Notes for
operation
System DD11 / System DD21
50
82774 2.0
7. Notes for operation
These installation instructions do not contain all information required for the safe operation of the end
product. They only describe the installation and operation of the lifting columns as components (as
defined in the Machinery Directive as a "partially assembled piece of machinery").
7.1 General information
CAUTION
Danger of pinching/crushing injuries!
Make sure that there are no persons (especially children) or objects located in the range of
movement while the table is moving.
Delayed start-up
Note that this device switches on with a slight delay after the power cord is plugged in and voltage
is applied. Wait at least seven seconds before beginning the commissioning.
Power-on time / intermittent operations
NOTICE
The SMART/COMPACT control units have been designed for intermittent operations. Intermittent
operation is an operational mode where the drive must pause after a specified maximum period of
operation (power-on time). This protects the drive from overheating. Extreme overheating can
cause a malfunction.
The ratings plate specifies the maximum power-on time and the required pause intervals.
Avoiding electrical risks
CAUTION
Make sure that all live (current-carrying) parts of the drive system and power supply cannot be
touched. In particular, be sure that unused power and control unit connections are covered ade-
quately.
