Siemens FUS1010, Operating Instructions Manual, Page: 39 / 298

Connecting
5.1 Safety notes for connecting
FUS1010 IP65 NEMA 4X & IP66 NEMA 7
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Operating Instructions, 01/2013, A5E02951520-AC
DANGER
Explosion Hazard
"Flameproof enclosure" type of protection
Only open devices with type of protection "Flameproof enclosure" (e.g. FUT1010 NEMA
7) in hazardous areas when the power to the device is turned off, otherwise there is a
risk of explosion.
DANGER
Explosion Hazard
Hazardous areas
Observe the type examination certificates or the test certifications applicable in your
country if you use transmitters as category 1/2 equipment, otherwise there is a risk of
explosion.
DANGER
Explosion Hazard
Intrinsically safe circuits
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, otherwise there is a risk of
explosion.
With intrinsically safe circuits, use only certified meters appropriate for the transmitter.
DANGER
Explosion Hazard
Laying Cables
Cable for use in zone 1 and 2 must satisfy the requirements for having a proof voltage <
AC 500 V applied between the conductor/ground, conductor/shield and shield/ground,
otherwise there is a risk of explosion.
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.
DANGER
Explosion Hazard
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, otherwise there is a risk of explosion.
If a non-conforming infeed is used, the "fail-safe" type of protection will no longer be
effective.