Products & Technology

A:When purchasing the DADISICK QSA multi-sided light curtain, please refer to the following points according to actual usage needs:1. Number of protection surfaces1 to 4 configurations are available to adapt to different fence layouts.2. Detection distanceSupports a range of 1–45 meters to meet the protection needs of most scenarios.3. Resolution selectionSelect the required resolution based on the detection object (such as fingers, palms, and whole bodies).4. Installation spaceThe mirror reflection design is suitable for applications with limited space but multi-sided monitoring.5. System compatibilityEnsure that it can be integrated into existing safety control systems (such as PLCs, safety relays, etc.).6. Environmental adaptabilityPay attention to whether the dustproof, shockproof, and anti-interference capabilities meet the requirements of the application site.7. Compliance certificationThe product complies with international safety standards such as CE and ISO 13849.8. Technical supportIf you have any questions, you can always contact the DADISICK technical team for professional selection suggestions.

A:Single-sided light curtains only protect one plane; QSA uses mirror foldback to achieve multi-surface monitoring with one wiring, reducing hardware and installation time, and saving PLC I/O.

A:QSA is a Multi-Sided Access Protection light curtain developed by DADISICK for four-sided fence protection scenarios. It uses transmitters, reflectors and receivers to form 1-4 infrared networks, which can build a closed safety zone within a distance of 1-45 m.

A:Yes, in general, it is safer to use normally closed (NC) contacts than normally open (NO) contacts for safety light curtains for the following reasons:✅ Why is normally closed safer?1. Power failure causes immediate shutdown, default safe state:Normal closed contacts are closed in normal state. Once power is lost, the line is loose, the light curtain fails or the cable is damaged, the circuit will automatically disconnect, causing the system to shut down or enter a safe state.This is the basic principle of "fail-safe design".2. Easier to monitor disconnection or failure:The controller or safety relay can detect whether the circuit is closed in real time. If the contact opens abnormally, an alarm will be immediately issued or the output will be cut off.Normal open contacts cannot be disconnected naturally in the event of a fault, and may be mistakenly believed that the equipment is still operating normally, which poses a risk.3. Safety standard recommendation:International standards (such as ISO 13849-1, IEC 61508) and related mechanical safety specifications also recommend the use of normally closed contacts as safety signal interfaces.

A:When a moving part with a safety edge hits an operator or the operator hits a moving part, the conductive layer inside it is squeezed by external force and forms a circuit, thereby triggering the safety control system to send a signal to stop the equipment or perform a preset safety action. This structure can respond to collision or pinching risks in the first place, effectively preventing personal injury or equipment damage.

A:The blanking function of the safety light curtain mainly includes two types: fixed blanking and floating blanking, which are used to temporarily shield certain light axes in specific applications to prevent non-dangerous objects from triggering alarms.Fixed blanking: The beam area at the preset position is shielded, which is suitable for long-term fixed objects (such as fixtures, conveyor line structures, etc.).Floating blanking: The shielded object is allowed to move within a certain range, which is suitable for dynamic scenes such as material in and out or robot arm movement.These two blanking methods improve the operating efficiency and adaptability of the equipment without reducing the overall safety level.

A:In general, according to the concept of modern DADISICK laser radar by Dadi, it can be classified into the following types:1. Based on the laser wavelength: ultraviolet laser radar, visible laser radar, and infrared laser radar.2. Based on the laser medium: gas laser radar, solid-state laser radar, semiconductor laser radar, and diode-pumped solid-state laser radar.3. Based on the laser emission waveform: pulsed laser radar, continuous wave laser radar, and hybrid laser radar.4. Based on the display method: analog or digital display laser radar and imaging laser radar.5. Based on the platform: ground-based fixed laser radar, vehicle-mounted laser radar, airborne laser radar, shipborne laser radar, spaceborne laser radar, missile-borne laser radar, and handheld laser radar.6. Based on the functionality: laser ranging radar, laser speed radar, laser angle radar, tracking radar, laser imaging radar, laser target designator, and biological laser radar.7. Based on the application: laser rangefinder, range laser radar, fire control laser radar, tracking and identification laser radar, multifunctional tactical laser radar, chemical detection laser radar, navigation laser radar, meteorological laser radar, chemical detection and atmospheric monitoring laser radar, etc.

A: The difference between automatic reset and manual reset of safety light curtain is as follows:✅ Automatic reset:· Definition: After the obstacle is removed, the light curtain automatically resumes working state without manual intervention.· Advantages: High efficiency, suitable for automation environment without frequent manual confirmation.· Risks: There is a risk of false triggering, and automatic reset before personnel evacuate may pose a safety hazard.✅ Manual reset:· Definition: After the obstacle is cleared, the light curtain needs to be restarted by operating a button or signal.· Advantages: Safer, ensuring that the operator has left the dangerous area before resuming operation.· Disadvantages: Manual confirmation is required, and the efficiency is slightly lower.

