The AD-STVEX 710 GVD supply isolating amplifier is used for the intrinsically safe supply of a transmitter installed in the hazardous area. The supply isolation amplifier itself is installed as associated electrical equipment in the non-hazardous area, i.e. the safe area. The signal is galvanically isolated and transmitted to the non-hazardous area. The passive input also allows active signals from the hazardous area. The active current output, the current sink output and the voltage output facilitate the adaptation to the following signal input. The device can be operated at 24 V DC or 230 V AC.



Supply of a transmitter in the hazardous area and galvanic isolation of the signal.

Specific characteristics

  • Supply of a transmitter up to zone 0 (gas) or 20 (dust)
  • Active current sink output or current output and voltage output
  • Open-circuit detection according to Namur recommendation NE43
  • Further parameters configurable via configuration software AD-Studio
  • Detachable, coded connection terminals
  • Zero and full scale adjustment possible via front panel keys

Business data

Order number
AD-STVEX 710 GVD Ex input top
AD-STVEX 710 GVD S-388 Ex input bottom
EClass 27210120
Customs tariff number / country of origin 8543 70 90 / Deutschland


Technical specifications

Transmitter input, intrinsically safe
Feeding voltage 23V @ 4mA ... 16V @ 20mA
Maximum measuring range 0 ... 22 mA
Maximum short circuit current 68 mA
Current input, intrinsically safe
Maximum measuring range 0 ... 22 mA
Input resistance 50 Ohm
Current output, active
Maximum output range 0 ... 22 mA
Max. burden 500 Ohm
Current sink output, passive
Maximum output range 0 ... 22 mA
Max. external supply voltage 25 V DC
Max. burden (Uextern - 2V) / 20mA
Output voltage
Maximum output range 0 ... 11 V
Min. burden 2 kOhm
Transmission behaviour
Resolution input ~ 20 µA/LSB
Resolution current output ~ 20 µA/LSB
Resolution voltage output ~ 10 mV/LSB
Maximum error 0,2 % of full scale
Temperature influence ~ 50 ppm/K
Response time ~ 100 ms (10 ... 90 %)
Auxiliary voltage
Range 20 ... 120 V DC / 50 ... 250 V AC
Power consumption 1,8 W / 3,5 VA
Environmental conditions
Ambient temperature -20 ... +60 °C
ATEX II (1) G [Ex ia Ga] IIC
II (1) D [Ex ia Da] IIIC
Type examination certificate BVS 11 ATEX E 013 X
Standards EN 60079-0, EN 60079-11
EN 60079-26, EN 61241-11
Product family standard EN 61326-1
Emitted interference EN 55011, CISPR11 Kl. B, Gr. 1
Electrical safety requirements
Product family standard EN 61010-1
Overvoltage category II
Pollution degree 2

Block and wiring diagram




CAD / CAE Daten

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Display and operating elements

On: Operation LED
Steady light: Ready to operate
Flashing 2x: Keystroke
Flashing 1Hz: Invalid measured value according to NE43

Zero: Pushbutton zero
Set start of measuring range

Full: Pushbutton full point
Set end of measuring range

Zero & Full
Set measuring range to factory values

AD-PC: Configuration
Jack socket for communication with PC configuration software.
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