Connecting
5.1 Basic safety notes
SITRANS F Ultrasonic flowmeters FST030 (Modbus)
Operating Instructions, 08/2017, A5E37367739-AC
33
5.1.5
Improper laying of shielded cables
WARNING
Improper laying of shielded cables
Risk of explosion through compensating currents between hazardous area and the
non-hazardous area.
May cause death or serious injury.
•
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.
5.1.6
Insufficient isolation of intrinsically safe and non-intrinsically safe circuits
WARNING
Insufficient isolation of intrinsically safe and non-intrinsically safe circuits
Risk of explosion in hazardous areas.
May cause death or serious injury.
•
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.
5.1.7
Incorrect conduit system
WARNING
Incorrect conduit system
Risk of explosion in hazardous areas as result of open cable inlet or incorrect conduit
system.
May cause death or serious injury.
•
In the case of a conduit system, mount a spark barrier at a defined distance from the
device input. Observe national regulations and the requirements stated in the relevant
approvals.