KROHNE IFC 050 Converter EN - Manual (Page 29)

ELECTRICAL CONNECTIONS
4
29
IFC 050
www.krohne.com 08/2013 - 4002184002 - MA IFC 050 R02 en
4.6 Grounding the measuring sensor
• The measuring sensor must be properly grounded.
• The grounding cable should not transmit any interference voltages.
• Do not use the grounding cable to connect any other electrical devices to ground at the same
time.
• The measuring sensors are connected to ground by means of a functional grounding
conductor FE.
• Special grounding instructions for the various measuring sensors are provided in the
separate documentation for the measuring sensor.
• The documentation for the measuring sensor also contain descriptions on how to use
grounding rings and how to install the measuring sensor in metal or plastic pipes or in pipes
which are coated on the inside.
4.7 Connecting the power supply
• The housings of the devices, which are designed to protect the electronic equipment from
dust and moisture, should be kept well closed at all times. Creepage distances and
clearances are dimensioned to VDE 0110 and IEC 664 for pollution severity 2. Supply circuits
are designed for overvoltage category III and the output circuits for overvoltage category II.
• Fuse protection (I
N
≤ 16 A) for the infeed power circuit, and also a separator (switch, circuit
breaker) to isolate the signal converter must be provided.
CAUTION!
There should be no difference in potential between the measuring sensor and the housing or
protective earth of the signal converter!
DANGER!
• To protect operators from electrical shock, during installation the cable for the power supply
must
must must must be run with sheathing insulation up to the mains cover. The insulated individual wires
have to be only below the mains cover!
• If there is no mains cover or if it has been lost, the 100...230 VAC device may only be operated
from the outside (with a bar magnet) while closed!