CCS Standardfunction   DCI [A]
 

DCI [A]

MaxSignalAmplitude [V]

IntegrationPeriod [s]

Shuntresistor [Ohm]

Description of Function

Indirect measurement of current by means of integrating DC voltage measurement with AUTO triggering on a defined shunt. This function is always used when a load with integrated shunt is connected to a control unit pin and the current is to be measured on the integrated shunt. Currents flowing into the control unit register as positive.

Testing Points

The control unit pin to which the load with the integrated shunt is connected is specified as the test point and the reference point.

Parameters

MaxSignalAmplitude

Largest amplitude occurring on the signal. Can be used to establish the measurement range or to select a suppressor circuit.

IntegrationPeriod

Period over which the signal is integrated.
In the event of superimposed interference signals, it is advisable to select a multiple of the interference signal period as the integration period.

Standard value: period duration of supply voltage.

Shuntresistor

For selection of resistor value see MSL Catalogue, Implementation of Modules (Simulated Loads).

Example

DCI

1,0.02,0.1


Test circuit:



Diagram:


tID

IntegrationPeriod

tPS

Period of the interference signal

tN

Period of mains power supply

Figure 2: Indirect current measurement on a shunt