Dungs GW A4 Series Manual - Página 2

Procurar online ou descarregar pdf Manual para Interruptor Dungs GW A4 Series. Dungs GW A4 Series 12 páginas. Compact pressure switch for gases and air
Também para Dungs GW A4 Series: Manual de instruções (12 páginas), Manual de instruções (12 páginas), Manual de instruções (16 páginas), Manual (13 páginas)

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Dungs GW A4 Series Manual
Functional description
Single-acting pressure switch or pres-
sure limiter in pressure range.
The pressure switches and/or pres-
sure limiters work without using any
auxiliary power.
GW A4 pressure switch
The control unit responds to pressure.
If the set reference value is exceeded
or undershot, the circuit is switched
on, off or over.
GW A4 switching function
As pressure rises:
1 NC opens, 2 NO closes
As pressure falls:
1 NC closes, 2 NO opens
2
COM
3
1
p
Definition of switching difference
The switching difference ∆p is the
pressure difference between the up-
per and lower switching pressures
ÜB A4, NB A4 pressure limiters
The control unit responds to pressure.
Interlock is performed when the set
reference value is exceeded or under-
shot.
The "Locked" switching state is indi-
cated by a glow lamp.
Restart is only possible by activating
the reset button on the setting wheel of
the pressure limiter after the operating
pressure is attained.
ÜB A4: Switches and locks when the
set pressure is exceeded.
NB A4: Switches and locks when the
set pressure is undershot.
ÜB A4 switching function
As pressure rises
2 NO closes, 1 NC opens
Glow lamp ON, locked.
NO
COM
3
NC
∆
p
Pressure
at meter
2
NO
1
NC
p
N
Setting tolerance
Double pressure switch
GW A4 / GW A4
Combination of two GW A4 single pres-
sure switches flanged together. The
setting of the two reference values is
performed separately and independ-
ently. This permits a combination of
different reference value setting rang-
es. The same medium and pressure
are applied to the two control units.
NB A4 switching function
As pressure falls
2 NO opens, 1 NC closes
Glow lamp ON, locked.
2
NO
COM
1
NC
3
p
N
Operating state
Upper switching
pressure
Lower switching
pressure
2 ... 6