ELECTRICAL CONNECTIONS
4
11
SMARTMAC 200 W
www.krohne.com
09/2017 - 4005599202 - AD Ex SMARTMAC 200 en R02
4.1 General notes
The intrinsically safe equipment is electrically connected in the display and operating unit. The
circuit is designed in protection type "intrinsically safe" and galvanically isolated from ground
(test voltage
≥
500 V
eff
).
In order to avoid risks, always observe the following points when electrically connecting a device:
•
Ensure that all connecting cables conform to the valid installation standards (e.g. IEC 60079-
14) and withstand the maximum operating temperature.
•
Securely lay the connecting cables and sufficiently protect them against damage.
•
Securely connect all the cores not in use with the ground potential of the explosive area or
carefully insulate them from each other and from ground (test voltage
≥
500V
eff
).
•
Supplied blind plugs / cable entries guarantee protection against foreign objects and water
(protection category) IP66 / 67 according to EN 60529.
•
The outer diameter of the connecting cable must be within the sealing range of the cable
entry (8...13 mm / 0.31...0.51").
•
Unused cable entries are to be closed (>IP66 / 67).
Ensure that the gaskets and incised gasket ring are tight.
