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.
1.Determine the operating air pressure of the pump.
2.The Reset ring should be set to approximately 25% of the operating pressure of the pump with a minimum of 10 PSI.
3.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 specific 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.
4.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.
5.If the operating pressure of the pump changes, the Set ring may need to be adjusted accordingly.
Setting / Operation
| pnp | + |
|
| 9.6 to | ||
1 |
| ||
500mA 2 | 1 | 32 V | |
|
|
| DC |
| 3 | 4 | pnp |
|
| ||
Set | - | 500mA |
| ||
|
|
2 Reset 5
36
4
7
Figure 5
1.Locking Ring
2.Setting Rings (manually adjustable after unlocking)
3.LED green: supply voltage O.K.
4.Process connection ¼” NPT; tightening torque 25 Nm
5.Setting Marks
6.LED yellow: Set values reached, OUT1 = ON / OUT2 = OFF
7.Internal Thread M5
Minimum distance between Set and Reset = 2% of the final value of the measuring range.
To obtain the setting accuracy: Set both rings to the mini- mum value, then set the requested value.
PArt list / PEXXX-XXX-XXX-XxeX, PEXXX-XXX-XXX-XXFX
424 423
426
422
427
412405
404 
408
Figure 6
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