Isolation Amplifier

Current Isolation Amplifier
AD-TV 411 GS; AD-TV 412 GS

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The single or dual channel isolation amplifier of the series AD-TV 411 GS and AD-TV 412 GS 2 is being used for the galvanical isolation and amplification of impressed currents of 0-20 mA or 4-20 mA. The output current is unaffected from the connected load. The output follows the input 1:1. Input, output and supply current are separated galvanically. All channels are isolated from each other galvanically. Through its efficient wide-range power supply unit of the isolation amplifier can be operated over a wide supply voltage range with low level of intrinsic heating.


Single or dual channel burden amplification and galvanic decoupling of impressed DC current signals.


  Specific characteristics

  • Single or dual channel version available
  • Electrical 3-way isolation
  • Wide range power supply
  • Narrow width housing
  •   Business data

    Order number
    AD-TV 411 GS single-channel version
    AD-TV 412 GS dual-channel version



      Technical specifications

    Input current
    Measuring range 0 ... 20 mA or 4 ... 20 mA
    Required input voltage ca. 0,8 V
    Output current
    Output range 0 ... 20 mA or 4 ... 20 mA
    Max. burden 500 Ohm
    Residual ripple 20 ľAss
    Voltage range AC 50 ... 253 V AC, 50/60 Hz
    Nominal voltage AC 230 V AC
    Voltage range DC 20 ... 253 V DC
    Nominal voltage DC 24 V DC
    Power consumption AC / DC (AD-TV 411 GS) 3 VA / 2,5 W
    Power consumption AC / DC (AD-TV 412 GS) 4 VA, 3,5 W
    Transmission behaviour
    Basic accuracy < 0,2 %
    Temperature influence 15 ppm/K
    Response time 0,2 ms
    Load influence 0,02 % / 100 Ohm
    Dimensions (WxHxD) 23x78x103 mm
    Type of protection IP 20
    Connection method detachable terminal clamp
    Terminals, wire cross section 2,5 mm˛ flex wire / 4 mm˛ one wire
    Bolting torque terminals 0,5 Nm
    Weight ~ 160 g
    Manner of fastening 35 mm DIN rail 35mm
    Environmental conditions
    Ambient temperature 0 ... 50 °C
    Storage and transport -10 ... 70 °C (no thawing)
    Product family standard EN 61326 1)
    Emitted interference EN 55011, CISPR11 Cl. B
    Electrical safety requirements
    Product family standard EN 61010-1
    Overvoltage category II
    Pollution degree 2
    Galvanic isolation, test voltages
    Input / output 0,5 kV, 50 Hz (1 min.)
    Signal / supply unit 3 kV, 50 Hz (1 min.)
    Protection circuits
    Input electrical surge protection
    Output electrical surge protection
    Power supply Protection against overvoltage, reverse polarity, over temperature and over current
    1) During checking, slight signal deviations are possible.

      Block and wiring diagram