ILGT

Light grids

The safety light grid for power operated gates – also secure directly the wing path of vertically moved gates

The ILGT is the safety light grid for all power operated gates up to a width of 12 m. It is an ESPE type 2 or an AOPD type 2, SIL 1, Cat. 2, Performance level c and can be used as the sole sealing device of power-operated gates. In addition, it can be installed directly into the guide rail for gates of vertically moved gates. The gate is provided with comprehensive mobility at a closing speed of 0.02 to 6 m/s.

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Also otherwise it provides everything you might expect from a good safety light grid such as dynamic blanking, local parameterability, random channel suppressions, parallel and crossed light beams, outstanding foreign light and EMC immunity, high mechanical stability and good adjustability, and last, but not least, a favourable price.

The ILGT is divided into two series:

  • D.ILGT for dynamic installation and
  • S.ILGT for static installation.

Both ILGT series may be used as a normal light grid with limited safety and without test function. For this we recommend especially the D.ILGT.

ILGT safety

D.ILGT

The D.ILGT may be mounted firmly (statically) and on the gate wing in a moveable manner (dynamically). The D.ILGT is a full-size safety light grid but with the restriction that the opening angle of the light beam is larger than required by EN61496-2. D.ILGT safety: EN12445, EN12453, EN13241-1, EN13849-1 (Cat. 2, PL c), EN62061 (SIL 1), EN61496-1 (ESPE Type 2), EN61496-2 Section 5.4, EN12978 without Section 5.3.3

S.ILGT

The S.ILGT may only be mounted firmly (statically), thus is must not move along at the gate wing. The S.ILGT is a full-size safety light grid without restriction. S.ILGT safety: as D.ILGT, but in addition EN12978 and EN61496-2 (AOPD) without restriction.

Mounting types

(Length specifications see tables in the data sheet.)

Blanking

The ILGT (D.ILGT and S.ILGT) can be installed by the dynamic blanking directly in the gate wing path of sectional and high-speed gates (also with film hanging), whereby it cooperates with most gate control systems. Except for the power supply, if necessary a test input and switching output there is no further interconnection or connection to the gate control system required. The gate is provided with comprehensive mobility between 0.02 and 6 m/s (depending on the channel grid). After a light grid interruption or any stop, there is no need for the gate to move up again. Furthermore, an object is also detected located directly underneath the edge of the gate, no monitoring hole occurs as with other blanking procedures.

In spite of blanking, the ILGT is able to work with crossed beams enabling a dense monitoring grid detecting e.g. fork arms or drawbars. The blanking can be used for the D.ILGT as well as for the S.ILGT. Blanking condition: The edge of the gate wings must show minimum height (see Technical data).

Circumvention protection for blanking

The ILGT is provided with an circumvention through the light grid protection, preventing an incorrect suppression of the protection field (e.g. fork lift lowers its arm within the gate path) and intentional circumvention (e.g. a person moves an object or his arm from the top to the bottom and suppresses the protection field).

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