Siemens SITRANS F Serie Manual De Usuario página 18

Connecting
3.1 Safety notes for connecting
16
WARNING
"Flameproof enclosure" type of protection
Only open devices with type of protection "Flameproof enclosure" in hazardous areas
when the power to the device is turned off, otherwise there is a risk of explosion.
WARNING
Hazardous areas
Observe the type examination certificates or the test certifications applicable in your
country if you use transmitters as category 1/2 equipment.
WARNING
Intrinsically safe circuits
With intrinsically safe circuits, use only certified meters appropriate for the transmitter.
If a non-conforming supply unit is used, the "fail-safe" type of protection will no longer be
effective and the approval certification will be invalid.
WARNING
Laying of cables
Cable for use in zone 1 and 2 or 21 and 22 must satisfy the requirements for having a
proof voltage < AC 500 V applied between the conductor/ground, conductor/shield and
shield/ground.
Connect the devices that are operated in hazardous areas as per the stipulations
applicable in the country of operation, e.g. for Ex "d" and "nA", permanent cables must
be laid.
WARNING
Devices with the common approval "Intrinsically safe" and "Flameproof"
The following is applicable for devices with the common approval "Intrinsically safe" and
"Flameproof" (Ex ia + Ex d): Before commissioning, make sure that the type of
protection that is not suitable is permanently defaced on the nameplate to avoid
improper use.
If a non-conforming infeed is used, the "fail-safe" type of protection will no longer be
effective.
WARNING
Only commission the device after the device has been properly connected and, if
required, closed.
FUS1010 IP65 NEMA 4X
Operating Instructions, 7/2010, A5E03086486-02