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Electrical installation
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PHOENIX CONTACT
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5 Electrical installation
5.1
Installation instructions
Qualified personnel
Electrical installation may only be performed by qualified personnel.
Direct/indirect contact
Protection against direct and indirect contact in accordance with VDE 0100 Part 410 must
be ensured for all components connected to the system. In the event of an error, parasitic
voltages must not occur (single-fault tolerance).
Insulation rating
The Smart Element is designed for overvoltage category II in accordance with
DIN EN 60664
-
1.
•
When selecting the equipment, please take into consideration the dirt and overvoltages
which may occur during operation.
•
If you expect overvoltages in the system, which exceed the values defined in overvolt
-
age category II, take into consideration additional measures for voltage limitation.
WARNING: Electric shock/unintentional machine startup
Make sure that the power to the system is disconnected before carrying out mounting,
removal, and installation work as this could cause a hazardous electric shock.
Unexpected machine startup during mounting, removal, and installation work may result
in death or serious injury.
The system may only be started provided that neither the station nor the system poses a
hazard.
WARNING: Loss of safety function/damage to equipment
Improper installation, e.g., due to the mismatching or polarity reversal of connections, can
result in the loss of the safety function as well as damage to equipment.
•
Take measures to prevent the mismatching or polarity reversal of connections.
•
Prevent the tampering of connections.
NOTE: Damage to contacts or malfunction during mounting or removal when
connected
Before performing work on a Smart Element, disconnect the power to the Smart Element.
This means:
•
Disconnect the connected I/O devices from the power.
•
Switch off the I/O supply voltage U
P
at the backplane in which the Smart Element is
located.
•
Disconnect the communications power supply U
L
at the bus coupler or controller.
NOTE: Damage to contacts
There is risk of the terminal points getting damaged if they are mechanically overstrained.
•
Relieve strain in the connected cables.