Limit Switch Contact Assemblies Models S
/ M / I / E / P |
Download:* |
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Limit switch contact
assemblies are used for "making" (closing) or "breaking"
(interrupting) electrical or pneumatic circuits in response to the position of the pointer
of the measuring instrument, i.e. pressure gauges or thermometers.
We have mechanical contacts (i.e. standard contacts, model S, and magnetic contacts, model
M), inductive limit switches (model I), electronic limit switches (model E) and pneumatic
limit switches (model P) in our supply programme.
For pressure gauges with reed-switches, see
heading1, model RCha 63,
resp. data sheet 1219.4.pdf (German)
and 1219.4-eng.pdf (English),
and heading 1, model RSCh 63, resp. data
sheet
1619-4.pdf (German) and 1619-4-eng.pdf (English). |
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Models |
S
M |
Standard
contacts (= sliding contacts, our model S) and magnetic contacts (M) are mechanical limit
contacts for switching a nominal operation voltage of up to max. 250 V (AC or DC) and a breaking capacity of up to 10 W / 18 VA
(model S) respectively 30 W / 50 VA (model M). Depending on the model and size of the
measuring instrument, single, double, threefold or fourfold contacts are available,
compare data sheets with end number ...90, ...91 or
..19.. of the pressure gauges. |
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Applications: |
Model S:
|
–
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for small breaking capacities |
– |
for
shock and vibration free applications only |
Model M:
|
–
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suits for numerous kinds of conditions,
also when vibrations occur |
– |
for
higher breaking capacities |
Rated Voltage |
up to 250 V (AC or DC) |
|
Breaking
Capacity |
up to 10
W or 18 VA (model S) or
up to 30 W or 50 VA (model M;
at filled instruments max. 20 W / 20 VA) |
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Number
of
Contacts:
|
Gauges Sizes:
case size 63
case size 100
case size 160
case size 250
case sizes
96x96 and 144x144 |
Number:
– up to 2 x
– up to 4 x
– up to 4 x
– up to 3 x
– up to 2 x |
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Details: |
see general information leaflet
9000 and data sheet 9100 |
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Model |
I |
Inductive
limit switches with slot initiators are proximity switches in two-wire technique according
to DIN60947-5-6 resp. NAMUR. They are intrinsically safe, EEx ib IIC T6 classified and
approved for applications in potentially explosion hazardous locations zone 1 and 2 by
using an appropriate relay unit. Depending on the model and size of the measuring
instrument, single, double or threefold limit switches are available
(compare data sheets with end number ...90, ...91
or ..19.. of the pressure gauges.), and fourfold limit switches upon request. |
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Applications: |
–
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These proximity switches with high switching precision and long service life suit
for almost any kind of industrial application |
– |
also for
filled measuring instruments |
– |
also for
temporary explosion hazardous atmospheres by using the appropriate relay unit |
Rated Voltage: |
8 V DC (Ri approx. 1 kOhm) |
Current Consumption: |
>/= 3 mA (active area free,
switch function: making)
</= 1 mA (active area covered,
switch function: breaking) |
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Number
of
Contacts:
|
Gauges Sizes:
case size 63
case size 100
case size 160
case size 250
case sizes
96x96 and 144x144 |
Number:
– up to 2 x
– up to 4 x
– up to 4 x
– up to 3 x
– up to 2 x |
|
Details: |
see general information leaflet
9000 and data sheet 9200 |
|
|
Model |
E |
Electronic
limit switches model E with 3-wire slot sensor PNP are proximity switches for
operating direct current up to 100 mA (e.g. stored program systems, SPS). Depending on the
model and size of the measuring instrument, single, double or threefold limit
switches are available (fourfold upon request),
compare data sheets with end
number ...90, ...91 or ..19.. of the pressure
gauges. |
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Applications: |
– |
for direct trigger of signal inputs of SPS |
– |
for
triggering opto-electronic couplers |
– |
for
other electronic control systems |
Rated Voltage: |
10 – 30 V DC |
Switching Current: |
</= 100 mA |
|
Number of
Contacts: |
Gauges Sizes:
case size 63
case size 100
case size 160
case size 250
case sizes
96x96 and 144x144 |
Number:
– up to 2 x
– up to 4 x
– up to 4 x
– up to 3 x
– up to 2 x |
|
Details: |
see general information leaflet
9000 and data sheet 9201 |
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Model |
P |
Pneumatic
limit switches model P are provided with pneumatic slot proximity switches applying the
air-flow interrupting principle. A preamplifier transfers the low pressure signal into a
standard signal of 1.4 bar (P/P converter) resp. an electronic signal (P/E
converter).
Pneumatic limit switches are suitable for potentially explosion hazardous locations zone
0. They show a high switching precision and are relatively resistant against
vibration,
but because of their working principle they cannot be used for liquid filled
instruments.
Single and double switches are part of our supply program, but only for instruments with
nominal case sizes 100 (4"), 160 (6"), 96x96 (3.78"X3.78") or 144x144 (5.67"X5.67"), compare data sheets
with end number ...90, ...91 or ..19.. of the
pressure gauges. |
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Applications: |
–
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for air-flow using facilities |
– |
for
applications where no electric current is allowed or available |
– |
for
applications at locations with the highest classification of explosion hazard (zone 0) |
Operating
Air Pressure
(Auxiliary Energy): |
1.4 bar +/- 0.1 (20 psi +/- 2.8 psi) |
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Admission Pressure |
approx. 0.1 bar |
|
|
Output Pressure |
approx 40 mbar |
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Air Consumption |
less than 30 l/h,
resp. PP converter
40 Nl/h |
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Number of
Contacts: |
Gauges Sizes:
case size 100
case size 160
case size 96x96
case size 144 x 144 |
Number:
– up to 1 x
– up to 2 x
– up to 1 x
– up to 2 |
|
Details: |
see general information leaflet
9000 and data sheet 9300 |
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