GB-3
D
GB
F
NL
I
E
1
4
1
Positive pressure
(Rp ¼)
4
Atmospheric pressure
(Rp
1
/
8
)
Connect
Seal
Free
Positive
pressure
DG..S
1
–
–
4
If the electrical contacts in the DG..S could be
soiled by dirt particles in the surrounding air or
in the medium, use a filter pad at port
4
.
Wiring
▷
If the DG..SG has switched a voltage > 24 V
and a current > 0.1 A once, the gold plating
on the contacts will have been burnt through. It
can then only be operated at this power rating
or higher power rating.
▷
Pressure switch DG can be used in Zone 1
and 2 hazardous areas if an isolating ampli-
fier is installed upstream in the safe area as
“Ex-i” equipment pursuant to EN 60079-11
(VDE 0170-7):2007.
▷
DG as “simple electrical equipment” pursuant to
EN 60079-11:2007 corresponds to the Tempera-
ture class T6, Group II. The internal inductance/
capacitance is Lo = 0.2 μH/Co = 8 pF.
▷
In the case of low switching capacities, such as
24 V, 8 mA, for example, we recommend using
an RC module (22 Ω, 1 μF) in air containing
silicone or oil.
CAUTION
Please observe the following to ensure that the DG
is not damaged during operation:
– Note the switching capacity, see page 4 (Tech-
1
Disconnect the system from the electrical power
supply.
M16 x 1,5:
ø 4,5–10 mm
3
4
2
5
6
7
M16 x 1,5:
ø 4,5–10 mm
3
4
2
5
6
7
▷
Contacts
3
and
2
close when subject to increas-
ing pressure. Contacts
1
and
3
close when sub-
ject to falling pressure.
NO
2
NC
1
COM
3
L1
COM
3
NC
1
NO
2
Adjustment
▷
The switching point is adjustable via hand wheel.
1
Disconnect the system from the electrical power
supply.
2
Detach the housing cover, see page 3 (Wir-
3
Connect an ohmmeter.
NO
2
NC
1
COM
3
COM
3
NC
1
NO
2
0
1 cm = 1 mbar
4
Set the switching point using the hand wheel.
5
Connect a pressure gauge.
NO
2
NC
1
COM
3
COM
3
NC
1
NO
2
0
1 cm = 1 mbar
6
Apply pressure. In doing so, monitor the switch-
ing point on the ohmmeter and the pressure
gauge.
Type
Adjusting range*
[mbar]
Switching dif-
ferential**
[mbar]
DG 6
0.4 – 6
0.2 – 0.3
DG 10
1 – 10
0.25 – 0.4
DG 30
2.5 – 30
0.35 – 0.9
DG 50
2.5 – 50
0.8 – 1.5
DG 150
30 – 150
3 – 5
DG 400
50 – 400
5 – 15
DG 500
100 – 500
8 – 17
* Adjusting tolerance = ± 15% of the scale value.
** Mean switching differential at min. and max. setting.
▷
If the DG does not trip at the desired switch-
ing point, correct the adjusting range using the
hand wheel. Relieve the pressure and repeat
the process.
