| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 1,360 mm |
Multiple beam safety light barriers
Multiple Light Beam Safety Devices are non-contact safety sensors used to safeguard hazardous areas. Unlike single-beam safety light barriers, multiple light beam safety devices consist of several transmitter and receiver units arranged in series, which generate multiple light beams.
The transmitters generate multiple light beams that are directed at the respective receiver. If one or more of these beams is interrupted by an obstacle, such as a hand or object, the receiver detects the interruption and triggers an alarm or protective measure.
Multiple light beam safety devices offer greater safety and accuracy than single light beam safety devices because they cover a larger area and require the interruption of multiple beams to trigger an alarm. This reduces the likelihood of false alarms caused by accidental interruptions.
Multiple light beam safety devices are often used in areas where precise protection of large areas is required, such as conveyors, robotics or automated production lines.
Modern multiple light beam safety devices often offer advanced features such as single beam evaluation, integrated evaluation units, environmental immunity and communication interfaces for easy integration into automated systems.
The use of multiple light beam safety devices provides reliable and accurate safeguarding of hazardous areas. They contribute to the safety of man and machine by detecting the interruption of multiple light beams and initiating protective measures.
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The transmitters generate multiple light beams that are directed at the respective receiver. If one or more of these beams is interrupted by an obstacle, such as a hand or object, the receiver detects the interruption and triggers an alarm or protective measure.
Multiple light beam safety devices offer greater safety and accuracy than single light beam safety devices because they cover a larger area and require the interruption of multiple beams to trigger an alarm. This reduces the likelihood of false alarms caused by accidental interruptions.
Multiple light beam safety devices are often used in areas where precise protection of large areas is required, such as conveyors, robotics or automated production lines.
Modern multiple light beam safety devices often offer advanced features such as single beam evaluation, integrated evaluation units, environmental immunity and communication interfaces for easy integration into automated systems.
The use of multiple light beam safety devices provides reliable and accurate safeguarding of hazardous areas. They contribute to the safety of man and machine by detecting the interruption of multiple light beams and initiating protective measures.
... Read more
1,921 - 1,940 / 1,951
| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 610 mm |
| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 1,060 mm |
| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 310 mm |
| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 160 mm |
| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 310 mm |
| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 1,510 mm |
| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 1,360 mm |
| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 610 mm |
| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 1,060 mm |
| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 160 mm |
| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 310 mm |
| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 1,510 mm |
| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 1,210 mm |
| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 460 mm |
| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 1,360 mm |
| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 910 mm |
| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 760 mm |
| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 760 mm |
| Response time/reaction time | 1,000 to 10,000 ms |
| Resolution | 5,000 mm |
| Protective field height | 1,210 mm |
A light beam interruption activates a switching output. This can be used to trigger a shutdown command.
The sensor category Multiple Light Beam Safety Devices includes all safety light barriers that emit more than one light beam. This includes both the safety light grids and the safety light curtains. The beam spacing determines the resolving power. The designation safety light grid or safety light curtain is determined, depending on the manufacturer's definition, depending on the number of beams and/or the beam distance.
Safety light grid:
Depending on the manufacturer's definition, beam spacing greater than 40 mm, but also 70 mm, 80 mm, is referred to as a light grid.
Safety light curtain:
For beam spacing/resolution smaller than 40 mm...80 mm (depending on the manufacturer's definition), the multiple light beam safety device is referred to as a safety light curtain.
Another definition used is the one using electro-sensitive protective equipment in accordance with EN/IEC 61496-1-2, types 2 and 4.
Definition: A non-contact safety guard (ESPE) is installed on machines that pose a risk of bodily injury. It provides protection by causing the machine to enter a safe state before a person can enter a hazardous situation.
Terms:
Resolution
The resolution specifies how large the smallest object must be so that it is always detected by the protective field of the sensor. This dimension results from the beam distance of the multiple light beam safety device and the beam diameter
Safety distance
The safety distance is defined as the minimum distance between the multiple light beam safety device and the hazardous object. This safety distance must ensure that a person, hand or finger cannot reach the hazardous object before, for example, the machine has come to a standstill. This calculation includes the speed of the hand, for example, the stopping time of the machine and the response time of the protective device.
Optical muting
Muting is a human - object distinction. If a person moves into the danger zone, the shutdown of the device is activated. In the ongoing production process, it may be necessary to feed e.g. materials to the machine. However, this material feed should not trigger a shutdown so as not to interrupt the production process. The protective function is interrupted for a limited time.
