![background image](http://html1.mh-extra.com/html/ifm/pi109-series/pi109-series_operating-instructions-manual_4117365004.webp)
4
3 Functions and features
The pressure sensor detects the system pressure of machines and installations�
3.1 Applications
Type of pressure: relative pressure
Information on pressure rating and bursting pressure → data sheet.
Static and dynamic overpressures exceeding the indicated overload
pressure are to be avoided by taking appropriate measures�
The indicated bursting pressure must not be exceeded� Even if the
bursting pressure is exceeded only for a short time, the unit can be
destroyed� NOTE: Risk of injury!
4 Function
4.1 Processing of the measured signals
• The unit displays the current system pressure�
• It generates 1 output signal according to the parameter setting�
OUT
analogue signal 4���20 mA (20���4 mA)
4.2 Pressure monitoring/ analogue function
The analogue signal can be set�
• [OU2] defines whether the set measuring range is provided as a 4���20 mA
signal ([OU2] = [I]) or a 20���4 mA signal ([OU2] = [InEG])�
Scaling can also be set by means of the teaching process or by entering a value
for the ASP and AEP parameters�
• By teaching the analogue start point (tASP) or setting the parameter ASP you
define the measured value at which the output signal is 4 mA (20 mA at [InEG])�
• By teaching the analogue end point (tAEP) or setting the parameter AEP you
define the measured value at which the output signal is 20 mA (4 mA at [InEG])�
Minimum distance between [ASP] and [AEP] = 25 % of the final value of the
measuring range (turn down 1:4)