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5 Connecting to power supply
OPTISWITCH 3100 C • Relay (DPDT)
29953-EN-210702
5 Connecting to power supply
5.1 Preparing the connection
Always keep in mind the following safety instructions:
Warning:
Connect only in the complete absence of line voltage.
•
The electrical connection must only be carried out by trained,
qualified personnel authorised by the plant operator.
•
Always switch off power supply, before connecting or disconnect-
ing the instrument.
Note:
Install a disconnecting device for the instrument which is easy to
access. The disconnecting device must be marked for the instrument
(IEC/EN 61010).
In hazardous areas you must take note of the respective regulations,
conformity and type approval certificates of the sensors and power
supply units.
Connect the voltage supply according to the connection diagrams.
The electronics module with relay output is designed in protection
class I. To maintain this protection class, it is absolutely necessary
that the earth conductor be connected to the inner earth conductor
terminal. Keep the general installation regulations in mind. Take note
of the corresponding installation regulations for hazardous areas with
Ex applications.
The data for power supply are specified in chapter "
Technical data
".
The instrument is connected with standard three-wire cable without
screen. If electromagnetic interference is expected which is above the
test values of EN 61326 for industrial areas, screened cable should
be used.
Make sure that the cable used has the required temperature resist-
ance and fire safety for max. occurring ambient temperature
Use cable with round cross-section. A cable outer diameter of
5 … 9 mm (0.2 … 0.35 in) ensures the seal effect of the cable gland.
If you are using cable with a different diameter or cross-section,
exchange the seal or use a suitable cable gland.
In hazardous areas, use only approved cable connections for OPTIS-
WITCH 3100 C.
Take note of the corresponding installation regulations for Ex applica-
tions.
Cover all housing openings conforming to standard according to
EN 60079-1.
Note safety instructions
Take note of safety
instructions for Ex
applications
Voltage supply
Connection cable
Connection cable
for Ex applications
