KROHNE IFC 090 Converter EN - Manual (Page 7)

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 classes III and II, respectively.
• 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 I and II for power supply and electrical connection between
primary head and signal converter: refer to Section 1.3.5.
24 V AC / DC (tolerance bands: AC 20 - 27 V / DC 18 - 32 V)
• 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), provide for protective
separation (PELV) in conformity with VDE 0100 / VDE 0106 or IEC 364 / IEC 536,
or equivalent national regulations.
• Connection diagrams I and II for power supply and electrical connection between primary
head and signal converter: refer to Section 1.3.5.
Connection to power
for
internal
use only
PE 100 - 240 V AC
FE 24 V AC/DC
(PE protective ground conductor)
(FE functional ground conductor)
L N
1L
∼∼
0L
∼∼
Warning: Instrument must be properly grounded to avoid personnel shock hazard.