Inputs and outputs

Safe to operate even under extreme conditions

All analog and binary inputs and 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 PX analog channels are generally sampled at a rate of 200 kHz. Because of the absolutely linear frequency response, all the inputs provide high accuracy (< 0.05%) across the entire measuring range.


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

The following measurement range is available:

  1. 4 x 600 V Ph-N, 4 x 32 A, 4 x 3 V Ph-N
    (measurements on protection or measurement transformers and via external current sensors)

Binary inputs and outputs

The binary inputs are divided into 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.

Features PX:

  1. 8 binary inputs
  2. 2 groups of 4 channels
  3. Response threshold: 24...300 VDC
  4. Resolution: 0.1 ms
  5. 2 potential-free relay contacts

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 PX power quality analysers enable these measurement values to be recorded with the aid of sensor measurement inputs 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 further current measurement to be carried out which can be used for the identification and elimination of leakage currents in a plant on the basis of differential current measurements, for example.

The following analog inputs, temperature inputs and analog outputs are provided by the sensor measuring module:
4 analog inputs (sampling rate 10 kHz)

Measuring range:

  1. 10 V (sensor technology)

1 temperature input (sampling rate 100 Hz)

  1. PT 1000
  2. Measuring range - 20...80°C

1 analog output (process output)
Output signal:

  1. 0...10 V