Siemens SITRANS TH400 Operating Instructions Manual page 21

Zone 0 and Zone 1 in type of protection "i" - intrinsic safety
● Only connect the transmitter, in accordance with the certificate of compliance, to devices
● If the connection head is made of aluminum, the requirements of EN 60079-26, section
● Be sure to observe the permissible electrical parameters specified in the test certificate.
Zone 2 in type of protection "nL" - limited energy resources
● Install the transmitter in a housing meeting the degree of protection IP54 per EN 60529,
● Connect the transmitter only to devices that have been approved as "nL" certified devices
● Be sure to observe the permissible electrical parameters specified in the test certificate.
Zone 2 in type of protection "nA" - non-sparking resources
● Install the transmitter in a housing meeting the degree of protection IP54 per EN 60529,
● Adhere to the conditions for installers applicable to this type of protection.
● The maximum approved input voltage is U
● Take measures to ensure that the supply voltage (including transients) does not rise
Additional requirements for use in dust explosion protected areas
Install the transmitter in an enclosure suitable for the respective type of dust and
corresponding Zone in accordance with the inspection certificate valid in your country.
SITRANS TH400
Operating Instructions, 06/2010, A5E01018688-02
certified as intrinsically-safe.
4.3.3, must be observed for uses where the device category 1 G is required.
e.g. in a type B connection head per DIN 43729.
(limited energy resources) in category 3.
e.g. in a type B connection head per DIN 43729.
above 140 % of the rated voltage.
5.1 Safety information on connecting up
= DC 32 V.
n
Connecting
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