Reliability, Safety 2.6.6.3 Impact and Vibration Consider possible influences caused by motors, compres- sors, transfer lines, presses, ramming machines and vehi- cles. 2.6.6.4 Electromagnetic Interference Consider electromagnetic interference from various sources near the location of installation: motors, switching devices, switching thyristors, radio-controlled devices, welding equipment, arcing, switched-mode power sup- plies, converters / inverters. 2.6.7 Particular Sources of Interference 2.6.7.1 Inductive Actuators Switching off inductances (such as from relays, contac- tors, solenoids or switching magnets) produces overvolt- ages.
It is necessary to reduce these extra voltages to a minimum. Reducing elements may be diodes, Z-diodes, varistors or RC elements. To find the best adapted elements, we rec- ommend that you contact the manufacturer or supplier of the corresponding actuators for the relevant information. 22 E 327 GB 10.06.2003