9
October 2010
AUTOMATIKPRODUKTER
AUTOMATIKPRODUKTER
ATEX – Duct Smoke Detector
5
Technical data
LRS 04 Ex
Field of application
Round and rectangular ventilation duct with
potentially explosive atmosphere of zones 1 and 2
Functional principle
Scattered light
Smoke switch
ORS 221 Ex
Response threshold
According to the construction and testing princi-
ples for tripping devices for smoke (12/76)
Min. air flow
1 m/s
Max. air flow
20 m/s
Openings
2 x Ø 28-30 mm/150 mm distance for installation in
housing 3 x max. 6 mm or 3 pairs of openings for
passing through 3 tensioning straps
Current consumption with 28 V DC
Quiescent
In alarm
In case of a failure
Relay contact in Ex interface
Max. switching voltage
Max. switching current
Switching power max.
Max. 12 mA
Max. 1.8 mA
Max. 2.7 mA
30 V DC/30 V AC
1 A
30 W
Inlet tube
Standard length in the channel 344 mm
bore diameter Ø 28-30 mm
Temperature range of operating environment
–20 °C to +70 °C
Degree of protection according to EN 60529
IP 54 (on duct surface)
IBExU certificate number ORS 142 Ex interface
IBExU 04 ATEX 1105
Colour
Blue, black, white and transparent
Materials
PC/polyester/aluminium tube
Installation
On round and rectangular ventilation ducts
Cable entry
2 ATEX glands M16 x 1.5 with Ø 4-8 mm and
1 mushroom plug
Dimensions without pipe
See dimensioned drawing (Fig. 9-01)
Weight of ventilation-duct smoke switch system
2740 g
(incl. inlet tube and ORS 221 Ex)
Equipotential bonding connection
M6