Fixed Blanking
Fixed blanking is a method in which individual light beams or areas of the multiple light beam safety device are permanently blanked. The blanked objects must be permanently in the protective field, otherwise the light curtain switches off.
Floating Blanking
Floating blanking is a method in which individual light beams or areas of the multiple light beam safety device are permanently blanked/bridged. This enables, for example, the permanent removal and feeding of materials without the light curtain switching off. The protective function is otherwise retained.
Through the attribute selection in diribo, you will find the right multiple light beam safety device for your application, regardless of the definition pf the safety light curtain or safety light grid.
The sensor category Multiple Light Beam Safety Devices includes all safety light barriers that emit more than one light beam. This includes both the safety light grids and the safety light curtains. The beam spacing determines the resolving power. The designation safety light grid or safety light curtain is determined, depending on the manufacturer's definition, depending on the number of beams and/or the beam distance.
Safety light grid:
Depending on the manufacturer's definition, beam spacing greater than 40 mm, but also 70 mm, 80 mm, is referred to as a light grid.
Safety light curtain:
For beam spacing/resolution smaller than 40 mm...80 mm (depending on the manufacturer's definition), the multiple light beam safety device is referred to as a safety light curtain.
Another definition used is the one using electro-sensitive protective equipment in accordance with EN/IEC 61496-1-2, types 2 and 4.
Definition: A non-contact safety guard (ESPE) is installed on machines that pose a risk of bodily injury. It provides protection by causing the machine to enter a safe state before a person can enter a hazardous situation.
Terms:
Resolution
The resolution specifies how large the smallest object must be so that it is always detected by the protective field of the sensor. This dimension results from the beam distance of the multiple light beam safety device and the beam diameter
Safety distance
The safety distance is defined as the minimum distance between the multiple light beam safety device and the hazardous object. This safety distance must ensure that a person, hand or finger cannot reach the hazardous object before, for example, the machine has come to a standstill. This calculation includes the speed of the hand, for example, the stopping time of the machine and the response time of the protective device.
Optical muting
Muting is a human - object distinction. If a person moves into the danger zone, the shutdown of the device is activated. In the ongoing production process, it may be necessary to feed e.g. materials to the machine. However, this material feed should not trigger a shutdown so as not to interrupt the production process. The protective function is interrupted for a limited time.
Fixed Blanking
Fixed blanking is a method in which individual light beams or areas of the multiple light beam safety device are permanently blanked. The blanked objects must be permanently in the protective field, otherwise the light curtain switches off.
Floating Blanking
Floating blanking is a method in which individual light beams or areas of the multiple light beam safety device are permanently blanked/bridged. This enables, for example, the permanent removal and feeding of materials without the light curtain switching off. The protective function is otherwise retained.
Through the attribute selection in diribo, you will find the right multiple light beam safety device for your application, regardless of the definition pf the safety light curtain or safety light grid.
What are multiple light beam safety devices and how do they work?
Multiple light beam safety devices are optoelectronic devices that are used to safeguard hazardous areas. They consist of several light beams that are emitted between a transmitter and a receiver. Interrupting the light beams triggers a switching process that triggers a safety reaction, such as stopping a machine.
The function of a multiple light beam safety device is based on the principle of light shading. The transmitter continuously emits several light beams, which are received by the receiver. If one or more of these light beams are interrupted by an object or person, the receiver detects this and triggers a switching operation. This can be used, for example, to stop a machine to prevent injuries.
The number of light beams emitted varies depending on the model and application. Multiple light beam safety devices offer the advantage of greater safety, as they can cover a larger area and several beams need to be interrupted to trigger the switching process. This reduces the risk of false triggering.
Multiple light beam safety devices are used in various sectors, such as industry, logistics or robotics, to safeguard hazardous areas and ensure the protection of persons.
The function of a multiple light beam safety device is based on the principle of light shading. The transmitter continuously emits several light beams, which are received by the receiver. If one or more of these light beams are interrupted by an object or person, the receiver detects this and triggers a switching operation. This can be used, for example, to stop a machine to prevent injuries.
The number of light beams emitted varies depending on the model and application. Multiple light beam safety devices offer the advantage of greater safety, as they can cover a larger area and several beams need to be interrupted to trigger the switching process. This reduces the risk of false triggering.
