Light curtain sensor selection guide
The first step: to determine the optical axis spacing (resolution) of safety light curtain types
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It is necessary to consider the specific environment and operation of the operator. If the machine equipment is a paper cutter, the operator enters the dangerous area more frequently and is close to the dangerous area, which is prone to accidents, so choose a relatively small optical axis spacing Light curtain (for example: 10mm). Consider a light curtain that protects your fingers.
2. In the same way, if the frequency of entering the dangerous area is relatively reduced or the distance is enlarged, you can choose a palm-protecting (20-30mm).
3. If you want to protect the arm in the dangerous area, you can choose a light curtain with a slightly larger distance (40mm).
4. The maximum light curtain is to protect the human body, you can choose the maximum light curtain distance (80mm).
Step 1: Choose the protection height of light curtain
It should be determined according to specific machinery and equipment, and conclusions can be drawn from actual measurements. Pay attention to the difference between the height of the light barrier sensor and the protection height of the infrared light curtain. [The height of the safety light curtain: the total height of the surface of the safety light curtain; the protection height of the safety light sensor: the effective protection range of the light curtain when it is working, that is, the effective protection height = optical axis spacing * (total number of optical axes -1 )
Step 2: Choose the distance of the light curtain
The beam distance is the distance between the transmitter and the receiver, which should be determined according to the actual situation of the machine and equipment, so as to select a more suitable light curtain.
After determining the beam distance, the length of the cable must also be considered.
Step 3: to determine the output type of the light curtain signal
It must be determined according to the signal output mode of the safety light curtain. Some light curtains may not match the signal output by the machine and equipment, which requires configuration of the controller.
Step 4: bracket selection
Choose L-shaped bracket or base rotating bracket according to your needs.
Now you can start to choose the products you need
safety light curtain picture:
Safety light curtain type
| QAT | QBT | QCT | QLT | QOT | QSAT | QSM | QZT |
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The factory default beam length is 3 meters, can be customized, Can be customized for beams exceeding 6 meters, up to 35 meters, but the resolution can only be 20mm, 30mm, 40mm |
Ultra-thin, horizontal thin or vertical thin (2 meters) | Economical preference |
The factory default beam length is 3 meters, can be customize d, RS485
|
No blind zone (the protection height is almost the same as the total height) The factory default is 3 meters (the longest can be customized to 11 meters) |
The factory default beam length is 3 meters, can be customize d, |
The factory default beam length is 3 meters, can be customize d, |
Ultra-thin, horizontal thin or vertical thin (2 meters) |
QAT safety light curtain model parameters
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Light curtain form |
Opposite |
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Optical axis spacing |
10mm |
14mm |
20mm |
25mm |
30mm |
40mm |
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Detection accuracy |
18mm |
22mm |
28mm |
33mm |
38mm |
48mm |
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Number of beams |
6,8…32 |
6,8…32 |
4,6…32 |
6,8…32 |
4,6…32 |
4,6…32 |
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Protection height |
Optical axis spacing × (number of beams-1) |
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Detection distance |
30~3000mm,30~6000mm,30~30000mm |
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Response time |
≤15ms |
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Anti-light interference |
10000lux (incidence angle≥5°) |
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Dimensions |
35×51×Lmm (L is the length of the emitter/receiver) |
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Protection level |
IP65 |
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Controller |
QCA/QCA2 |
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voltage |
DC12/24V AC110-220V (with controller, relay passive output) |
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Current consumption |
≤200mA |
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Output |
NPN/PNP type, sink current 500mA, voltage drop below 1.5V, polarity, short circuit, overload protection |
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Output state |
ON when all optical axes receive light (green light on reception) |
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Indicator light |
Emitter: power indicator (red); receiver: output indicator light (green) shading (red) |
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light source |
Modulated infrared LED |
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Connection method |
Circular aviation socket with dedicated link cable, 5 cores for emitter and 5 cores for receiver |
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Shell material |
Aluminum alloy, end cover: ABS reinforced nylon |
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Resistant to ambient light |
Incandescent light: 3000Lx of light receiving surface; Sunlight: 10000Lx of light receiving surface |
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Ambient temperature |
When working: -10~+40℃ (but not freezing), when storing: -25~+55℃ |
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environment humidity |
When working: 35~85%RH, when storing: 35~95%RH |
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safety light curtain cable and safety light curtain controller:
About us
Cyndar is a global provider of smart sensors and industrial automation technology solutions, a globally trusted source of 2D/3D laser scanning system technology, and a 10-year professional manufacturer of lidar safety protection products. Cyndar specializes in professional solutions for smart sensors. We are committed to high-quality products, customized system integration and excellent cost control.
Please contact us to request a catalog of safety light curtains
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