Pilz PSSu E S 4AI U - Manual (Page 17)

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4-1
4.1 Module features
4 Function description
4 4000 Function description Function description 4- 4.1 Module features 4100 Module features 4- 4.1.1 Functions
Functions 4- ][Funktionsbeschreibung BA Einleitung ST-AI
The module supply provides the module with voltage.
The input signals are read in, analogue prefiltered and converted into
digital signals. The resolution is 12 bits (4095 steps) and is converted
into a 16 Bit value. Additional signal processing can be defined using the
system software (see schematic representation of signal processing).
The individual steps are described in the "Configuration" section.
The input signals are transmitted to the head module via the ST module
bus. As an option the input module can send status information for each
input.
All the configuration data is stored in the head module and is assigned
to the input module on restart. This way the configuration data is re-
tained even if you change the input module.
][Funktionsdiagramm ST-AI ohne Filter
Schematic representation of signal processing:
4.1.2 Integrated protection mechanisms
Integrated protection mechanisms 4- ][Schutzmechanismen E/A-Module
When the PSSu E F PS1(-T) is used to supply the system, the module
supply is buffered for 20 ms if the supply voltage is interrupted.
][Schutzmechanismen ST-Module
The module detects the following errors:
 Start-up error
 Configuration error
 ST communication error
 Bus termination error
IN ADC
Limit
values
Data
format
ST
module
bus
Manufact.
scaling
User
scaling