Multiple light beam safety devices are used in various sectors, such as industry, logistics or robotics, to safeguard hazardous areas and ensure the protection of persons.
What advantages do multiple light beam safety devices offer compared to other safety systems?
Multiple light beam safety devices offer several advantages compared to other safety systems:
1. High security: Multiple light beam safety devices have several light beams that cover the area to be monitored. If one of the beams is interrupted, the system immediately triggers an alarm or a safety shutdown. This ensures reliable detection of persons or objects.
2. Flexibility: Multiple light beam safety devices can be adapted to different requirements. They can be installed in different heights and widths and therefore offer a flexible solution for different applications and environments.
3. Simple installation: The installation of multiple light beam safety devices is usually quite simple. They do not require complex cabling or elaborate configurations. This means they can be installed and put into operation quickly.
4. Low false alarm rate: The use of multiple light beams reduces the probability of false alarms. Small animals, dust or other moving objects can interrupt individual beams without triggering an alarm. This significantly reduces the false alarm rate.
5. Long-range monitoring: Multiple light beam safety devices can also be used over long distances. They offer reliable monitoring over several meters and thus enable effective protection of large areas.
6. Compatibility with other security systems: Multiple light beam safety devices can be easily integrated into existing safety systems. They can be connected to other sensors, alarm systems or security mechanisms to create a comprehensive security system.
Overall, multiple light beam safety devices offer a reliable and flexible solution for safeguarding areas and enable hazardous situations to be detected quickly.
1. High security: Multiple light beam safety devices have several light beams that cover the area to be monitored. If one of the beams is interrupted, the system immediately triggers an alarm or a safety shutdown. This ensures reliable detection of persons or objects.
2. Flexibility: Multiple light beam safety devices can be adapted to different requirements. They can be installed in different heights and widths and therefore offer a flexible solution for different applications and environments.
3. Simple installation: The installation of multiple light beam safety devices is usually quite simple. They do not require complex cabling or elaborate configurations. This means they can be installed and put into operation quickly.
4. Low false alarm rate: The use of multiple light beams reduces the probability of false alarms. Small animals, dust or other moving objects can interrupt individual beams without triggering an alarm. This significantly reduces the false alarm rate.
5. Long-range monitoring: Multiple light beam safety devices can also be used over long distances. They offer reliable monitoring over several meters and thus enable effective protection of large areas.
6. Compatibility with other security systems: Multiple light beam safety devices can be easily integrated into existing safety systems. They can be connected to other sensors, alarm systems or security mechanisms to create a comprehensive security system.
Overall, multiple light beam safety devices offer a reliable and flexible solution for safeguarding areas and enable hazardous situations to be detected quickly.
How many beams should ideally be present in a multiple light beam safety device to ensure reliable protection?
To ensure reliable protection, there should ideally be at least two beams in a multiple light beam safety device. By using two beams, a so-called "muting" function can be realized, in which the protection by the light barrier is temporarily deactivated to enable the material flow. If one of the two beams is interrupted, the protection is activated and the material flow is stopped. This increases safety and prevents unintentional interruptions to the protection system. However, depending on the application, more than two beams can be used to ensure even greater safety.
Which areas of application are particularly suitable for multiple light beam safety devices?
Multiple light beam safety devices are particularly suitable for applications where reliable detection of persons or objects is required. Here are some examples:
1. Access control: Multiple light beam safety devices can be used to monitor access to certain areas, e.g. to ensure that only authorized persons enter an area.
2. Machine safety: In industrial environments, multiple light beam safety devices can be used to ensure the safe operation of machines. They can detect people or objects and stop the machine if the light beam is interrupted.
3. Warehouse and logistics area: In warehouse and logistics environments, multiple light beam safety devices can be used to ensure the safe operation of conveyor belts, storage and retrieval machines or forklift trucks. They can recognize obstacles or people and initiate the appropriate safety measures.
4. Vehicle recognition: Multiple light beam safety devices can also be used to detect vehicles in parking garages or in traffic guidance systems. They can detect the presence or passage of vehicles and trigger corresponding actions, e.g. opening barriers or detecting license plates.
5. Automatic door and gate control: Multiple light beam safety devices can be used in automatic door or gate control systems. They can detect people or objects and control the doors or gates accordingly to ensure safe passage.
However, these areas of application are not exhaustive, as multiple light beam safety devices can be used in various industries and environments where reliable detection is required.
