KROHNE ALTOFLUX 2W IFM 4042K EN - Manual (Page 41)

Part C Technical data, Block diagram and Measuring principle Section 6
02/2001 ALTOFLUX 2W 41
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1 AD converter
• overdrive-proof signal processing,
processes flow peaks
up to 20 m/s (65ft/s) more rapidly and
accurately
than competition modules
• digital signal processing and sequence
control
• high-resolution Delta-Sigma A/D
converter,
digitally controlled and monitored
• high signal-to-noise ratio, signal
processing: patent pending
2 Field power supply
• The low-loss field power supply generates
the pulsed, electronically controlled DC
current for the magnetic coils of the
primary head
• The field current ensures matched to the
power, an optimum signal amplitude and
signal-to-noise separation
3 Current output, HART
®
modem
• galvanically isolated from all other
terminals, but not from power booster
• converts the digital output signal from the
µP 2 microprocessor into a proportional
current
• communication via HART®
4 Binary output
• galvanically isolated from other groups
• can be used as pulse or status output
• output (B1), terminal for up to 100 mA
• output (B2), terminal according NAMUR
(DIN 19 234)
5 Display/operator control unit
• large LCD display, 3-line
• 3 keys for operator control of the signal
converter
• connection to the internal IMoCom bus
6 IMoCom bus plug connector
• for connection of external control and test
devices
7 Power booster input