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Manual ibaPQU-S
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Issue 1.3
2.1 Modular concept
The modular concept of the ibaPQU-S system is based on a backplane capable of ac-
commodating the central unit plus up to 4 input/output modules (I/O). ibaPQU-S operates
as a central unit with integrated measurement and calculation algorithms and additionally
features 8 digital inputs. The central unit can be expanded by up to 4 current and voltage
measurement modules.
The following I/O modules support the measurement and calculation of power quality
parameters:
Voltage measurement modules

ibaMS4xAI-380VAC (4 analog inputs for 380 V AC)

ibaMS8xAI-110VAC (8 analog inputs for 110 V AC)

ibaMS16xAI-24V (16 analog inputs for ±24 V)

ibaMS16xAI-24V-HI (16 analog inputs for ±24 V, high impedance)

ibaMS16xAI-10V (16 analog inputs for ±10 V)

ibaMS16xAI-10V-HI (16 analog inputs for ±10 V, high impedance)
Current measurement modules

ibaMS3xAI-1/100A (3 analog inputs for 1 A AC/100 A DC)

ibaMS3xAI-5A (3 analog inputs for 5 A AC)

ibaMS3xAI-1A (3 analog inputs for 1 A AC)

ibaMS16xAI-20mA (16 analog inputs for ±20 mA)
Combination module

ibaMS4xADIO (combination module with 4 analog inputs/outputs and 4 digital in-
puts/outputs respectively; the 4 analog inputs are supported for the ibaPQU-S func-
tion, voltage or current measurement configurable)
All other I/O modules of the iba modular system are equally supported; however the
signals are transmitted as raw values only.
The raw signals and internally calculated characteristic values are sent to the ibaPDA
data acquisition system via a bidirectional fiber optic connection for visualization and
recording. Signal configuration and characteristic value selection are performed in
ibaPDA. Additionally, ibaPDA allows advanced calculations, configuring event-based
measurements based on triggers or displaying faults using an alarm function.