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DT4200
Area of application
Operating principle
Power supply
20181113-V0
3.2. Principle of operation
DT4200 is an process indicator enable linear process
variables to be displayed.Two isolated outputs are available
with different operating modes for limit signaling or for
simple control purposes.
Use the enclosed seal between the instrument and the
panel when mounting the instrument to assure IP 65 from
the front.
The 4-20 mA current flows through a measuring resistor
and is converted by a 16 bit A/D converter into digital value.
The digital value is processed by a microcontroller. The user
may set up the the configuration parameters: scaling,
decimal point position, display refresh rate, signal filtering,
limit modes, limit values, etc. through the front panel
membrane keypad and the parameters stored in EEPROM.
A two level password protects the settings from
unauthorised changes.
The 4 ½-digit liquid crystal display make process variables
easily visible at a distance. A label defining the appropriate
engineering unit may be attached to the right of the display.
DT4200 has two optically isolated transistor outputs for limit
signaling or for simple control purposes.
DT4200 is loop-powered from 4-20 mA signal, dropping less
than 2 V at 20 mA.
7
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