Inputs and outputs

EPPE CX is equipped with one analog and one binary measuring module. A sensor measuring module is available as an extra option.

Safe to operate even under extreme conditions

All analog and binary outputs and all interfaces are galvanically isolated and meet stringent occupational health and safety requirements. Their excellent immunity to electro-magnetic disturbances ensures smooth operation even when conditions are extreme.

Analog inputs

EPPE CX comes complete with 8 analog channels with a general sampling rate of 200 kHz. Because of the absolutely linear frequency response, all the inputs provide high accuracy (< 0.05%) across the entire measuring range.

The device is available with 3 different measurement ranges:

  1. 4 x 600 V Ph-N, 4 x 40 A (measurements on protection or measurement transformers)
  2. 4 x 600 V Ph-N, 4 x 600 V Ph-N (measurements on 2 voltage systems)
  3. 4 x 600 V Ph-N, 4 x 3 V Ph-N (measurements via external current sensors)


  1. 16 bit A/D converter
  2. Sampling rate 200 kHz
  3. Accuracy < 0.05% (of range)
  4. Overcurrent-protected up to 500 A for max. 1 sec.

Binary inputs and outputs

The device has 14 binary inputs and 8 relay outputs. The binary inputs are divided into 2 groups, each of which has a common reference point.

The special input circuitry of the binary inputs is designed for operation with voltages between 24 V and 300 V and effectively suppresses the detection of transients which can be caused by switching operations, for example. 

Freely configurable relay outputs can be used for the indication of status signals, alarm signals or limit value violations to control systems, for example.


  1. 14 binary inputs
  2. 2 groups of 7 channels
  3. Response threshold: 24...300 VDC
  4. Resolution: 0.1 ms
  5. 2 potential-free relay contacts
  6. 6 electronic relay outputs

Sensor measuring module

The storage and analysis of environmental factors are becoming increasingly important for measuring systems which are used for monitoring and analysis, particularly for those used in renewable power generating systems (PV systems, wind power plants, etc.).

Factors such as light irradiation, ambient temperature, module temperature, humidity, wind speed, wind direction, sound intensity, generator temperature, etc. can provide helpful information for analysis or fault diagnostics.

The EPPE CX power quality analyser enables these measurement values to be recorded with the aid of a sensor measuring module and can issue alarm signals to the user if pre-defined limit values are exceeded. In the case of a malfunction, this additional measurement data is helpful for the purposes of analysis and for the development of remedial measures. The sensor measurement inputs also allow another current measurement to be carried out which can, for example, be used for the identification and elimination of leakage currents in a plant on the basis of differential current measurements.

The sensor measuring module features 8 analog inputs which are divided into 2 groups, each with a different sampling rate and different options for the measuring ranges. This module also provides 2 temperature inputs and 1 analog output (process output).

Measuring ranges:

4 analog inputs (sampling rate 200 kHz)

Measuring range can be selected:

  1. 300 V (voltage measurement, sensor technology)
  2. 10 V (sensor technology)
  3. 2 V (current sensors, current clamps)
  4. 20 mA (sensor technology)

4 analog inputs (sampling rate 100 Hz)

Measuring range can be selected:

  1. 10 V (sensor technology)
  2. 20 mA (sensor technology)

2 temperature inputs (sampling rate 100 Hz)

  1. PT 100, PT 500, PT 1000
  2. Measuring range -50…120°C

1 analog input (process output)

Output signal can be selected:

  1. 0…10 V
  2. 4…20 mA