KROHNE IFC 210 E-EEx EN - Manual (Page 7)

Part A System installation and start-up Sect. 1.2
05/2002 IFC 210 E 7
1.2 Power supply - Electrical connection
PLEASE NOTE !
•
Rated values: The flowmeter housings meets the requirements of IP 20 in conformity
with EN 60529.
No protection against water and moisture. If necessary, take appropriate protective
measures.
The selected creepage distances and clearances have been dimensioned in conformity with
VDE 0110 and IEC 664 for contamination category 2. Supply circuits and output circuits are
designed to meet the standards of overvoltage class II.
•
Fuse protection, disconnecting device: fuse protection for the feeding power circuit, and also
a disconnecting device (switch, circuit breaker) for isolating the signal converters must be
provided (see also Sect. 1.3.5).
Power supply 100-230 V AC (Tolerance zone: 85-255 V AC)
•
Note information on instrument nameplate: supply voltage and frequency
•
Connection diagrams for electrical connection between primary head and signal converter:
refer to Section 1.3.5.
Power supply 24 Volt AC / DC (Tolerance zone: AC 20.4 - 26.4 V / DC 18 - 31.2 V)
•
Note information on instrument nameplate: supply voltage and frequency
•
For measurement reasons, connect an FE functional ground conductor.
•
If connected to a functional extra-low voltage source (24 V AC / DC, 48 V AC), provide for
protective separation (PELV) in conformity with e.g. VDE 0100 / VDE 0106 or
IEC 364 / IEC 536, or equivalent national regulations.
•
Connection diagrams for power supply and electrical connection between primary head and
signal converter: refer to Section 1.3.5.
IMPORTANT!
For EEx versions, also pay regard to all special directions included in Sect. 6.1
and 13.
Only the EEx primary head may be installed in the hazardous area.
The signal converter must be installed outside the hazardous area!