2.1 Functions
Type
Symbol
Function
−QO/−GO−CN−
Ū
−1P/1N
NC solenoid valve for vacuum
ON/OFF with vacuum sensor and
silencer
Without vacuum
sensor
NC solenoid valve for vacuum
ON/OFF with silencer
−QS/−GN−CN−
Ū
−1P/1N
NC solenoid valve for vacuum
ON/OFF with vacuum sensor
Without vacuum
sensor
NC solenoid valve for vacuum
ON/OFF
−QO/−GO−ON−
Ū
−−1P/1N
NO solenoid valve for vacuum
ON/OFF with vacuum sensor and
silencer
Without vacuum
sensor
NO solenoid valve for vacuum
ON/OFF with silencer
−QS/−GN−ON−
Ū
−1P/1N
NO solenoid valve for vacuum
ON/OFF with vacuum sensor
Without vacuum
sensor
NO solenoid valve for vacuum
ON/OFF
−QO/−GO−CE−
Ū
−1P/1N
NC solenoid valve for vacuum
ON/OFF, solenoid valve for ejector
pulse, ejector pulse adjustable
using adjusting screw, integrated
non−return valve for maintain
vacuum", with vacuum sensor and
silencer
Without vacuum
sensor
NC solenoid valve for vacuum
ON/OFF, solenoid valve for ejector
pulse, ejector pulse adjustable
using adjusting screw, integrated
non−return valve for maintain
vacuum", with silencer
Type
Symbol
Function
−QS/−GN−CE−
Ū
−1P/1N
NC solenoid valve for vacuum
ON/OFF, solenoid valve for ejector
pulse, ejector pulse adjustable
using adjusting screw, integrated
non−return valve for maintain
vacuum", with vacuum sensor
Without vacuum
sensor
NC solenoid valve for vacuum
ON/OFF, solenoid valve for ejector
pulse, ejector pulse adjustable
using adjusting screw, integrated
non−return valve for maintain
vacuum"
−QO/−GO−OE−
Ū
−1P/1N
NO solenoid valve for vacuum
ON/OFF, solenoid valve for ejector
pulse, ejector pulse adjustable
using adjusting screw, integrated
non−return valve for maintain
vacuum", with vacuum sensor and
silencer
Without vacuum
sensor
NO solenoid valve for vacuum
ON/OFF, solenoid valve for ejector
pulse, ejector pulse adjustable
using adjusting screw, integrated
non−return valve for maintain
vacuum", with silencer
−QS/−GN−OE−
Ū
−1P/1N
NO solenoid valve for vacuum
ON/OFF, solenoid valve for ejector
pulse, ejector pulse adjustable
using adjusting screw, integrated
non−return valve for maintain
vacuum", with vacuum sensor
Without vacuum
sensor
NO solenoid valve for vacuum
ON/OFF, solenoid valve for ejector
pulse, ejector pulse adjustable
using adjusting screw, integrated
non−return valve for maintain
vacuum"
Fig.3
Circuit symbols for the functions
2.2 Switching output and switching inputs
The vacuum is monitored with the aid of a piezoresistive sensor element. The vac
uum sensor converts pneumatic pressure values and supplies electrical signals.
When the taught switching point is reached, the vacuum sensor closes a circuit,
supplying an electrical signal. This signal can be used for control functions.
The vacuum generator can be connected to higher−level systems by means of a
switching output (−1P, 1N) and switching inputs. The switching output is configured
as normally open. The output’s switching function is defined as a threshold value
comparator.
The input signals determine the actuation of the solenoid valves for control of the
compressed air and the ejector pulse.
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
OFF
Solenoid valve
1
Solenoid valve
2
Input signal
Switching
position
of solenoid valve
Fig.4
Switching characteristics of switching inputs
