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7551-7552 Atex Explosion proof cross position limit switches
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Cross position limit switch designed to control the movement of overhead travelling cranes, hoists and complex machine tools in area with potentially explosive atmopheres. The choice of materials and technical solutions adopted enable use in harsh operating conditions.
Features
- Designed to guarantee excellent performance in the most challenging operating conditions.
- Rods with 4 maintained positions every 90°.
- 4 fixing holes.
- Positive opening NC contacts for safety functions.
- Mechanical life of switches: 1 million operations.
- Operation frequency: 3600 operations/hour max.
- IP protection degree: 7551-7552 is classified IP 65.
- Extreme temperature resistance: -25°C to +60°C.
- It features die-cast aluminum alloy enclosure, with bushings made of sinterized material and head made of zama to resist any violent impact, chemical aggression and rust and to reduce the need for routine maintenance operations on the head.
- All materials and components used are wear resistant and guarantee protection of the unit against water and dust.
Options
- 4 snap action switches with 1NO+1NC contacts or slow action switches with 1NC contact.
- 3 outputs for cable glands to reduce installation time and make wiring easier.
Certifications
- CE marking.
- Atex certification.
GENERAL TECHNICAL SPECIFICATIONS
| Ambient temperature | Storage -25°C/+60°C |
|---|---|
| Operational -25°C/+60°C | |
| IP protection degree | IP 65 |
| Insulation category | Class I |
| Operation frequency | 3600 operations/hour max |
| Cable entry | M20 |
TECHNICAL SPECIFICATIONS OF THE SWITCHES
| Utilisation category | AC 15 |
|---|---|
| Rated operational current | 250 Vac |
| Rated operational voltage | 3 A |
| Rated thermal current | 10 A |
| Rated insulation voltage | 300 Vac |
| Mechanical life | 1x106 operations |
| Connections | Screw-type terminals |
