AC voltmeter DT4240

digitalpanel-mountwith analog output

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
• 24 VDC ±10%, 230 V AC/DC ±10% power supply
• IP65 front side protection

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: 24 VDC ±10% (DT4240 …) or 230 V AC/DC ±10% (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 specification
Safety data: The connection terminals of the supply voltages are isolated from each other, the isolation is in compliance with EN 61010-1, 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: 24 VDC ±10% (DT4240 ...), 230 V AC/DC ±10% (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:

• Interference emission: Group 1, Class B
• Interference immunity: industrial environment

General data:

• Housing: panel instrument
• Connection: plug-in screw terminal / push-in direct connection
• Connection cable: 0.25-1.5 mm2 (max.)
• Dimensions / weight: 96 × 48 × 45 mm (width × height × depth) / 0.15 kg
• Protection: IP65 (front), IP30 (rear)

Detailed information see in operating instructions. The Manufacturer maintans the right to change the technical data!