KROHNE IFC 090 Converter EN - Manual (Page 76)

12/1
12 Block diagram – signal converter
1 Input amplifier
• overdrive-proof signal processing, processes flow peaks up to 20 m/s (65 ft/s) and more
rapidly and accurately
• digital signal processing and sequence control
• patented, high-resolution A/D converter, digitally controlled and monitored
• high signal-to-noise ratio through low-loss field power supply with high frequencies
and currents
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 high field current ensures a high signal level
3 Current output
• galvanically isolated from all other groups
• converts the digital output signal from the
µ
P 3 microprocessor into a proportional current
4 Binary outputs and/or inputs
• galvanically isolated from other groups
• selectable input/output combinations
• pulse output (B1), passive FET optocouplers allow connection of electronic and
electromechanical totalizers
• status output (B2) for limit value, error identification, or flow direction in forward/reverse
flow mode (F/R) or measuring range identification in BA mode
• both outputs can also be used as control inputs
5 Display/operator control unit (option, D Version)
• large-size illuminated LC display
• 3 keys for operator control of the signal converter
• connection to the internal IMoCom bus
• unit can be retrofitted to basic devices (B Version)
6 IMoCom bus plug connector for connection of external control and test devices such as:
• adapter and CONFIG software for operation via MS-DOS PC
internal IMoCom-Bus