AC Isolation Amplifier

AC-Isolation Amplifier/Limit Switch

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The AD-TV 588 GVD is used for measuring the rms value of alternating current via a built-in current transformer up to 5A or via an external clamp on / split core current transformer up to 600A. The detected current is outputted as a galvanically isolated standard current signal in the range 0 to 20 mA and as a standard voltage signal in the range 0 to 10 volts. An additional relay output can indicate a limit value or a window. All parameters such as range, output range, relay functions, limiting values, etc. can be freely set via the configuration software.


Measuring the current of single-phase loads up to 600A. Monitoring of current consumption to certain limits with hysteresis threshold by limit function. Monitoring a certain range of the current consumption by window function.


  Specific characteristics

  • Detection of the rms value of alternating currents up to 600A
  • Current and voltage output can be used simultaneously
  • Relay output, NO
  • Wide range power supply. Supply with 24V DC or 230V AC available
  • External clamp on/split core current transformers as accessory available
  • Configuration information, such as limits, input current, etc. can be adjusted by the customer via configuration software or be specified when ordering
  • Operating module as an accessory
  •   Business data

    Order number
    AC Isolation Amplifier AD-TV 588 GVD
    Accessory (optional)
    Split core current transformer 5/50/100/200/400/600 A AC
    Operating module AD-VarioControl
    USB programming adapter AD-VarioPass
    Configuration software AD-Studio



      Technical specifications

    Input current directly
    Measuring range 1 A 0 ... 1 A AC
    Measuring range 5 A 0 ... 5 A AC
    Current input via Clamp on Current Transformer
    Measuring range, Re 0 ... 1,66 mA AC, 200 Ohm
    Measuring range, Re 0 ... 16,6 mA AC, 20 Ohm
    Measuring range, Re 0 ... 33,3 mA AC, 10 Ohm
    Measuring range, Re 0 ... 66,6 mA AC, 5 Ohm
    All current inputs
    Rated frequency 50 Hz
    Frequency range 40 ... 400 Hz
    Sampling 2 kHz
    All signal outputs
    Simultaneous use Yes. Minus (terminals 10/12) may not be connected.
    Bit width D/A converter (PWM) 11 Bit
    Output current
    Maximum output range 0 ... 20 mA
    Resolution ~10 uA
    Max. burden 500 Ohm
    Output voltage
    Maximum output range 0 ... 10 V
    Resolution ~5 mV
    Min. burden 1 kOhm
    Relay output
    Maximum switching load AC 250 V, 2 A
    Maximum switching load DC 50 V, 2 A
    Contact construction closing contact
    Switching operations mechanical 10.000.000
    At 230V/2A AC, cos(phi)=1 600.000
    At 230V/2A AC, cos(phi)=0,4 200.000
    At 24V/1 A DC 200.000
    Transmission behaviour
    Maximum linearity error 0,5 % of full scale
    Rise time 0..90% 200 ms
    Temperature influence +/- 100 ppm/K
    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 3 VA / 1,5 W
    Dimensions (WxHxD) 23x110x134 mm
    With operating module (bxhxt) 23x110x138 mm
    Manner of fastening DIN rail 35mm (EN 50022)
    Type of protection IP 20
    Connector cross section max. 2,5 mm▓
    Bolting torque screw terminals 0,5 Nm
    Weight ~120 g
    Environmental conditions
    Operation 0 ... 50 ░C
    Storage, transport -10 ... 60 ░C
    Product family standard EN 61326-1 1)
    Emitted interference EN 55011, CISPR11 Cl. B
    Electrical safety requirements
    Product family standard EN 61010-1
    Galvanic isolation, test voltages
    Input/output 4 kV, 1 min
    Input, output/supply 4 kV, 1 min
    Operation green LED. Blinks when signal outside range
    Relay red LED. Lit when relay is energized
    1)During electromagnetic disturbance minor changes in output signal are possible.

      Block and wiring diagram




      Modbus Communication

    The optional AD-VarioConnect operating module has an RS-485 interface. The data is transferred via the Modbus RTU protocol, the AD-VarioConnect operating module represents a Modbus slave. Communication takes place according to the master-slave procedure and starts with a request from the master, e.g. from a PLC or a PC. Each bus participant must have a unique address. If a slave detects that its address has been addressed by the master, the slave always sends an answer. The slaves never communicate with each other. They are also not able to start a communication with the master.
    The Modbus master can read out the individual registers of the AD-TV 588 GVD via the addresses.
    The default standard data format is 19200,e,8,1 with slave address 1. These settings can be changed via the AD-VarioConnect operating module.

    Start address Number of registers Name Unit Data type read write

    áMeasured values:
    40701 2 Scaled input A AC 7 1 0
    40801 2 Output signal current mA 7 1 1
    40803 2 Output signal voltage V 7 1 1