1. Access control: Multiple light beam safety devices can be used to monitor access to certain areas, e.g. to ensure that only authorized persons enter an area.
2. Machine safety: In industrial environments, multiple light beam safety devices can be used to ensure the safe operation of machines. They can detect people or objects and stop the machine if the light beam is interrupted.
3. Warehouse and logistics area: In warehouse and logistics environments, multiple light beam safety devices can be used to ensure the safe operation of conveyor belts, storage and retrieval machines or forklift trucks. They can recognize obstacles or people and initiate the appropriate safety measures.
4. Vehicle recognition: Multiple light beam safety devices can also be used to detect vehicles in parking garages or in traffic guidance systems. They can detect the presence or passage of vehicles and trigger corresponding actions, e.g. opening barriers or detecting license plates.
5. Automatic door and gate control: Multiple light beam safety devices can be used in automatic door or gate control systems. They can detect people or objects and control the doors or gates accordingly to ensure safe passage.
However, these areas of application are not exhaustive, as multiple light beam safety devices can be used in various industries and environments where reliable detection is required.
How are multiple light beam safety devices installed and how are they set up?
Multiple light beam safety devices are usually installed in several steps:
1. Mounting the transmitter and receiver units: The transmitter and receiver units of the light barrier are mounted at the desired positions. The units must be aligned so that they face each other and the light rays can pass between them unhindered.
2. Cabling of the units: The transmitter and receiver units are connected using cables. The cables are connected to the corresponding connections on the units. It is important to carry out the wiring in accordance with the manufacturer's instructions to ensure that the light barrier functions correctly.
3. Connection to the control unit: The light barrier must be connected to a control unit that is responsible for monitoring and evaluating the signals. The corresponding cables are connected to the control unit for this purpose.
4. Alignment of the light beams: After installation and cabling, the light beams of the transmitter and receiver units must be aligned so that they meet exactly. This can be achieved by moving and/or aligning the units. Some light barriers have an integrated alignment aid that makes the process easier.
5. Test and fine adjustment: After alignment, the light barriers must be tested to ensure that they are working properly. It should be checked whether the light barrier reacts correctly to interruptions in the light beam and sends corresponding signals to the control unit. If necessary, the light barriers can be fine-tuned to achieve optimum performance.
It is important to follow the manufacturer's specific instructions, as the exact procedure may vary depending on the model and manufacturer. In addition, all applicable safety regulations and standards should be observed to ensure safe installation of the light barriers.
1. Mounting the transmitter and receiver units: The transmitter and receiver units of the light barrier are mounted at the desired positions. The units must be aligned so that they face each other and the light rays can pass between them unhindered.
2. Cabling of the units: The transmitter and receiver units are connected using cables. The cables are connected to the corresponding connections on the units. It is important to carry out the wiring in accordance with the manufacturer's instructions to ensure that the light barrier functions correctly.
3. Connection to the control unit: The light barrier must be connected to a control unit that is responsible for monitoring and evaluating the signals. The corresponding cables are connected to the control unit for this purpose.
4. Alignment of the light beams: After installation and cabling, the light beams of the transmitter and receiver units must be aligned so that they meet exactly. This can be achieved by moving and/or aligning the units. Some light barriers have an integrated alignment aid that makes the process easier.
5. Test and fine adjustment: After alignment, the light barriers must be tested to ensure that they are working properly. It should be checked whether the light barrier reacts correctly to interruptions in the light beam and sends corresponding signals to the control unit. If necessary, the light barriers can be fine-tuned to achieve optimum performance.
It is important to follow the manufacturer's specific instructions, as the exact procedure may vary depending on the model and manufacturer. In addition, all applicable safety regulations and standards should be observed to ensure safe installation of the light barriers.
What factors can influence the performance of multiple light beam safety devices and how can they be optimized?
The performance of multiple light beam safety devices can be influenced by various factors. Some of these factors are:
1. Ambient conditions: Interferences such as strong light sources, dust, smoke or fog can impair the performance of the light barriers. To optimize performance, these interferences should be minimized or eliminated. This can be achieved by using filters or housings.
2. Alignment of the light beams: Correct alignment of the light beams is crucial for the performance of the light barriers. If the beams are not aligned correctly, this can lead to false triggering or failures. Alignment can be optimized through precise mounting and adjustment.
3. Ability to reflect on the goal: The light barriers often work with reflection, in which the light is reflected back from a target object. The target's ability to reflect can influence performance. Highly reflective targets are more suitable for the light barriers than low-reflective targets. Choosing the right target material can improve performance.
