic sensors. Take appropriate measures to prevent this.
• Certain operating conditions can affect the functioning of the optoelectronic sensors. For mounting
locations where fog, rain, smoke or dust may occur, it is recommended to take appropriate
measures.
The calculation of the range depends on environmental conditions.
Recommended Fc correction factors:
Pu= Pm x Fc
Pu being the usable range and Pm the maximum range in metres.
The Fc factors are indicated in the following table.
Environmental conditions Fc correction factor
Fog 0.25
Dense smoke 0.25
Powder 0.5
Steam 0.5
6.1.1 Fastening
Correct alignment of the transmitter and the receiver is essential for the proper function of the
optoelectronic sensors.
uInstall the transmitter and the receiver using the supplied mounting accessories so that they are
exactly opposite each other.
uAlign the transmitter and the receiver so that they are in parallel at the same height and the plugs
face the same direction.
If vibrations are to be expected in the application, it is recommended to use vibration dampers
www.ifm.com.

Measuring light grids (10mm beam spacing) OY51
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Adjustable brackets can be used to ensure easy optical alignment www.ifm.com.
6.1.2 Optical alignment
TR T R
T R T R
T: Transmitter
R: Receiver
The LEDs of the receiver help to correctly align the optoelectronic sensors.
uAlign the transmitter so that the green LED of the receiver lights.
uFix the transmitter and the receiver.
6.2 Multiple systems
Using several light grids may lead to malfunction and disable the detection function.
Therefore, the light grids are to be installed so that the beam sent by the transmitter of a system can
only be detected by the corresponding receiver.
The following important rules for installation are to be observed to avoid mutual interference of several
systems:
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OY51 Measuring light grids (10mm beam spacing)
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2
3
1
T1
T1
T2
T2
T2
R1
R1
R1
R2
R2
Fig.1: Possible arrangements
1: Position of both transmitters next to each
other
2: Position transmitter 1 and receiver 2 on
top of each other
3: Combination in "L" shape
T: Transmitter
R: Receiver

Measuring light grids (10mm beam spacing) OY51
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7 Electrical connection
uDisconnect 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 supply voltage must not exceed a maximum of 28.8 V DC.
Therefore, a safe separation between current supply and transformer is necessary.
To guarantee functional reliability an output capacity of min. 2000 µF / A has to be ensured if a
power supply with diode bridge is used.
uConnect the devices as indicated in the following table:
7.1 Transmitter wiring diagram
Pin layout Pin Name Type Description
4
2 1
3
5
1 L+ (24 V DC) - Operating voltage
2 Range Input Configuration detection field width
24 V DC → range 1...10m
0 V DC → range 0…2m
3 L- (0 V DC) - Operating voltage
4 SYNC Output Synchronisation output
5 - - Not used
For information about available sockets/connectors see: www.ifm.com
7.2 Receiver wiring diagram
Pin layout Pin Name Type Description
4
2 1
3
5
1 L+ (24 V DC) - Operating voltage
2 SYNC Input Synchronisation input
3 L- (0 V DC) - Operating voltage
4 Q IEC 61131-3 Switching signal (SIO)
C IEC 61131-9 IO-Link interface (COM1, COM2, COM3)
5 - - Not used
For information about available sockets/connectors see: www.ifm.com
7.3 Synchronisation of transmitter and receiver
To ensure a reliable function of the measuring light grid, the transmitter and the receiver must be
synchronised. The two units can be synchronised optically Optical synchronisation (Ò/12) or via Y
cable Synchronisation via ifm Y cable (EY5053 and EY5054) (Ò/11). The settings are made via
IO-Link.
7.3.1 Synchronisation via ifm Y cable (EY5053 and EY5054)
The transmitter and the receiver can be synchronised using ifm Y cables (EY5053 or EY5054). They
must be wired according to the figure.
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OY51 Measuring light grids (10mm beam spacing)
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T R
1
2
L
3
2
BN
BK
BU
1L+
T: Transmitter
R: Receiver
1: ifm Y cable
2: Connection
Alternatively, the receiver can also be connected directly to the IO-Link master using a suitable
standard cable. The transmitter can be connected separately via a standard M12 connector (5-
pin). In this case, only optical synchronisation is possible Optical synchronisation (Ò/12).
For long detection field widths (1...10m range): EY5053
For short detection field widths (0...2m range): EY5054
7.3.2 Synchronisation via standard sockets
L
SYNC
1 BN
2 WH
4 BK
3 BU
L+
2
L
IN
SYNC
1 BN
2 WH
4 BK
3 BU
L+
2
1
T R
T: Transmitter
R: Receiver
1: Connection transmitter
2: Connection receiver
SYNC: Synchronisation
IN: 24 V DC Ò range 1…10m
0 V DC Ò range 0…2m
7.3.3 Optical synchronisation
The highest beam is used for optical synchronisation.

