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Betriebsanleitung
PZENTW
A6Z08101637795/EN1/000/B
14
[7620] ELP 319
LANGE_THO
A25000-X22-Q9-7-7620
of
DC013
20081022
Notice no.: 500000097465
33
Copyright (C) Siemens AG 1998
All Rights Reserved -
0000ZQ6U.doc
8.1.4 Electrical Connections
The flexible internal wiring matches the position of the movable contact arrangement 2 (see Figure 2).
The outdoor cable is connected to a terminal strip, which consists of commercially available series
terminals. The cable gland 18 consists of an easily detachable elbow with clamping ring and
protective-hose connector. After unscrewing the elbow, the electrical connection can be easily undone
without having to dismantle cable fittings and protective hose. The earthing terminal 20 (see Figure 2)
is designed as a threaded bolt with hexagon nuts.
8.1.5 Internal Circuitry
The ELP 319 end position detector is equipped with four or two sets of contacts.
8.2 Principle of Operation
The detector slides 9 (see Figure 2) are linked via detector rods to the point blades. Contact
arrangements 2 and 5 detect the home (end) position of the point blades. For this, contact lever
rollers engage with the notches in the detector slides.
The fixed contact arrangement 5 detects the retracted slide. It is bolted to the housing, thereby
ensuring constant fitting dimensions. The movable contact arrangement 2 detects the extended slide.
It is adjusted to a distance A (see Figure 2), which depends on the slide stroke, and bolted.
Additionally, the contact arrangements are form-locked by threaded rod 4 and four lock nuts. This
prevents the movable contact arrangement from changing its position, e.g. if the fastening bolts are
loose.
There are two possibilities for setting the required slide stroke.
For points with fixed point opening:
Set the slide stroke to nominal size of point opening with the well-proven tolerance of
±
8 mm. By
setting the stroke to nominal size, the clamp overlap of the clamp point locks is automatically
detected.
For points without fixed point opening:
Set the slide stroke to an average point opening measured on site, with a tolerance of
±
8 mm.
The required distance A between contact arrangements 2 and 5 is calculated for any slide stroke,
being it fixed or not, using the following formula:
A = 182 - Z
A
=
Distance between contact arrangements 2 and 5
182
=
Largest adjustable point opening with a tolerance of
±
8 mm (A = 0)
Z
=
Nominal size of the point opening to be detected or average point
opening measured on site at the point of attachment of the detector rod
If required by the user, settings different from those mentioned above are possible.
