Festo Генератор вакуума OVEM, дюймовый - Handbuch (Seite 66)

OVEM
66 Festo ć OVEM ć 1004b English
2.3 Switch outputs and switch inputs
The vacuum is measured with the aid of a piezoresistive sensor element with downstream electronic
evaluating unit. The measured result of In A1 is shown numerically and graphically on the display.
The vacuum generator can be connected to higher−order systems by means of two switch outputs
(Out A/Out B) or one switch output (Out A) and an analogue output (Out B), and by one switch input.
The switch outputs can be configured either as normally closed (NC) or normally open (NO) switches.
The switch function of the outputs can be configured as threshold value comparator or window comĆ
parator, except for Out A with air−save function, here the threshold value comparator is automatically
set.
The solenoid valves are actuated for controlling the compressed air and the reject pulse depending on
the input signal (In).
1
1 = suction
1
0
0
Fig. 4: Switching behaviour of switch input
Variant Diagnosis Switch output A Switch output B Switch input
−2P Message
finished
Switch output
positive−switching
Pressure sensor
outputĂA
Switch output
positive−switching
Pressure sensor
outputĂB
Switch input
positive−switching
Message
on
p
Switch output
positive−switching
Diagnostic message
−PI ć Analogue output
4
Ū 20 mA
Vacuum
−PU ć Analogue output
0Ă
Ū 10 V
Vacuum