DUK EX-Proof Lever Limit Switch, ATEX Zone 21 LHPE-10/2EX-R
NEW Item
Manufacturer Part Number: LHPE-10/2EX-R
Variant with Contacts (unidirectional) 2 x NC + 2 x NO, latching NONE, operation angle 15°, max. angle 75°, contacts are made of silver.
For use in zone 21 ATEX approval
- Snap action contacts
- Direct opening
- 2 x M25 cable entries
- Fibre Glass Reinforced
- Polyester enclosure
- optional Cast Iron
- IP 67
Lever Limit Switches are for cutting off on limit positions or for signalling at reached positions of linear or swivelling movements. Tough, reliable, and quality engineered are the outstanding
features of this type of switch. Even under most ardous environments they withstand corrosive atmospheres, heavy duty service and mechanical impacts.
They comply with the demands of the new European standard EN 60079-31. By their certification and their marking with II 2D Ex tb IIIC Db IP67 T80°C they are approved for use in areas under conductive dust. They comply also to all other applicable European standards and are marked with the CE-mark.
The actuation lever of these switches is pressed by an internal spring into its middle, neutral position. This actuation lever can be displaced by an actuation bar or cam clockwise as well as anticlockwise out of neutral position. When displaced, the tripping of the contacts happens with snap-action and with direct opening (positive drive). When leaving the area of cam or actuation bar, the lever will turn back into its neutral position by the force of the internal spring and resetting happens with snap action. Optional is the latching in actuated position for manual reset.
These switches can be equipped with up to 4 micro switches, each incorporating either 1 NC-contact plus 1 NO or 2 NC-contacts, both types with self-cleaning surfaces reducing the electrical transition
resistance. The contact surfaces are of silver. Optional is a gold plating, recommendable at lowest tensions and currents.
The micro switches are tripped either independent on the direction of the actuation lever displacement (clockwise lever operation acts on the same microswitches as anti-clockwise) or tripped depending on the direction (for sensing the direction of displacement).
The lever can be mounted in 4 positions (4 x 90° by featherkey connection) on the shaft. The maximum possible displacement angle of the roller lever is 75°. The stable roller of the actuation lever is made of best carbonated polyamide and is sleeve-beared on the stainless steel axle.
2 different materials for the switch enclosures (same dimensions) make further selection necessary: On one hand the housing of cast iron: Most stable, normal resistant against corrosion (but much better than aluminium), costly in production, double 2-component coated. On the other hand the economic enclosure of thick walled, special for use in EX-areas permissible fibre glass reinforced polyester with reduced electrical surface resistivity: Same stability as cast iron and indisputable corrosion-resistant against saline water as well as most chemicals.
Technical data
- Conforms to standards EN 60079-0, EN 60079-31, EN 60947-5-1, with latching EN 60947-5-5, EN 60529, EN 60204
- Switches are marked II 2D Ex tb IIIC Db IP67 T80°C
- Itherm max 230VAC 4A, 24VDC 4A
- Utilization category
- silver contacts: AC-15 230V 1A, DC-13 110V 0,5A
- gold contacts: AC-12 230V 250mA, DC-12 110V 250mA
- Minimum current gold contacts:1mA@ 6VDC
- Cable cross section min 1,5mm²
- Cable inlets 2 x M25 threads, ex works closed by IP67-plugs
- Protection IP 67
- Ambient temperature Tamb -50°C up to 70°C (with signalling lamp „S“ -35°C up to 50°C)
- Max. temperature of surface of housing 80°C
- Material of housing
- LHP… fibre-glass reinforced polyester (BMC),
- LHM… cast iron
- Actuation lever Aluminium, roller made of polyamide
- Colour of housing
- LHP…. black,
- LHM… yellow optional other
- Weight 2,3 kg (LHP...), 7 kg (LHM...)
- Mounting 2 slotted feet for M10 screws
Values for the calculation of SIL or PL according EN 13849 and IEC 61508- B10 with latching 80000 cycles without latching depending on the actuation speed
- =1.5m/s 200000 cycles
- <1.5m/s up to 500000 cycles
- typ. share of dangerous faults 0.5
