Safety light grids and light curtains LCA
12Pages

Safety light grids and light curtains LCA

Light grids and light curtains LCA Light grids and light curtains are non-contact safety guards (electro-sensitive protective equipment) for securing danger areas on machines and installations. They use several light beams to form an invisible safety light curtain in front of the danger area. When a machine operator interrupts one of these light beams, it will cause the safety outputs to switch off. Non-contact safety guards are used whenever a machine operator must interact with the machine in very brief cycles, e.g. at loading points of automatic assembly machines. dangerous work areas...

n Light grids vs. light curtains The basic distinction between light grids and light curtains is the number of light beams used to produce a protective field. Light grids produce a protective field consisting of two to four light beams. Owing to the large distance between the individual light beams, light grids are particularly suitable for access control to large work areas and for applications involving a large distance between the operator and the hazardous movement. Light curtains consist of many light beams, which can detect different body parts depending on the resolution (14 – 50...

n Protection in compliance with standards Light grids and light curtains from series LCA meet all requirements in the relevant standards for non-contact safety guards (DIN EN 61496-1 / DIN EN 61496-2), as well as the requirements of EN ISO 13849 and IEC 62061. Category 2 / PL c or SIL 1 or category 4 / PL e or SIL 3 can be achieved depending on the type (2 or 4). n Distinction between type-2 and type-4 LCA devices On type-2 devices, the safety function is checked by periodic tests. Any fault is detected during the next periodic test, and the safety outputs are switched off. Type-2 light...

n Muting Muting allows safety functions of a light grid or light curtain to be bypassed automatically for a limited time. For example, parts supplied to a dangerous area can pass through the protective field without triggering the safety function. With the aid of additional sensors, the control system monitors the proper procedure and detects whether people move through the protective field instead of the defined parts, for example. This function is simple to implement with devices from series LCA in combination with the programmable small control system MSC. n The cascading of light...

Overview of series LCA To match different customer needs and requirements, EUCHNER offers three product families with different resolutions and protective field heights, as well as with different connection and wiring concepts: Protective field height (mm) 160 Number of beams 2 Range up to  12 m Protective field height (m

Protective field height (mm) 160 The versions with resolutions of 30 mm, 40 mm and 50 mm are also available with reduced range (up to 12 m). Number of beams 2 Range up to 20 m Protective field height (mm) 510 The versions with 2, 3 or 4 beams are also available with reduc

n Version LCA 4 MS Up to three transmitter and receiver units, consisting of a master unit and two slave units, can be connected in series. SLAVE 2 Resolution Range SLAVE 1 Resolution Range MASTER 30 mm up to 12 m Protective field height (mm) 310 MASTER Protective field height (mm) 160 Resolution Range Protective field height (mm) 260

Technical data overview Parameter Protective field height Resolutions Number of beams (light grid) Light curtains with 14 mm resolution Light curtains with 30/40/50 mm resolution and light grids with 2/3/4 beams Light curtains with 30/40/50 mm resolution and light grids with 2/3/4 beams, each with extended range Usable range (selectable) 2 semiconductor outputs, p-switching, short circuit-proof Current consumption Reaction time Operating voltage DC Connection Test pulse length 100 (50 between master and slave) Light curtains with 14 mm resolution and models with extended range Operating...

Monitoring options: - Finger protection - Hand protection - Body protection - Access control Minimal blind area Transmitter unit diagnostic field Feedback circuit to check external relays Less wiring effort thanks to M12 plug connector Ready to operate after 2 seconds Receiver unit diagnostic field

Selectable, integrated manual Streamlined design, ideal Protective field height Simple integration through hardware configuration on the plug connector Individual operation or with master/slave models connectible in series Detailed diagnostic function via LEDs Integrated evaluation

The advantages of LCA at a glance High level of protection against tampering Category 4 / PL e with only one device Less wiring work thanks to plug connector High degree of protection IP65, IP67 Deflection mirrors permit versatile use S horter access time and greater productivity through simple interaction between operator and machine Compact design Very simple setup through various start modes Wide product range with numerous applications EUCHNER GmbH + Co. KG Kohlhammerstraße 16 70771 Leinfelden-Echterdingen Germany 156153-05-01/23 Subject to technical modifications; no responsibility is...