Principle Of Operation - Datcon DT4260 Series Operating Instructions Manual

DT4260 xx xx xx xx
Area of application
20111006-V0

3.3. Principle of operation

The DT4260 xx xx xx xx AC Current Meter enable
0-1 AAC / 0-5 AAC current ranges to be displayed on the
control panel. Large 14.2 mm height LED display make
process value easily visible at a distance. The displayed
value is proportional to the True RMS value of the input
current.
The input current to be measured should be connected to
the instrument's input shunt through a current transformer.
Easy on-site configuration through the front panel
membrane keypad is a major advantage of the
microcontroller-based technology. The configuration
parameters: input range, current transformer ratio, signal
filtering, output scaling, display refresh rate, limit modes,
limit values, etc. are stored in EEPROM. The settings are
protected by a two-level password against unauthorized
manipulation.
Options:
•
Two normally open relay contacts (SPST) for limit
switching or for simple control tasks.
•
4-20 mA / 0-20 mA galvanic isolated scalable analogue
output. The output can be active (A) or passive (P).
•
RS232 galvanic isolated communication output with
MODBUS RTU slave protocol. Only one instrument can be
connected to the PLC or to the computer.
•
RS485 galvanic isolated communication output with
MODBUS RTU slave protocol. 32 instrument can be
connected to the PLC or to the computer.
Note: either analogue or communication option can be
implemented at the same time.
7