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951-150-032-EN
Version 04
EN
3. Overview, functional description
3.2 Design
The universal piston detector
234-13163-9 and the bipolar piston detec-
tor 234-11454-1 are position sensors that,
together with the respective pressure-re-
sistant adapter, are screwed into the feeder.
Through the closed adapter, the sensors
detect the feeder piston without coming into
direct contact with it.
Hydraulic pressure spikes therefore do not
act directly on the front sensor surface the
piston detectors.
There are different adapters depending on
the feeder series. These differ in terms of
thread size and clearance. They are specifi-
cally tailored to the respective feeder type
and piston type.
The piston detectors automatically detect
the clearance between the feeder piston and
the piston sensor following several feeder
strokes and adjust themselves automatically.
The universal piston detector automatically
detects the customer’s plug/cable assign-
ment, 2-wire design or 3-wire design (with
cable break protection).
The universal piston detector is not suitable
for usage in vehicles with KFGS or KFGL
lubrication pump due to an undefined pin
assignment. The bipolar piston detector is to
be used in this case.
The bipolar piston detector is available only
in a 2-wire design. The signal voltage can be
applied to either pin 1 or pin 4.
3.2.1 Function
When the piston detector is actuated (piston
stroke), a yellow LED lights up and indicates
correct functioning of the piston detector.
If a piston detector with adapter is already
installed, the piston detector can be replaced
subsequently during operation. The adapter
must not be removed while removing the
existing piston detector!
Problems cannot occur in the stopper pres-
sure range of the sensor surface/feeder.
The piston detectors are available with a
corresponding adapter and cable harness
(cable harness only on feeder series SSV/
SSV D) as a replacement for all previous de-
tectors of feeder series PSG1, PSG2, PSG3,
VP, VPK, VPB, SSV, and SSV D.
