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Operating Instructions
Chapter
5
UE4155
8010178/TF82/2010-03-05
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
27
Subject to change without notice
Electrical installation
5
Electrical installation
Switch the entire machine/system off line!
While you are connecting the UE4155 or linking it to other devices, the equipment might
be activated inadvertently.
Ensure that the entire machine/system is disconnected during the electrical
installation.
The UE4155 bus node meets the interference suppression requirements (EMC) for
industrial use (interference suppression class A). When used in residential areas it can
cause interference.
To safeguard the resistance to disruptions, functional earthing FE must be connected.
The device is configured for Protection class III. The voltage supply must therefore be
provided with a safety extra-low voltage.
The external voltage supply must be capable of buffering brief mains voltage failures of
20 ms as specified in EN 60 204.
When using the bus node in accordance with the requirements in UL 508, the power
supply must permit “use in class-2 circuits”. No current may be allowed to flow that
is > 8 A.
In principle, it is permitted to make all connections only when the power supply is
switched off. The configuration connection, however, may be connected/disconnected
with the system on line.
Always protect unused connections by using the protective caps which can be obtained
as accessories (see chapter 11.2 “Accessories” on page 62). The bus node will other-
wise no longer comply with Enclosure rating IP 67.
Only connect all devices to the bus node radially. This will exclude earth and/or ground
circuits. If you operate several devices on the bus node or use a separate power supply
for connected devices, you must prevent earth and/or ground circuits from occurring as
the result of the connection.
Test the wiring after any activities have been carried out on the bus node!
Because the bus node has several connections of a similar structural nature, these may
result in incorrect cut-off paths, for example if connection plugs are confused.
Mark all connecting wires and connection plugs unambiguously to avoid confusion.
Test the wiring again after any maintenance or other activities have been carried out on
the bus node.
WARNING
Notes
WARNING