Protective Guards; Mechanical Protective Guards; Software Related Protective Guards; Fig. 14: Lifting Column Protective Enclosure - Hettich LegaDrive Operating And Installation Instructions

4. Description of the product

4.3 Protective guards

Note
i
The primary safety function during height adjust-
ment is the dead man's principle with momenta-
ry contact switch.

4.3.1 Mechanical protective guards

Separating protective guards are installed on the lifting column
to protect the operator from mechanical hazards. And insulating
enclosures are installed around the system's electrical compo-
nents to protect the operator from electrical hazards.

Fig. 14: Lifting column protective enclosure

Warning
Risk of injury!
The end product may present further, previously
unforeseeable hazards.
18

4.3.2 Software related protective guards

Warning
Risk of injury!
Despite a number of software based protective
guards there is still a
risk of getting crushed in exceptional cases as
motor shutdown is not only governed by the
control unit but also by the interaction of the
mechanical and electronic components!
Shutdown sensitivity is also influenced by the
mechanical components, motor and ambient
conditions!
For this reason, the manufacturer cannot entirely
rule out this residual risk and does not accept
any liability!
The control unit contains the following software related protecti-
ve guards:
· Collision detector ISP (Intelligent System Protection) with
automatic Drive Back functionality (see Section 7.5.7)
· Low speed areas
· ON time monitor
· Safety zone
· Pedestal stop and shelf stop position
· Plug detection
Note
i
You will find a detailed description of how to use
the listed functions in the following sections.