DURAG D-R 290, Operating Manual

Page: 87 / 202

5 | Installation
D-R 290 87
Also see about this
2
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52]
Display LEDs of the control electronics
5 message LEDs and a push button are located behind the viewing window on the
front panel of the D-SK AE control electronics.
1 yel­
low
Device ready for operation in
"Stand by"
2 green "Air flow" detected
3 green Shutter opens 4 red Shutter closes
5 green "Supercap control LED"
Supercap charged
T - Button for closing the fail-safe
shutter manually (test)
Fig. 5.20: Control electronics displays
Installation protective device D-SK 290
The measuring head and reflector each require a D−SK 290 MA fail-safe shutter with
D−SK AE control electronics and F3 air flow sensor.
WARNING High risk of injury due to sudden closure of the shutter
▶
Never insert fingers into the closing area of the fail-safe shutter.
▶
Before maintenance work:
Unplug the connection plug at the measuring head for the fail-safe shutter.
(Caution,
when the connection is broken, the fail-safe shutter closes very quickly)
If several housings (e.g. for a universal operation unit and control electronics for fail-
safe shutters) are installed alongside each other, allow sufficient clearance between
them to allow the hinged parts of the housings to be swung out, according to their
height. The opening screws (for the control electronics of fail-safe shutters, on the
right hand side wall) must also be accessible. Otherwise it will not be possible to install
the housings subsequently.
For this also see the section of dimensional diagrams:
Install the control electronics as shown in the dimensional diagram (see 9.3.4 Dimen­
sional diagram of the control electronics D-SK AE [
}
186] ). Diameter of the attachment
holes: 6.5 mm. Hole spacing: 166 (top) / 162 (bottom) x 220 mm
5.5.2
5.5.3