Siemens FUG1010 IP65 NEMA 4X Operating Instructions Manual page 16

Hazardous area safety requirements
It is required that:
● Electrical connections are in accordance with EN60079-14 (Installing Electrical Systems
● The protective cover over the power supply is properly installed. For intrinsically safe
● Appropriate cable connectors are used for the output circuits:
● Sensor and transmitter are connected to the potential equalization.
● When protective earth (PE) is connected, no potential difference between the protective
FUG1010 IP65 NEMA 4X
Operating Instructions, 01/2013, A5E02951519-AC
in Explosion Hazardous Areas).
circuits the connection area can be opened.
– Intrinsically safe: blue
– Non-intrinsically safe: black
For intrinsically safe output circuits potential equalization must be maintained along the
entire connection path.
earth (PE) and the potential equalization (PA) can exist, even during a fault condition.
WARNING
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.
WARNING
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.
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
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.
If a non-conforming infeed is used, the "fail-safe" type of protection will no longer be
effective.
Safety notes
2.4 Installation in hazardous area
15