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control units et 4d2

Control Unit Et- 4d2


Number of Transmitters:
  • 1 to 4 (4-20 mA)
Signal Processing:
  • Microcontroller with A/D-Converter
  • Illuminated graphic display (160 x 80) for indication of measured values, messages and alarms
  • 12 (3 x 4) red LEDs for alarm indication
  • LEDs for indication of channel fault (4 x yellow), channel operation (4 x green), operation (1 x green), device fault (1 x yellow)
User Interface:
  • Menu guided system via graphic display and keys
  • Completely configurable at device, no tools needed
  • 3 password protected servicing levels
Alarm Evaluation:
  • 3 freely adjustable alarm levels per channel
  • Monitoring: over-scale, under-scale or min/max
  • Latching of each alarm configurable
Relays, potential free:
  • 12 change-over contacts 230 V / 5 A (total power consumption: max. 10 A), freely configurable with Alarm 1 to 3 and transmitter fault
  • 2 change-over contacts 230 V / 5 A for maintenance mode and device fault
Additional Features:
  • Adjustment of zero point and sensitivity of measuring channels
  • RS 232/RS 485-Interface for communication with external periphery (PC or PLT-System)
  • Key switch function (maintenance mode)
  • Horn reset
  • Alarm reactivation
  • 4 Digital inputs, potential free
  • 4 Analog outputs 4-20 mA/0-10 V, potential free (only ET-4DA2)
Operation Temperature:
  • -10 °C to +40 °C, Humidity: non condensing
Storage Temperature:
  • -25 °C to +60 °C, Humidity: non condensing


  • ProfiBus, ModBus, Ethernet connection, Visualisation ET-View, …(with integrated ProfiBus DP-Module: ET-4DP2, 24 V (Art. 315010))
All control units of the ET-Series could be used in combination with all ExTox Transmitters ExSens(-I) and Sens(-I)
Our control units in combination with the ExTox Transmitters comply with the requirements of EN 60079-29-1, EN 45544-1 to EN 45544-3 and EN 50104 for Gas Detection Systems. Furthermore are those in conformity to the European Directives 2014/34/EU (ATEX), 2014/30/EU (EMV), 2014/35/EU (LVD).


  • 230VAC or 24VDC
  • Wall mounted housing
  • DIN rail
  • Control panel
  • 19” Rack
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