AD-LU 680 GA


The AD-LU 680 GA is a programmable transmitter for measuring all parameters such as power, voltage, current or frequency in the mains. The currents are registered via external clamp-on current transformer. Any measured quantity can be allocated to each analogue outlet. The measuring ranges can be configured in wide ranges. Filters, which can be individually parameterized, supplement the adaption possibilities of the measuring task. Each switching output can be assigned to a specific function. Possible functions include, for example, Limit or pulse output for energy metering.

AD-LU 680 GA


Measurement and analog output of up to 4 signals in a three-phase mains. Easy recording of currents by external clamp-on current transformer CT. Limit indicators for monitoring of up to 2 signals in a three-phase mains. Analogue front-end for energy management systems. Registration of all relevant measuring quantities of the three-phase current network and supply of the measuring quantities via a modbus interface.

Specific characteristics

  • Measuring quantities: effective power, reactive power, apparent power, currents and voltages, frequency, power factor, energy metering
  • The currents are registered via external clamp-on current transformer.
  • Four bipolar analogue outputs as current output or voltage output, configurable per software
  • Two switching outputs as relay or opto-coupler. Functions: limiting value, window, trend, S0, monitor
  • Meter for effective energy, reactive energy and apparent energy
  • Values for each phase and they can be polled as sum
  • Output of up to four measuring quantities of the three-phase current network such as effective power, current, voltage or frequency
  • Indication of the power fed back into the network is possible via analogue output and/or switching output
  • Connection configurations: single-phase, three-phase current with/without neutral conductor, equally/unequally loaded
  • All measuring quantities can be read out via modbus
  • All measuring ranges, output ranges and device functions can be configured per software with a PC programme.

Business data

Order number
AD-LU 680 GA
Preconfigured Optional
Optocoupler outputs Optional
Current transformers, not included
KSW 50 50A / 33,3mA
KSW 100 100A / 33,3mA
KSW 200 200A / 33,3mA
KSW 400 400A / 33,3mA
KSW 600 600A / 33,3mA
Please order the required CTs with the product.
EClass 27210124
Customs tariff number / country of origin 8543 70 90 / Deutschland


Data sheet pdf en-lu680ga.pdf (506 kB)
Tender text zip (18 kB)
Instruction manual pdf man-lu680-ad-de.pdf (255 kB)
Safety instructions pdf ad-safety-instructions.pdf (43 kB)

Technical specifications

Voltage inputs
U1N, U2N, U3N Nominal 230 V AC
U1N, U2N, U3N Max 300 V AC
Current consumption per phase 0,5 mA AC
Peak load 600 V AC, 1s
Current inputs
Rated current I1, I2, I3 0 ... 33,3 mA AC
Peak load 700 mA AC, 1s
Continuous load 100 mA AC
Input resistance per phase ~10 Ohm
Analog outputs
Number 4
Current or voltage configurable
Current outputs
Max. residual ripple 40 µAss
Max. burden 400 Ohm
Maximum output range -21 ... 21 mA
Voltage outputs
Max. residual ripple 20 mVss
Min. burden 10 kOhm
Maximum output range -10,5 ... 10,5 V
Contact outputs
Closing contact 2
Switching capacity AC 250 V AC, 2A, 50Hz
Switching capacity DC 50 V DC, 2A
Optocoupler outputs
Switching capacity DC 30 V DC, 50 mA DC
Accuracy class 0,5%
Temperature influence < 200 ppm/K
Frequency influence ~0,2 %, 40 ... 60 Hz
Influence of phase angle ~0,2 %, 40 ... 60 Hz
Response time ~500 ms, 10 ... 90 %
Communication interface
Physical RS-485
Parameter 19200, 8, 1 , even
Protocol Modbus RTU
DC 20 ... 253 V DC, 5 W
AC 50 ... 253 V AC, 9 VA
Type of protection IP 20
Connection method Screw clamp
Cross section fine wire 2,5 mm2
Cross section one wire 4 mm2
Mounting DIN rail mounting
Weight ~450 g
Environmental conditions
Operating temperature -10 ... 50 °C
Storage, transport -25 ... 80 °C
Electromagnetic compatibility
Product family standard EN 61326-1
Emission EN 55011, CISPR11 Cl. B, Gr. 1
During an interference effect slight signal deviations are possible.
Electrical safety requirements
Product family standard EN 60688
Overvoltage category III
Pollution degree 2
Isolation-voltage 500 V AC
Test voltage input/output 5 kV RMS, 1 Min.
Test voltage output/supply 4 kV RMS, 1 Min.

Block and wiring diagram

AD-LU 680 GA


AD-LU 680 GA

Circuit examples

AD-LU 680 GA

CAD / CAE Daten

CAD model is not yet available for this product.

The CAD product overview can be found at:

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