Functions And Features; Function; 4�1 Processing Of The Measured Signals; 4�2 Switching Function - IFM Electronic efector500 PQ08 Series Operating Instructions Manual

3 Functions and features

The unit monitors the system pressure in pneumatic and compressed air networks
of machines and plants�
Applications
Compressed air (other media on request)
Type of pressure: relative pressure
Order no.
PQ0809
PQ0834
Avoid static and dynamic overpressure exceeding the given overload pres-
sure 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
may be destroyed. NOTE: Risk of injury!

4 Function

4.1 Processing of the measured signals
• The unit displays the current system pressure.
• It generates 2 output signals according to the parameter setting�
OUT1 • Switching signal for system pressure limit value�
2 options
OUT2 • Switching signal for system pressure limit value�
• Diagnostic signal (output 1 is inactive in case of a fault)�
4.2 Switching function
OUTx changes its switching state if it is above or below the set switching limits
(SPx, rPx). The following switching functions can be selected:
• Hysteresis function / normally open: [oux] = [Hno] (→ fig. 1).
• Hysteresis function / normally closed: [oux] = [Hnc] (→ fig. 1).
First the set point (SPx) is set, then the reset point (rPx) with the requested differ-
ence�
4
Measuring range
bar PSI
-1���1 -14�5���14�5
-1���10 -14�5���145
Permissible
overpressure
bar PSI
20 290
20 290
MPa = bar ÷ 10 / kPa = bar × 100
Bursting pressure
bar PSI
30 435
30 435