24
APPlICATIONs
The f/I function
performs frequency to current and voltage conversion.
The output can be programmed to show period, meaning that the input
frequency can be converted to a linear time signal.
The digital outputs are used as e.g. a frequency watch for speed control or as a
window comparator having one status between 2 limits and the opposite status
outside these limits.
The f/f function
can be used for pulse division or multiplication and as a buffer
collecting fast pulse trains. The input pulses are calculated, counted in a buffer,
and sent to the output as a pulse train with the programmed pulse width.
A scale factor may be entered in all functions. Using both digital inputs, pulse
addition or subtraction are possible. This function permits readout of the actual
consumption at measurement of e.g. liquid flows forward and backward.
The frequency generator function
is used as e.g. a time base or clockgenerator.
The 2-phase encoder,
or directional f/I conversion, converts 2 90°-phased digital
inputs to an analogue speed signal with digital output for directional indica tion.
ATEX Ex units
have input for mechanical contact and NAMUR inductive
proximity sensor.
TEChNICAl ChARACTERIsTICs
INPUTs
2 programmable inputs for standard pulse generator connection.
Normally, the auxiliary supply and trigger level follow the sensor type, but these
can be programmed to other values.
At contact input, the 50 Hz filter should be applied.
The PRecon 5223 is protected against polarity reversal on input and supply.
ANAlOGUE OUTPUT
The current and voltage signals are galvanically separated from the supply and
the inputs.
The analogue current and voltage output can be scaled acc. to your choice in
relation to the digital input. Max. zero offset is 50% of selected measurement
range. Programmable response time.
Short-circuit-protected output.
When both current and voltage signals are used simultaneously, the mA loop to
ground must pass through the internal shunt.
