Pilz PSSu E S 2AO U - Manual (Page 12)

Function description
Operating Manual PSSu E S 2AO U(­T)
21423­EN­03 12
4 Function description
4.1 Module features
4.1.1 Functions
Module supply
} The module supply provides the module with voltage.
Periphery supply
} The supply for the outputs is generated from the periphery supply.
} The periphery supply and the outputs are galvanically isolated.
The output signals for each output are transmitted to the output module via the ST module
bus. The resolution is 12 bits (4095 steps). Additional signal processing can be defined us­
ing the system software (see schematic representation of signal processing). The individual
steps are described in the "Configuration" section.
All the configuration data is stored in the head module and is assigned to the output module
on restart. This way the configuration data is retained even if you change the output mod­
ule.
Schematic representation of signal processing:
OUT DAC
Data
format
ST
module
bus
User
scaling Manufact.
scaling
4.1.2 Integrated protection mechanisms
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.
The module detects the following errors:
} Start­up error
} Configuration error
} ST communication error
} Bus termination error
4.2 Configuration
The module can be configured using the system software.