2-6
Safety instructions for electric servo drives and controls
DKR Drive Controllers
DOK-DIAX03-DKR********-PR02-EN-P
2.6
Protection by protective low voltage (PELV) against
electrical shock
All connections and terminals with voltages between 5 and 50 Volts on
INDRAMAT products are protective low voltages designed in accordance
with the following standards on contact safety:
•
International: IEC 364-4-411.1.5
•
EU countries: see EN 50178/1998, section 5.2.8.1.
WARNING
High electrical voltage due to wrong
connections! Danger to life, severe electrical
shock and severe bodily injury!
⇒
Only equipment, electrical components and cables of
the protective low voltage type (PELV = Protective
Extra Low Voltage) may be connected to all
terminals and clamps with 0 to 50 Volts.
⇒
Only safely isolated voltages and electrical circuits
may be connected. Safe isolation is achieved, for
example, with an isolating transformer, an opto-
electronic coupler or when battery-operated.
2.7
Protection against dangerous movements
Dangerous movements can be caused by faulty control or the connected
motors. These causes are be various such as:
•
unclean or wrong wiring of cable connections
•
inappropriate or wrong operation of equipment
•
malfunction of sensors, encoders and monitoring circuits
•
defective
components
•
software
errors
Dangerous movements can occur immediately after equipment is
switched on or even after an unspecified time of trouble-free operation.
The monitors in the drive components make faulty operation almost
impossible. Regarding personnel safety, especially the danger of bodily
harm and property damage, this alone should not be relied upon to
ensure complete safety. Until the built-in monitors become active and
effective, it must be assumed in any case that some faulty drive
movements will occur. The extent of these faulty drive movements
depends upon the type of control and the state of operation.
LSA Control S.L. www.lsa-control.com [email protected] (+34) 960 62 43 01
