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PRESYS
⏐ Instruments
1.0 - Introduction
1.1 - Description
PRESYS DMY-2030-F and DMY-2030-F Light Indicators are microcontroller-
based instruments which show process variables generated by frequency sensors such
as magnetic pickups, tachogenerators, inductive, capacitive or optical proximity switches,
intrinsic safety NAMUR type sensors (DIN-19234) etc.
They can communicate with computers by means of an optional communication
module RS-232 or RS-422/485.
DMY-2030-F
DMY-2030-F Light Indicator monitors one frequency input for signals of sinusoidal,
squared or triangular waveforms and all pulses with amplitude between 300mV
30V
(Volt peak-to-peak) or input from contact closures. The input frequency ranges
p-p
from 0Hz to 30kHz. The indication on the display is user-configurable, which allows the
process variable to be shown in engineering units (rpm, Hz, etc.).
All configuration data can be protected by password and are stored in non-volatile
memory in case of an external power failure.
For each input there is a 24Vdc voltage source for frequency sensor excitation,
isolated from outputs and with protection against short-circuit.
According to modularity design concept, the Indicators accept up to four output
modules. The types of output are: retransmittion, SPDT relay, SPST relay and open
collector voltage. The outputs are isolated from the inputs.
They accept 90 to 240Vac or 130 to 340Vdc (with any polarity) power supply.
The instruments have extruded aluminum case which avoids electrical noise,
electromagnetic interference, radiofrequency interference, etc. and their robust
construction makes them tough enough for the most hostile environment.
PRESYS
LD1
Enter
Down
Fig. 1 - DMY-2030-F and DMY-2030-F Light Indicators front panels
Indicator
is
able
DMY-2030-F
LD2
Up
DMY-2030-F / DMY-2030-F Light
to
monitor
two
PRESYS
LD1
Place for sticking
the Engineering
Unit Label
frequency
inputs
p-p
DMY-2030-F Light
LD2
Introduction
Page 1
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and
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