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6 . 7 Emergency stop
6 . 7 .1 In the event of fire or electric shock
If there is a risk of fire, electric shock or similar, inputs
L1 and N of the BCU should be disconnected from the
electrical power supply – this should be reflected in the
wiring on site.
6 . 7 .2 Triggered by the safety interlock (limits)
The safety interlock turns off the power to the input 1,
such as in the event of low air pressure or similar.
6 .8 Fault signalling
The fault signalling contact opens, as soon as the mains
voltage fails.
6 .9 Overload protection
To protect the unit against overload by frequent cycling,
only a specific number of start-up attempts can be car-
ried out by the BCU 440. On the BCU 440, a minimum
timing cycle of 2 minutes must be ensured on site.
BCU 440 · Edition 01.17
6 .10 Installation
Recommended installation position: vertical (cable
glands pointing downwards).
When installing, ensure that there is sufficient space to
open the BCU.
From inside
Open BCU and screw on with four screws (Ø 4 mm, min.
length 15 mm).
From outside
Screw on the closed unit to the rear with 4 self-tapping
screws (enclosed).
Otherwise, mount with external securing bars or fasten-
ing set, see page 27 (Accessories).
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