Festo Micromaster 420 Instrucciones De Montaje página 27

•
Disconnect from all sources of electrical power.
– Switch off the power supply before working on the circuit.
– Please note that electrical energy may be stored in individual components.
Further information on this issue is available in the data sheets and operating
instructions included with the components.
Caution!
–
The intermediate circuit of the frequency converter retains a dangerous voltage for 5 minutes
after all voltage sources have been disconnected. Therefore, wait
5 minutes before performing any work on one of the Sinamics modules
after disconnecting the frequency converter.
Caution!
–
Capacitors inside the device may still be charged even after being disconnected
from all sources of voltage.
•
Establishing and disconnecting electrical connections:
– Electrical connections may only be established in the absence of voltage.
– Electrical connections may only be disconnected in the absence of voltage.
•
Maximum permissible current loads for cables and devices must not be exceeded.
– Always compare the current ratings of the device, the cable, and the fuse.
– In the event that these are not the same, use a separate upstream fuse in order to
provide appropriate overcurrent protection.
• Only use connecting cables with safety plugs for electrical connections.
•
When laying connecting cables, make sure they're not kinked or pinched.
•
Do not lay cables over hot surfaces.
– Hot surfaces are identified with a corresponding warning symbol.
•
Make sure that connecting cables are not subjected to continuous tensile loads.
•
Device ventilation slots must not be covered! The devices must be hung in A4 mounting frames or
placed on hard, flame-resistant surfaces so that air can flow into them unhindered. The devices are
cooled primarily by convection.
•
Devices with a grounding terminal must always be grounded.
– If a grounding terminal (green-yellow laboratory socket) is available, it must always be
connected to the protective grounding. The protective grounding must always be connected first
(before voltage), and must always be disconnected last (after voltage).
– Some devices have high leakage current. These devices must be additionally grounded
with a PE conductor.
•
When replacing fuses, use specified fuses only with the correct current ratings and tripping
characteristics.
© Festo Didactic 8036953
27