4. Distance between transmitter and receiver: The distance between the transmitter and receiver can influence the performance. The further the distance, the weaker the reflected signal. To optimize performance, the distance should be kept as short as possible. Amplifiers or amplification functions can be used for greater distances.
5. Electrical faults: Electrical disturbances such as electromagnetic interference can impair the performance of the light barriers. To optimize performance, suitable shielding or filters should be used to minimize this interference.
6. Maintenance and cleaning: Regular maintenance and cleaning of the light barriers can optimize performance. Dust, dirt or other deposits can block the light beams or impair the sensors. Regular cleaning and inspection can maintain performance.
It is important to note that the optimum performance of a multiple light beam safety device depends on various factors and may require customization and adjustment to achieve the best possible performance.
1. Ambient conditions: Interferences such as strong light sources, dust, smoke or fog can impair the performance of the light barriers. To optimize performance, these interferences should be minimized or eliminated. This can be achieved by using filters or housings.
2. Alignment of the light beams: Correct alignment of the light beams is crucial for the performance of the light barriers. If the beams are not aligned correctly, this can lead to false triggering or failures. Alignment can be optimized through precise mounting and adjustment.
3. Ability to reflect on the goal: The light barriers often work with reflection, in which the light is reflected back from a target object. The target's ability to reflect can influence performance. Highly reflective targets are more suitable for the light barriers than low-reflective targets. Choosing the right target material can improve performance.
4. Distance between transmitter and receiver: The distance between the transmitter and receiver can influence the performance. The further the distance, the weaker the reflected signal. To optimize performance, the distance should be kept as short as possible. Amplifiers or amplification functions can be used for greater distances.
5. Electrical faults: Electrical disturbances such as electromagnetic interference can impair the performance of the light barriers. To optimize performance, suitable shielding or filters should be used to minimize this interference.
6. Maintenance and cleaning: Regular maintenance and cleaning of the light barriers can optimize performance. Dust, dirt or other deposits can block the light beams or impair the sensors. Regular cleaning and inspection can maintain performance.
It is important to note that the optimum performance of a multiple light beam safety device depends on various factors and may require customization and adjustment to achieve the best possible performance.
Which legal regulations and standards must be observed when using multiple light beam safety devices?
Various legal regulations and standards must be observed when using multiple light beam safety devices. Here are some of the most important ones:
1. Machinery Directive (2006/42/EC): The multiple light beam safety devices must comply with the requirements of the Machinery Directive in order to ensure the safety of persons.
2. Standard EN ISO 13849-1: This standard describes the safety-related parts of control systems and specifies requirements for the safety functions that must be fulfilled by the multiple light beam safety devices.
3. Standard EN 61496-1: This standard specifies the requirements for electro-sensitive protective equipment, which also includes multiple light beam safety devices. Among other things, it describes the arrangement of the beams, the range and the reaction time.
4. Standard EN 61496-2: This standard defines the performance level (PL) requirements for electro-sensitive protective equipment, including multiple light beam safety devices.
5. Standard EN 62061: This standard describes the requirements for the safety functions of electrical, electronic and programmable electronic systems used in multiple light beam safety devices.
It is important that the multiple light beam safety devices comply with the relevant legal regulations and standards to ensure the safety of persons. Manufacturers and operators should therefore carefully check and comply with these regulations.
1. Machinery Directive (2006/42/EC): The multiple light beam safety devices must comply with the requirements of the Machinery Directive in order to ensure the safety of persons.
2. Standard EN ISO 13849-1: This standard describes the safety-related parts of control systems and specifies requirements for the safety functions that must be fulfilled by the multiple light beam safety devices.
3. Standard EN 61496-1: This standard specifies the requirements for electro-sensitive protective equipment, which also includes multiple light beam safety devices. Among other things, it describes the arrangement of the beams, the range and the reaction time.
4. Standard EN 61496-2: This standard defines the performance level (PL) requirements for electro-sensitive protective equipment, including multiple light beam safety devices.
5. Standard EN 62061: This standard describes the requirements for the safety functions of electrical, electronic and programmable electronic systems used in multiple light beam safety devices.
It is important that the multiple light beam safety devices comply with the relevant legal regulations and standards to ensure the safety of persons. Manufacturers and operators should therefore carefully check and comply with these regulations.