Siemens sitrans tr200, Operating Instructions Manual

Page: 21 / 78

SITRANS TR200/TR300
Operating Instructions, 04/2007, A5E01071992-01
21
Connecting
5
5.1 General connection information
WARNING
The regulations of the test certification valid in your country are to be observed.
Electrical connection in hazardous areas
The national directives and laws for hazardous areas valid in your country must be
observed for electrical connection. In Germany these are, for example:
• Safe working regulations
• Directive for the installation of electrical systems in hazardous areas, DIN EN 60079-14
(previously VDE 0165, T1)
•
The EC-type examination certificate
Where a auxiliary power supply is required, check to ensure that it corresponds with that on
the type plate and with the test certification valid for your country.
● Sensor connection
● Auxiliary power supply:
Connect the wires for the auxiliary power supply to terminals "3 (+)'' and "4 (-)'' as shown
in the figure in chapter Auxiliary power supply/current loop 4 to 20 mA and test terminals
(Page 24), ensuring that the polarity is correct. The device is reverse polarity protected.
i.e. if polarity is reversed the device will not work but will not be damaged.
● Test terminals (Test):
Connect the amperemeter to the two test terminals "1 (+)'' and "2 (-)'' as shown in the
figure in chapter Auxiliary power supply/current loop 4 to 20 mA and test terminals
(Page 24). The 4 to 20 mA output current can now be checked.
● Connection cable:
–
Max. cable cross-section 2.5 mm
2
.
– Lay the signal cable segregated from cables with voltages > 60 V.
– Use cables with twisted wires.
– Either avoid running cables close to large electrical plant or use screened cables (if
used under NE21 conditions there is no need for cables to be screened).