A:The optical axis spacing refers to the center distance between two adjacent infrared beams in the safety light curtain. It is usually measured in millimeters (mm) to measure the detection accuracy of the light curtain.

A：In the safety laser scanner, "safety zone" and "warning zone" are two different monitoring areas, and their functions are as follows:Safety Zone:It is the key protection area set by the scanner. Once a person or object is detected entering this area, the system will immediately trigger a safety response, such as emergency shutdown, to ensure that personnel are not injured by the machine.Warning Zone:It is the outer early warning area. Entering this area will not immediately shut down, but will trigger prompt measures (such as sound and light alarms) to remind personnel to pay attention to approaching dangerous areas.By setting these two areas reasonably, hierarchical response can be achieved to improve safety and work efficiency.

The main features of safety relays include:1. Forced guided contacts: ensure that normally open and normally closed contacts are not connected at the same time, which helps with fault detection.2. Redundant design: internal multi-channel circuits to improve fault tolerance.3. Self-check function: automatically check the wiring and contact status when power is on to ensure system safety.4. Compliance with safety standards: meet international safety standards such as EN ISO 13849-1 and IEC 62061.5. Compatible with a variety of safety inputs: such as emergency stop buttons, safety light curtains, safety door switches, etc.6. Quick disconnect output: quickly cut off dangerous power in abnormal situations to ensure personnel safety.These features make it an indispensable core component in industrial safety control systems.

A:Safety relays are needed in safety circuits to ensure that the equipment can reliably cut off dangerous actions in emergency or abnormal situations, thereby ensuring the safety of personnel and equipment. Its role is far beyond that of ordinary relays for the following reasons:✅ Why safety relays are needed:1. Forced guided contact structureIt has a forced opening/closing function to prevent false operation when the contacts are stuck, which is not available in ordinary relays.2. Fault self-checking and feedback monitoringIt can detect disconnection and short circuit of the input signal circuit, as well as the feedback status of the actuator (such as contactor).3. Redundant design ensures safetyUsually dual-channel input is used, so that the system can still stop safely even if one circuit fails.4. Compliance with safety standardsMeet the design requirements of international safety standards such as ISO 13849 and IEC 61508 to ensure that the safety level of PL e or SIL 3 is achieved.5. Key safety signal controlControl key equipment such as emergency stop buttons, safety light curtains, and safety door locks to ensure reliable signal execution.

The role of safety relays is to ensure that industrial equipment can stop operating reliably and safely in an emergency, thereby protecting personnel and equipment. Its main functions include:1. Realize safety control logic: such as dual-channel input monitoring, interlocking, redundancy, etc.2. Connect safety devices: such as emergency stop buttons, safety light curtains, safety door locks, two-hand buttons, etc.3. Perform forced disconnection: immediately cut off the power supply to dangerous equipment when a fault or safety condition is triggered.4. Safety level guarantee: meet the requirements of safety standards such as ISO 13849-1 and IEC 61508.In short:👉 Safety relays are the core components of safety control systems and are used to achieve reliable shutdown protection.

When selecting a safety relay unit, the following factors should be considered:1. Safety level requirements (Performance Level / SIL)Based on the risk assessment results of the application scenario, select a safety relay that meets the corresponding safety level (such as PL e, SIL3).2. Input signal typeClarify the type of safety equipment connected (such as safety light curtains, safety door locks, emergency stop buttons, two-hand buttons, etc.) to ensure input compatibility.3. Output type and quantityDetermine whether normally open, normally closed, delayed or instantaneous output is required based on the number of devices to be controlled and the control method.4. Redundancy and diagnostic capabilitiesSelect relays with corresponding functions based on whether the application requires dual-channel redundancy, circuit self-test, short-circuit monitoring and other functions.5. Power supply voltageConfirm whether the power supply voltage of the control system (such as 24V DC or 230V AC) matches the safety relay.6. Installation method and volumeConsider whether the size of the relay is suitable for the control cabinet space and whether it supports rail installation.7. ExpandabilityIf multiple safety loops are required, consider whether expansion modules or multi-input designs are supported.8. Brand compatibility and certification standardsChoose products with CE, TÜV and other certifications, and ensure compatibility with existing control systems or PLCs.These selection factors help ensure that safety relays meet safety standards in actual applications and have good system integration and stability.