KROHNE IFC 110 Converter - Manual (Page 93)

Part D Technical Data, Measuring Principle and Block Diagram Sect. 12
05/2003 IFC 110 F 93
12 Block diagram
| FSV printed circuit board, field current supply
(terminals 7 and 8)
• Large signal-to-noise ratio owing to low-loss
field current supply with high frequencies and
high currents.
• Pulsed direct current which is precisely
controlled electronically, for the magnetic coils
of the flow sensor.
• Operating and calibrating data are stored in an
EEPROM so that the PCB can be easily
replaced without the need for re-calibration.
} BDE printed circuit board, motherboard
• Large illuminated LC display.
• 15 keys for operator control of signal converter
• Can be retrofitted with optional operator
control by bar magnet.
• Distribution of general signals such as
IMoCom bus, power supply.
~ I/O printed circuit board, inputs and outputs
• Groups, inputs and outputs are galvanically
isolated from each other and from all other
circuits.
• Power supply source for the inactive inputs
and outputs.
• Specific KROHNE circuit KSA 04 for fine
quantization of output pulses across a wide
dynamic range.
• Active current output I (e.g. 0/4-20 mA) with
load control.
• Pulse output P for electronic totalizers, max.
10 Hz.
• Pulse output A1 for electromechanical
totalizers, max. 50 Hz, can also be used as
status output A1.
• Several status outputs A1, A2, D1, D2.
• Control inputs C1 and C2.
{ ADC printed circuit board, analog / digital
converter (terminals 1, 2, 3, 20 and 30) 
• Signal processor protected against overload,
for quick and precise processing of flow
peaks up to and exceeding 20 m/s or 60 ft/s.
IMoCom bus plug
Connecting external operating and testing devices,
e.g. RS 232 adapter and CONFIG software for
operator control of signal converter by MS-DOS
PC or laptop.
• Digital signal processor, sequential control
and test routines.
€ Slots for plug-in modules, for upgrading or
converting the signal converter
• Patented high-resolution analog/digital
converter, digitally controlled and monitored.
• Input amplifier allowing control of potential of
signal line shielding (bootstrap).
• User parameter and internal calibration
values are stored in separate EEPROMs
(easily replaceable).
• HART / RS 485 ancillary board
• GTEX ancillary board for Ex-i operation of the
signal converter outside hazardous areas.
• Other modules and ancillary boards in
preparation.