Light barriers that work together
January 2003
Sensors & Transducers
Security Services & Risk Management
Peering through 10 pieces of white paper of standard thickness is no problem for Wenglor light barriers - which are well-suited to applications involving high levels of contamination, for example in the lumber industry. These sensors are capable of determining whether or not wooden boards on a conveyor belt are of identical length, or if one or more protrude over the edges of the pallet. They are also suitable for keeping an eye on grain silo filling levels.
Light barriers are connected to a central control unit, thus minimising the size of the transmitter and the receiver units. The LV 250 control unit is capable of monitoring three type EA 250/SA 250 light barriers. Twenty-seven individual light barriers can be used together by interconnecting nine control units with the help of a single strip connector. Versatile light barrier systems can be created that are easy to use. One of the control units is designated the master, and is used to manage all of the other control units, which may be implemented within widely varying environments. Quick and easy implementation of this technology is assured by logical operation, with a selector switch for the choice of functions and operating modes. The system is configured by means of a key and double-checking for correct set-up is a matter of glancing at the row of LEDs on the master device.
Each light barrier has its own output at the control unit, which allows for querying the switching status of each individual barrier. A group output (ie the logic output) can be used to monitor all of the light barriers simultaneously.
For more information contact Anastas Schnippenkotter, ASSTech Process Electronics & Instrumentation, 011 794 7057, [email protected], www.asstech.co.za
Further reading:
Global security in 2026
Editor's Choice News & Events Security Services & Risk Management Industrial (Industry) Mining (Industry)
The World Security Report 2026 states: “In a world of increasing volatility, physical security has evolved. It is no longer just a defensive measure; it is a critical driver of corporate value.”
Read more...
Who is to blame for autonomous mistakes?
Editor's Choice Security Services & Risk Management Industrial (Industry) Mining (Industry)
Most supply agreements for AI-integrated equipment still closely resemble plant hire contracts from ten years ago: bilateral, human-focused, and silent on who bears the risk when a machine makes a decision on its own.
Read more...
The post-Q1 security checklist
Asset Management Security Services & Risk Management
By this time of year, employees have changed jobs or roles, suppliers may have changed, and devices have moved between offices, homes, and sites. This is the right time for businesses to run a practical post-Q1 security check.
Read more...
PoPIA turns its attention to gated access
News & Events Security Services & Risk Management
The Information Regulator has gazetted its proposed Code of Conduct for the processing of personal information at gated access points. At 65 pages long, the code signals a significant shift in how personal information is collected and managed at entry points.
Read more...
Your company is already breached, you just do not know it yet
Information Security Security Services & Risk Management
Attackers are no longer relying on sophisticated exploits to break-in. Instead, they are systematically targeting weak credentials, misconfigured systems, and exposed devices stemming from preventable gaps such as identity weaknesses and poor visibility across digital environments.
Read more...
Excellerate Services sets a new standard
News & Events Security Services & Risk Management
Excellerate Services relies on specialist expertise and the sophistication of its operations deployment and management. Central to this is an investment in smarter, data-driven operations through the Velocity and Performance Centre platforms.
Read more...
957 women killed in three months
News & Events Security Services & Risk Management
Despite years of summits, task teams and public commitments, South Africa’s femicide rate remains around five times higher than the global average, and too few are using the legal lifelines available.
Read more...
Distance sensor for confined spaces
ifm - South Africa
Sensors & Transducers
The O6D100 from ifm has been designed as a powerful all-rounder for typical applications in object detection, distance measurement and positioning.
Read more...
Long-range laser distance measuring sensor
Vepac Electronics
Sensors & Transducers
The MS-100A is a long-range laser distance measuring sensor with a range of 150 to 1000 mm. This sensor excels in applications requiring extended measurement capabilities, such as quality control and logistics.
Read more...
Listening for damage to wind turbines
Sensors & Transducers
The Fraunhofer Institute for Integrated Circuits, working in concert with the Fraunhofer Institute for Wind Energy Systems, has developed a solution that can be used to identify cracks and breakage inside wind turbine blades remotely at an early stage.
Read more...
printer friendly version