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Essen Limit Switches type LSO-12 and LSO-21 are with 1 NO + 2 NC or 2NO + 1NC contacts, in open execution conforming to IS 6875. To prevent ingress of dust particles, switch elements are available with cover also.
| Cat. No. |
Design |
Enclosure |
Actuating Force
Kg. (max.)
(In direction of stroke) |
| LSO-12/*LSO-12C |
1 NO + 2NC |
Open execution |
1.0 |
| LSO-21/*LSO-21C |
2 NO + 1 NC |
Open execution |
1.0 |
* LSO-12C & LSO-21C
Basic switch elements with a cover.
Note: NC opens before NO close
| Electrical ratings : |
10 A at 500V AC
0.4 A at 440V DC non-inductive
0.8 A at 250 V DC non-inductive |
| Mechanical life : |
15,000,000 switching cycles (typical) |
| Contact life : |
Upto 15,000,000 switching operations
depending on breaking current (see graph) |
| Temperature and humidity : |
All switches are designed for use upto an ambient temperature of 50° C and 85% R.H. |
| Contact resistance : |
20 milliohm max. |
| Dielectric strength : |
2kV AC rms |
| Insulation resistance : |
1000 Mohms min. |
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