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Electrical switch contacts
Magnetic snap-action contact model 821, inductive contact model 831, electronic contact model 830E, reed-contact model 851
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Applications
- Control and regulation of industrial processes
- Monitoring of plants and switching of electric circuits
- Indication of limit values
- Inductive contacts for safe switching, even in hazardous areas
- Process industry applications: in machine and plant construction, chemical and petrochemical industry, power plants, mining, onshore and offshore and environmental engineering
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Switch contact models 821, 830E, 831, 851
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Models of contacts
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Magnetic snap-action contact model 821
- No control unit and no extra power supply required
- Direct switching up to 230V/1A/30W
- Up to 4 switch contacts per measuring instruments
- Not suitable for PLCs
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Inductive contact model 831
- Can be used in Zone 1/21 (2 GD) hazardous areas
- Additional control unit required
- Long service life due to non-contact sensor
- Low reaction on the display accuracy
- Up to 3 switch contacts per measuring instrument
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Electronic contact model 830E
- For direct triggering of a Programmable Logic Controller (PLC)
- Long service life due to non-contact sensor
- Low reaction on the display accuracy
- Up to 3 switch contacts per measuring instrument
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Reed-contact model 851
- For direct triggering of a Programmable Logic Controller (PLC)
- Direct switching up to 250V AC/DC -1A, 60VA
- Single or double change-over contact, model 851.3 or 851.3.3
- Combines the electrical values of the 821 and 830E contacts
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