DT420 E Process Indicator

Product features

  • Display in engineering units
  • 4-20 mA loop-powered
  • 3 1/2 digit LCD display
  • 15.2 mm character height
  • Easy on site configuration
  • IP 65 (front) and IP 30 (rear) protection

Product descriptions

The DT420 E Process indicators enable linear process variables to be displayed in engineering units on the control
panel. The unit is loop-powered from 4-20 mA signals, dropping less than 2 V at 20 mA.
The process indicators housed in a DIN standard 96 × 45 mm ABS case with IP 65 protection from the front and IP 30 protection from the back side. Large 3 ½ digit 15 mm character height liquid crystal display make process variables easily visible at a distance.
A label defining the appropriate engineering unit is attached to the right of the display. The unit can be set up to reverse the display „direction” (i.e. to produce a decreasing displayed value for a rising signal input) and to display a decimal point if required.
Easy on-site configuration through the front panel keypad is a major advantage of the microcontroller-based technology.
The settings of zero and end-values are non-interactive, making the configuration process rapid and simple.
The configuration parameters: scaling, decimal point position, display refresh-rate, signal filtering, etc. are stored in EEPROM.
A two level password protects the settings from unauthorised changes.

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:DC current
Measurement range:4-20 mA
Overrange:3.5-20.5 mA
Sampling rate:15 measurement / sec.
Number of averaged samples:1 / 2 / 4 / 8 / 16 / 32 (selectable)
Drop:< 2.5 V @ I=20 mA
Accuracy:0.02% @ Ta = 23 °C ±2 °C
Temperature-coefficient:±20 ppm / °C
Display:3 1/2 digit, 7 segments, decimal point and negative sign
Display unit:LCD, 15.2 mm character height
Display value assigned to 4 mA:anywhere within the range
Display value assigned to 20 mA:anywhere within the range
Decimal point:its position can be selected, or it can be switched off
Display refreshing time:0.1; 0.3; 0.5; 1.0; 2.0 sec. (selectable)
Manual controls:
Manual controls:3 membrane push-buttons on the front cover
Power supply:
Power supply:4-20 mA loop-powered, reverse polarity protected
Ambient conditions:
Operating temperature range:0 - +60 °C (-20 - +60 °C for customer request)
Relative humidity:90% (max., non-condensing)
Place of installation:cabinet, control panel
Electromagnetic compatibility (EMC)
accordance with the standard EN 61326
Immunity:industrial area
Noise emission:Group 1, Class B
General data:
Housing:panel instrument
Connection:push-in direct connection
Connection cable:0.25-1.5 mm2 (max.)
Dimensions:96 × 48 × 39 mm (width × height × depth)
Weight:0.1 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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