Product category:
Machine Safety Components
News Release from: SICK (UK) | Subject: L4000
Edited by the Engineeringtalk Editorial
Team on 17 July 2003
Maximum safety for minimum cost
The L4000 safety photoelectric switch system is a low-cost, Type 4, noncontact safety device that meets the requirements of IEC61 496.
The L4000 safety photoelectric switch system is a low-cost, Type 4, noncontact safety device that meets the requirements of IEC61 496 Used to safeguard hazardous areas on machinery and control access to restricted areas, the new system will be of interest to end users and machinery manufacturers alike
This article was originally published on Engineeringtalk on 1 Aug 2008 at 8.00am (UK)
Related stories
Vision sensor promises photoelectric ease
The Inspector's rugged IP67-protected metal housing ensures it can withstand harsh industrial and production line environments, for quality assurance inspection in any location or orientation.
Incremental encoders provide smooth running
Bearings are separated as widely as possible within the encoder body, to achieve smooth and vibration-free running.
It provides a versatile, cost effective, compact and easy to install alternative to conventional light curtains, which may be too large and expensive for some applications.
The cornerstone of the L4000 system is the UE 401 safety evaluation unit (enclosure rating IP20), to which up to four individual sensor pairs, ie transmitter/receiver combinations, or up to eight cascaded sensor pairs, can be connected.
The L4000 sensors are available with a choice of metal or plastic bodies and, for the first time, feature the safety switch optics and signal preprocessing built into standard M18 and M30 diameter cylindrical housings.
Rated to IP 67 and with an expanded temperature range of -20 to +55C, the sensors are ideal for safeguarding machines and plant - including outdoor monitoring of doors and gates for pedestrian or vehicular access.
The standard cylindrical housing makes the L4000 sensors quick and simple to mount and the integrated design allows simple alignment of the transmitter and receiver.
Range variants from 0 to 10 and 0 to 60m cover most applications.
The L4000 system offers the highest category of safety.
During operation, a UE 401 safety evaluation device monitors the safe functioning of the sensors and the system generates a cutoff signal if the light path is interrupted.
Supplementary integrated functions include external contact monitoring and restart interlock.
Colour LEDs provide in-situ information on the operating state and rapid fault diagnosis is possible using the visual signals and error messages on the seven-segment display of the UE 401.
With the introduction of the L4000 system, Erwin Sick has provided engineers with an integrated system that is both quick to install and easy to use.
With its low cost, compact size, installation flexibility and choice of options, it is ideal for even the most complex safeguarding tasks, including the use of corner mirrors and applications outdoors.
• SICK (UK): contact details and other news
• Email this article to a colleague
• Register for the free Engineeringtalk email newsletter
• Engineeringtalk Home Page
