The working principle of a safety light curtain guarding is that the emitter emits an invisible light beam, and the receiver receives the invisible light beam to form a protective detection light curtain. The receiver monitors the on/off status of the light curtain and processes the on/off signal of the light curtain through an internal circuit, which is connected to the PLC or alarm circuit through a transmission line to stop the equipment or issue a safety alarm.
The Garantta light curtain sensor adopts line synchronization technology, which has strong anti-interference ability, such as anti-light interference and anti-magnetic interference. It adopts an SMD surface mount design, imported high-end components, and uses photoelectric cyclic self-inspection to improve equipment safety.
Light Curtain Guarding Selection method
(1) The protection height: refers to the effective protection height of the safety light curtain, and the distance between the first beam and the last beam, which is called the effective protection height. Effective protection height is also the required protection height for machinery and the travel distance of machinery operation.
(2) Protection distance: A safety light curtain is formed by a transmitter and a receiver to form an infrared protection beam wall to protect the operator's safety. The protection distance is the distance between the transmitter and the receiver.
(3) Optical axis spacing: refers to the distance between adjacent optical axes, which is selected according to the needs. For protecting fingers, a 5mm or 10mm spacing can be selected; for protecting palms, a 20mm spacing can be selected; for protecting arms, 30mm or 40mm spacing can be selected; for protecting the human body, a 60mm spacing can be selected. When selecting the optical axis spacing, it needs to be based on the customer's mechanical protection needs.
(4) Choose the appropriate safety light curtain guarding output mode: according to your needs, including relay output, NPN output, dual NPN output, dual PNP output, controller output, etc.
(6) Installation methods: include two-end installation, spiral arm steel pipe installation, L-shaped side installation, etc. You can choose according to the needs of the device.
Classification of light curtain guarding
A safety light curtain is a device commonly used in industrial automation and machine safety to monitor and protect specific areas to prevent personnel or objects from entering hazardous areas. The safety light curtain is defined in different levels according to European standards, namely B level, 1 level, 2 level, 3 level, and 4 level.
- B-level: B-level safety light curtain is the most basic level, suitable for some simple safety applications. It provides basic personnel protection functions, can detect personnel entering the protected area, and trigger corresponding security measures. B-level light curtain sensor have low reliability and are suitable for low-risk application environments.
- Level 1: The Level 1 safety light curtain provides higher reliability and safety than Level B. It has more safety features and fault diagnosis capabilities, and can detect smaller objects and move at faster speeds. Level 1 safety light curtain is suitable for medium-risk application environments.
- Level 2: The Level 2 safety light curtain further enhances its functionality and reliability. It can detect smaller and faster objects, and has higher safety and fault diagnosis capabilities. Level 2 safety light curtain is suitable for medium to high-risk application environments.
- Level 3: The Level 3 safety light curtain is one of the high-performance levels. It has very high reliability and fault diagnosis capabilities, and can cope with high-risk application environments. Level 3 safety light curtains have higher requirements in terms of detection speed, detection range, and anti-misoperation triggering.
- Level 4: The Level 4 safety light curtain guarding is the highest level that provides the highest level of safety and reliability. Type 4 safety light curtain is commonly used in particularly dangerous and harsh industrial environments, capable of detecting the smallest and fastest objects, and has the highest anti-misoperation function. Real-time self-detection dual loop is adopted, and a failure will not result in the loss of safety functions, which will always exist.
Our Certificate
FAQ
Q： Why is the Class 4 safety Light Curtain Guarding Sensor price much higher than that of other classes of light curtain sensor
1. Higher safety level requirements
Class 4 safety light curtain guarding sensor (in accordance with Type 4 in EN/IEC 61496-1 standard) is the highest level of safety curtain sensor and is suitable for occasions with extremely high safety requirements. It requires redundancy and self-checking functions in hardware and software design to ensure that the system can still operate safely even when a single fault occurs. This high level of safety design and manufacturing requirements increases technical difficulty and cost.
2. Complex hardware design
Class 4 safety light curtains usually adopt a dual- or multi-channel design, with each channel operating independently and monitoring the others. This redundant design requires more electronic components and more complex circuit boards, which pushes up manufacturing costs.
3. Strict software algorithms
The software of the Class 4 safety light curtain needs to have powerful self-diagnosis functions to detect faults within the system in real time (such as sensor failure, circuit problems, etc.). Developing such high-reliability software requires a lot of R&D resources, which increases technical costs.
4. High-standard materials and processes
In order to ensure long-term stable operation in harsh industrial environments, the four-level safety light curtain usually adopts high-quality materials (such as high-temperature-resistant and corrosion-resistant shells) and precision manufacturing processes. The cost of these materials and processes is much higher than that of ordinary light curtains
Hot Tags: light curtain guarding, China light curtain guarding manufacturers, suppliers, factory, inductive proximity sensor detection switch, Photo beam sensors, type k thermocouple max temperature, Security Light Curtain, inductive sensors mounting, proximity touch sensor
