Electrical Connection - Siemens SITRANS T3K PA Instruction Manual

7NG3213
2.2

Electrical Connection

WARNING
!
The regulations of the test certificate valid for your country must be
observed.
The national regulations and laws for hazardous areas valid for your
country must be observed for the electrical installation. In Germany
these are for example:
– Working reliability regulations
– the regulations for installing electrical equipment in hazardous
areas DIN EN 60079--14 (formerly VDE 0165, T1)
– the power supplied by the coupler exceeded the specified maxi-
mum in the EC patent certificate for the SITRANS T3K PA. If these
values are accidentally exceeded, the device may no longer be
connected to intrinsically safe circuits.
Only the circuits approved in the certificate of conformity may be used
for supplying power.
Connecting the sensor
see Figure 5, page 85 "Sensor pin assignment"
Power Supply
Connect the wires of the power supply to the ''+'' and ''–'' terminals (the device is
reverse polarity protected).
The following generally applies for laying the bus cable:
– Use only shielded, two-wire cables
– Only use the recommended cable types
– Lay cable separately from cable with voltages > 60 V.
– Avoid the vicinity of large electrical installations.
– The specifications only apply for properly executed installations.
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Instruction Manual
SITRANS T3K PA
C79000-B7174-C55-04