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PEXXP-XXX-XXX-XXXX (en) Page 8 of 16
END OF STROKE
GENERAL DESCRIPTION
With end of stroke feedback from a pressure switch, the
solenoid can be used to cycle the pump based on known feed-
back that the pump has fully completed each stroke.
PRESSURE SWITCH OPERATION
A calibration procedure is necessary for proper operation of
the pressure switch and accurate end of stroke feedback from
the pump. The Reset ring will always have a lower pressure
value than the Set ring.
Determine the operating air pressure of the pump.
The Reset ring should be set to approximately 25% of the
operating pressure of the pump with a minimum of 10 PSI.
The Set ring should be set to approximately 50% of the
operating pressure of the pump. This value is more vari-
able depending on the specic operating conditions. The
switch may function properly at much lower values for
the Set ring if the pump is running slowly, or at lower op-
erating pressures. In general, high operating speeds and
pressures require a higher setting value of the Set ring.
Operate the pump slowly to ensure proper operation of
the pressure switch. When the pump has shifted to one
side, the yellow LED will illuminate and remain on until
the pump shifts back to the opposite side.
If the operating pressure of the pump changes, the
Set ring may need to be adjusted accordingly.
1.
2.
3.
4.
5.
SETTING / OPERATION
9.6 to
32 V
DC
1
2
Set
Reset
3
4
7
6
5
pnp
pnp
500mA
500mA
2
1
3
4
-
+
Locking Ring
Setting Rings (manually adjustable after unlocking)
LED green: supply voltage O.K.
Process connection ¼” NPT; tightening torque 25 Nm
Setting Marks
LED yellow: Set values reached, OUT1 = ON / OUT2 = OFF
Internal Thread M5
Minimum distance between Set and Reset = 2% of the
nal value of the measuring range.
To obtain the setting accuracy: Set both rings to the mini-
mum value, then set the requested value.
1.
2.
3.
4.
5.
6.
7.
PART LIST / PEXXXXXXXXXXXEX, PEXXXXXXXXXXXFX
Figure 5
Figure 6
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