Connecting To Power Supply; Preparing The Connection; Connection Procedure - KROHNE OPTISWITCH 5300 Handbook

Note safety instructions
Take note of safety
instructions for Ex
applications
Voltage supply
Connection cable
Connection cable
for Ex applications
OPTISWITCH 5300 C • - two-wire
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
personnel authorised by the plant operator.
•
Always switch off power supply, before connecting or disconnect-
ing the instrument.
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 following diagrams. Take
note of the general installation regulations. As a rule, connect OPTIS-
WITCH 5300 C to vessel ground (PA), or in case of plastic vessels,
to the next ground potential. On the side of the instrument housing
there is a ground terminal between the cable entries. This connection
serves to drain off electrostatic charges. In Ex applications, the instal-
lation regulations for hazardous areas must be given priority.
The data for power supply are specified in chapter "Technical data".
The instrument is connected with standard two-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.
Use cable with round cross section for instruments with housing and
cable gland. To ensure the seal effect of the cable gland (IP protection
rating), find out which cable outer diameter the cable gland is suitable
for.
•
5 ... 9 mm (0.20 ... 0.35 in)
•
6 ... 12 mm (0.24 ... 0.47 in)
•
10 ... 14 mm (0.40 ... 0.55 in)
Use a cable gland fitting the cable diameter.
In hazardous areas, use only approved cable connections for OPTIS-
WITCH 5300 C .
Take note of the corresponding installation regulations for Ex applica-
tions.
Cover all housing openings conforming to standard according to
EN 60079-1.
5.2

Connection procedure

With Ex instruments, the housing cover may only be opened if there is
no explosive atmosphere present.
Proceed as follows:
5 Connecting to power supply
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