WARNING
Uncovered non-intrinsically safe circuits
Risk of explosion in hazardous areas or electric shock when working on non-intrinsically safe
circuits.
If intrinsically safe and non-intrinsically safe circuits are operated in an enclosure with the type
of protection "Increased safety Ex e", the connections of the non-intrinsically safe circuits must
be additionally covered.
● Ensure that the cover of the non-intrinsically safe circuits complies with degree of
protection IP30 or higher according to IEC/EN 60529.
● Separate connections of the non-intrinsically safe circuits in accordance with IEC/
EN 60079-14.
WARNING
Insufficient isolation of intrinsically safe and non-intrinsically safe circuits
Risk of explosion in hazardous areas.
● When connecting intrinsically safe and non‑intrinsically safe circuits ensure that isolation
is carried out properly in accordance with local regulations for example IEC 60079-14.
● Ensure that you observe the device approvals applicable in your country.
WARNING
Connecting device in energized state
Risk of explosion in hazardous areas.
● Connect devices in hazardous areas only in a de-energized state.
Exceptions:
● Devices having the type of protection "Intrinsic safety Ex i" may also be connected in
energized state in hazardous areas.
● Exceptions for type of protection "Increased safety ec" (Zone 2) are regulated in the
relevant certificate.
WARNING
Incorrect selection of type of protection
Risk of explosion in areas subject to explosion hazard.
This device is approved for several types of protection.
1. Decide in favor of one type of protection.
2. Connect the device in accordance with the selected type of protection.
3. In order to avoid incorrect use at a later point, make the types of protection that are not used
permanently unrecognizable on the nameplate.
Connecting
4.1 Basic safety notes
SITRANS FC310
Compact Operating Instructions, 01/2019, A5E44932112-AB
29