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
3
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.
GB

OY51 Measuring light grids (10mm beam spacing)
4
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
5
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.
GB

OY51 Measuring light grids (10mm beam spacing)
6
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
7
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.
GB

OY51 Measuring light grids (10mm beam spacing)
8
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
9
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:
GB

OY51 Measuring light grids (10mm beam spacing)
10
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