DT4240 xx xx xx xx
8
20230503-V0
Operating principle
The input voltage is lead to the signal conditioner and
TRMS / DC converter stage. The DC voltage output of this
stage is converted by a 21 bit A/D converter into digital
value. The digital value is processed by a microcontroller.
The microcontroller drives the 5 digit LED display,
processes the front panel membrane keypad, drives the
limit relays, the analogue output and the communication
output.
Power supply
The instrument has two power supply version:
DT4240 xx xx xx:
24 VDC, 3.5 W
DT4240 xx xx xx PS:
230 V AC/DC, 3VA / 3.5 W
3.4. Adjustment
The DT4240 xx xx xx xxcan be adjusted through the 3
button front panel keypad. All configuration parameters are
stored in the instrument EEPROM for unlimited period of
time, even when the supply voltage beeng switched off.
The instrument doesn’t need any internal adjustment.
Summary of Contents for DT4240 Series
Page 1: ...DT4240 xx xx xx xx AC Voltage Meter Operating Instructions...
Page 68: ...DT4240 xx xx xx xx 68 20230503 V0 10 2 Application example Analog output option...
Page 69: ...DT4240 xx xx xx xx 20230503 V0 69 RS232 communication interface option...
Page 70: ...DT4240 xx xx xx xx 70 20230503 V0 RS484 communication interface option...
Page 71: ...DT4240 xx xx xx xx 20230503 V0 71 RS485 bus topology...
Page 74: ...DT4240 xx xx xx xx 74 20230503 V0...
Page 75: ...DT4240 xx xx xx xx 20230503 V0 75...
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