8.3 How to utilize and combine the light grids
All standard sizes and resolution types of the light grids of the ULVT and BLVT series (category 4) as well as those of
the TLVT and ILVT (category 2) series are available as cascadable light grids and can be combined with each other. If
you combine categories 2 and 4: please refer to the safety instructions.
Cascadable light grids are slightly modified light grids with an additional connector for a secondary light curtain. They are
characterized by the letter "K" in their order code (e.g. ULVTK).
Up to 3 light curtains may be connected in series (cascaded). The cascading of the light curtains considerably reduces
the wiring expenditure. Only the master-sensor receiver is connected to the machine control and stops the dangerous
mpovement. Only the master sensor transmitter is connected to the main power supply.
The Master sensor and the light grid in the middle must each be cascadable light grids. Cascadable light grids always
require a secondary ("slave sensor") light grid, therefore the cascadable light grids are not to be used as stand-alone
light grids.
In the cascade, the last secondary light grid is always a standard light grid. This can also be used as a stand-alone light
grid.
8.4 order codes: (examples)
a. Cascading of 2 light curtains
Safety light grid with protection height 1300 mm, 14 mm resolution Master sensor: cat. 4
Safety light grid with protection height 400 mm, 30 mm resolution slave sensor: cat. 4
System Protective height / number of beams
master sensor: ULVT-K 1300 /169
slave sensor: ULVT 400 /28
b. Cascading of 3 light curtains
Safety light grid with protection height 800 mm, 400 mm resolution Master sensor: cat. 4
Safety light grid with protection height 1200 mm, 14 mm resolution slave sensor 1: cat. 4
Safety light grid with protection height 400 mm, 30 mm resolution slave sensor 2: cat. 4
System Protective height / number of beams
master sensor: ULVT-K 800 /3
slave sensor 1: ULVT-K 1200 /156
slave sensor 2: ULVT 400 /28
8 Cascading of Light Grids - Utilizable Light curtains
master sensor - receiver
cascadable
master sensor - transmitter
cascadable
slave sensor 2 - receiver
Standard system
slave sensor 2 - transmitter
Standard system
power supply and machi-
ne control
power supply
slave sensor 1 - transmitter
cascadable
slave sensor 1 - receiver
cascadable
fig 34/1
FIESSLER
E L E K T R O N I K
34
Fiessler Elektronik GmbH & Co. KG
Doku Nr. 958 Stand 22.01.2018 RK
Phone: +49 (0) 711 / 91 96 97-0 Internet: http://www.fiessler.de
Fax : +49 (0) 711 / 91 96 97-50 eMail: info@fiessler.de
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