DT4240 AC Voltage Meter

Product features

  • 0-125 VAC / 0-250 VAC / 0-450 VAC (rms max.) VAC inputs
  • 5 digit LED display, 14.2 mm character height
  • 0.03% accuracy
  • 0-20 mA / 4-20 mA, galvanic isolated output
  • Min. / max. values detection
  • 2 limit-relay outputs
  • RS232 / RS485 communication, MODBUS RTU protocol
  • 96 × 48 mm panel instrument, < 50 mm built-in depth
  • 18-40 V AC/DC, 180-250 V AC/DC power supply
  • IP 65 front side protection

Type designation

DT4240 AC voltage meter type designation

Product description

The DT4240 … AC Voltage Meter enable 0-125 VAC / 0-250 VAC/ 0-450 VAC (rms max.) voltage ranges to be displayed on the control panel. Large 5 digit, 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 voltage.
The instrument is available with the following output options:

  • 2 normally open relay contacts (SPST) for limit switching or for simple control tasks
  • 0-20 mA / 4-20 mA galvanic isolated scalable current output *
  • RS232 / RS485 galvanic isolated communication output with MODBUS RTU slave protocol *.

(* either analogue or communication option can be implemented at the same time)

Easy on-site configuration through the front panel membrane keypad is a major advantage of the microcontroller-based technology. The configuration parameters: input range, voltage 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 unauthorised manipulation.
The instruments has two power supply versions: 18-40 V AC/DC (DT4240 …) or 180-250 V AC/DC (DT4240 … PS).
The DT4240 … is housed in a DIN standard 96 × 48 mm ABS case with IP 65 protection from the front and IP 30 protection from the back side, for installation on the control panel.

Technical specifications

Safety data:
The connection terminals of the supply voltages are isolated from each other, the isolation is in compliance with the standard EN 61010-1, taking into consideration the following:
Pollution level:2
Measurement category:II
Input parameters:
Input signal:AC voltage, non isolated
Rectification:True RMS
Measurement range:0-125 VAC / 0-250 VAC / 0-450 VAC (rms max.) voltage
Sampling:12 measurement / sec.
Number of averaged samples:1 / 2 / 4 / 8 / 16 / 32 / 64 (selectable)
Error of displayed value:< 0.2% (Ta = 23 °C ± 2 °C)
Temperature-coefficient:±25 ppm / °C (max.)
Output parameters:
Analogue output (optional):
Output type:1 active or passive DC current (scalable)
Range:0-20 mA / 4-20 mA
Burden:600 ohm (max.)
Error:< 0.03% (Ta = 23 °C ±2 °C)
< 0.4% (Ta = 0 - +60 °C)
Limit outputs (optional):
Outputs:2 NO SPST relays
Contact rating:30 VDC, 3 ADC / 240 VAC, 3 AAC
Communication interface (optional):
Type:RS232 or RS485 (isolated)
Protocol:Modbus RTU slave
Baud rate:300 / 600 / 1200 / 2400 / 4800 / 9600 Baud
Display:
Display:5 digit (+ values), 4 digit (- values), negative sign, decimal point
Display unit:5 digit LED, 14.2 mm character height
Displayed value:voltage, multiplied by voltage transformer ratio
Manual controls:
Manual controls:3 membrane push-buttons on the front cover
Power supply:
Power supply:18-40 V AC/DC (DT4240 ...)
180-250 V AC/DC (DT4240 ... PS)
Consumption:3.5 W / 3 VA
Ambient conditions:
Operating temperature range:0 - +60 °C (-20 - +60 °C for customer request)
Relative humidity:90% (max., non-condensing)
Place of installation:cabinet
Electromagnetic compatibility (EMC)
accordance with the standard EN 61326-1
Immunity:industrial area
Noise emission:Group 1, Class B
General data:
Housing:panel instrument
Connection:plug-in screw terminal / push-in direct connection
Connection cable:0.25-1.5 mm2 (max.)
Dimensions96 × 48 × 45 mm (width × height × depth)
Weight:0.15 kg
Protection:IP 65 (front), IP 30 (rear)
Detailed information see in operating instructions. The Manufacturer maintans the right to change the technical data!

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