Measuring light grids (10mm beam spacing) OY51
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22
1
T R
IN
L
3
2
BN
BK
BU
1L+
L
3
4
BN
BK
BU
1L+
T: Transmitter
R: Receiver
1: Connection transmitter
2: Connection receiver
IN: 24 V DC Ò range 1…10m
0 V DC Ò range 0…2m
With optical synchronisation, the beam direction cannot be reversed.
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OY51 Measuring light grids (10mm beam spacing)
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8 Operating and display elements
12
1: Transmitter LED indication
2: Receiver LED indication
8.1 Transmitter LED states
Meaning Red Green Orange
System start
Error Transmitter fault diagnostics (Ò/19)
No synchronisation via cable
Ready for operation
Low range (flashes twice slowly)
High range (flashes twice quickly)
8.2 Receiver LED states
Meaning
Status LED IO-Link LED
Red Green yellow Red Green
Detection field interrupted
Detection field free
Teach activated
Object detected
Error Fault diagnosis receiver
(Ò/19)
Successful connection to IO-Link
master

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9 Operation
9.1 Switching mode (SIO mode)
In switching mode, the switching output is controlled according to the parameter setting.
9.2 Operation with IO-Link master
If the sensor is connected to an IO-Link master, parameter setting, triggering and data recording can
be done completely via IO-Link.
Further information at: www.ifm.com Ò Article number Ò Downloads Ò IODD
9.3 Process values
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
2
1
T R
Free light beam
Interrupted light beam
1: Number of light beams
2: Detection direction
3: Object
The detection direction is also the counting direction. The counting direction can be changed via
the IO-Link interface.
9.3.1 FBO – first beam occupied
The process value [FBO] indicates the position/number of the first interrupted light beam.
The following examples are for illustration purposes.
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
[FBO] = 10
3
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
[FBO] = 3
Fig.2: Example – FBO
Free light beam
Interrupted light beam
1: Number of light beams
2: Detection direction
3: Object
FBO: Process value
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OY51 Measuring light grids (10mm beam spacing)
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9.3.2 LBO – last beam occupied
The process value [LBO] indicates the position/number of the last interrupted light beam.
The following examples are for illustration purposes.
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
[LBO] = 12
3
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
[LBO] = 8
Fig.3: Example – LBO
Free light beam
Interrupted light beam
1: Number of light beams
2: Detection direction
3: Object
LBO: Process value
9.3.3 CBO – central beam occupied
The process value [CBO] indicates the position/number of the central interrupted light beam. If there
are several non-contiguous interrupted sections, the process value [CBO] refers to the section with the
most consecutive interrupted beams.
The following examples are for illustration purposes.
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
[CBO] = 11
3
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
[CBO] = 13
3
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
[CBO] = 5
Fig.4: Example – CBO
Free light beam
Interrupted light beam
1: Number of beams
2: Detection direction
3: Object
CBO: Process value
9.3.4 NBO – number of beams occupied
The process value [NBO] indicates the number of interrupted light beams.
The following examples are for illustration purposes.

Measuring light grids (10mm beam spacing) OY51
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3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
[NBO] = 3
3
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
[NBO] = 3
Fig.5: Example – NBO
Free light beam
Interrupted light beam
1: Number of light beams
2: Detection direction
3: Object
NBO: Process value
9.3.5 NCBO – number of consecutive beams occupied
The process value [NCBO] indicates the number of consecutive/contiguous beams occupied. If there
are several non-contiguous interrupted sections, the process value [NCBO] refers to the section with
the most consecutive beams occupied.
The following examples are for illustration purposes.
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
[NCBO] = 3
3
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
[NCBO] = 5
3
3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
[NCBO] = 3
Fig.6: Example – NCBO
Free light beam
Interrupted light beam
1: Number of light beams
2: Detection direction
3: Object
NCB
O:
Process value
9.3.6 Tolerance
A tolerance between zero and the max. value (depending on the number of beams) can be selected
via IO-Link.
2 2
3 3
1
OFF OFFON
1: Switch point [SP1]
2: Tolerance [SSCx TOL]
3: Outside measuring range
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OY51 Measuring light grids (10mm beam spacing)
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10 Technical data
10.1 Light grid with 10 mm beam spacing
Characteristics OY5100 OY5103 OY5106 OY5110 OY5113 OY5116
Total length [mm] 213 663 1113 1713 2163 2613
Detection field height
[mm]
140 590 1040 1640 2090 2540
Number of beams 15 60 105 165 210 255

Measuring light grids (10mm beam spacing) OY51
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11 Troubleshooting
The LEDs of the transmitter and the receiver indicate faulty operating states (Operating and display
elements (Ò/14)). For a detailed fault description see the following tables.
11.1 Transmitter fault diagnostics
LED Possible cause Troubleshooting
Red Red flashing Internal fault Send device to ifm branch office for repair.
11.2 Fault diagnosis receiver
LED Possible cause Troubleshooting
Red Lit permanently interrupted by a
pulse
No synchronisation Check the connections and alignment of the light grid.
Red Red flashing Internal fault Send device to ifm branch office for repair.
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OY51 Measuring light grids (10mm beam spacing)
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12 Maintenance, repair and disposal
• It is recommended to regularly clean the front panes of the transmitter and the receiver.
• Clean the unit with a clean, damp cloth. In particularly dusty environments we recommend to spray
the cleaned front pane with an antistatic product.
• Do not use any aggressive or abrasion-developing cleaning agents since they could attack the
surfaces. To avoid electrostatic charging on the front, do not use any woollen cloths.
Scratches on the front panes of the optoelectronic sensors may deviate the light beams and
impair the function.
• Only the manufacturer is allowed to repair the unit.
• Dispose of the unit in an environmentally friendly way in accordance with the applicable national
regulations when it is no longer used.