General Connection Notes - Siemens SITRANS TH400 Operating Instructions Manual

Connecting

5.2 General connection notes

5.2 General connection notes
Electrical connection in hazardous zones with explosive atmospheres
For electrical connection, observe the national directives and laws for hazardous areas
valid in your country. For example, in Germany, the following hold:
• the working reliability regulation;
• the directive for the installation of electrical systems in hazardous areas, DIN EN 60079
• the EC-type examination certificate.
If a power supply is required, check to see if the specifications on power supply agree with
those on the type plate and the inspection certificate valid in your country.
● Connecting the sensor, cf. chapter: Options for sensor connection assignments
● Bus connection:
● Connection cable:
20
Warning
- 14 (previously VDE 0165, T1)
(Page 24)
The transmitter is connected with its connecting terminals "1" and "2" to the segment
coupler. The transmitter acts independent of polarity.
– Max. cable cross-section 2.5 mm
– Install the signal cable separately from cables with voltages of U > 60 V;
– Use cable with twisted wires;
– Avoid getting too close to large electrical systems or use shielded cables;
– Full specification according to PROFIBUS PA or FOUNDATION fieldbus only with
shielded cables;
– Use only cable entries and covers that are approved for the relevant use;
– At an ambient temperature of T ≥ 60°C, use heat-resistant cables approved at least
for an ambient temperature at least 20 K higher.
;
2
Operating Instructions, 02/2007, A5E01018688-01
SITRANS TH400