KROHNE IFC 020 Converter EN - Manual (Page 7)

Installation and operating instructions IFC 020 1/2
Connection to power 1.2
PLEASE NOTE !
• Rated values: The flowmeter housings protecting the electronic equipment from dust
and moisture must always be kept closed. 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.
• Safety isolation: the flowmeters (signal converters) must be provided with an
isolating facility.
1. AC Version 2. AC Version
230/240 V AC (200 - 260 V AC) 200 V AC (170 - 220 V AC)
switch-selectable to switch-selectable to
115/120 V AC (100 - 130 V AC) 100 V AC (85 - 110 V AC)
• Note information on instrument nameplate: supply voltage and frequency
• The PE protective ground conductor for the power supply must be connected to the
separate U-clamp terminal in the terminal compartment of the signal converter.
For exceptions (compact systems), refer to installation instructions for the primary head.
• Connection diagrams for electrical connection between primary head and
signal converter: refer to Section 1.3.5 and 1.3.6.
DC Version (in preparation for IFC 020 E)
24 V DC (18 - 32 V DC)
• Note information on instrument nameplate: supply voltage and frequency.
• For measurement reasons, connect an FE functional ground conductor to the separate
U-clamp terminal in the terminal compartment of the signal converter.
• If connected to a functional extra-low voltage source (24 V AC / DC, 48 V AC),
provide for protective separation (PELV) in conformity with 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 1.3.6.
Connection to power (K- and F- versions only)
Power fuse F1
(see Sect. 8.2)
AC: 100 – 240 V
DC: 24 V
Power supply U-clamp terminal
PE protective conductor
FE functional ground conductor
L N
1L = 0L =
for
internal
use only
For electrical connection of the IFC 020 E power supply see Section 1.3.6,
connection diagrams III to VI.