Siemens FC300 - Page 59

WARNING
Unprotected cable ends
Risk of explosion through unprotected cable ends in hazardous areas.
● Protect unused cable ends in accordance with IEC/EN 60079-14.
WARNING
Improper laying of shielded cables
Risk of explosion through compensating currents between hazardous area and the
non‑hazardous area.
● Shielded cables that cross into hazardous areas should be grounded only at one end.
● If grounding is required at both ends, use an equipotential bonding conductor.
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.
Connecting
5.1 Basic safety notes
MASS 2100 & FC300 (FCT030)
Operating Instructions, 06/2017, A5E39789040-AA 59