Coded magnetic safety switchesOverview
A magnetically operated switch is comprised of a coded switching magnet and a contact block (sensor unit). Evaluation requires a safety relay or connection to a bus system.
Enabling range (example)
The contact block and switching magnet must not be installed on ferromagnetic materials because the switching response will be influenced. Spacers can be used to prevent this.
3SE6 806 safety relay
Up to six protective devices (sensors) can be connected to the safety relay. The device has six current-sourcing semiconductor outputs (Y1 ... Y6) which signal the state of the connected protective devices.
The safety relay has two floating enabling circuits (safe circuits) as NO contact circuits and one floating signaling circuit as a NC contact circuit. The number of enabling circuits can be increased by adding one or more 3TK28 30 expansion modules.
Crossovers between the sensor circuits as well as ground faults and open circuits are detected by an internal monitor. The device is protected by an internal self-restoring PTC fuse (multifuse).
The green LED indicates the operating state:
LED POWER on: Supply voltage available
LED CHA 1 on: All NO contacts of the connected sensors are open
LED CHA 2 on: All NC contacts of the connected sensors are closed
SIRIUS 3SE6 magnetically operated switches are designed for mounting on movable protective guards (hoods, hinge switches, doors, etc.). Evaluation can be performed by means of a safety relay or through connection to a bus system.
The 3SE6 6 non-contact, magnetically operated safety switches stand out due to their enclosed design with degree of protection IP67. They are particularly suitable therefore for areas exposed to contamination, cleaning or disinfecting.
A magnetic monitoring system comprises one or more magnetically operated switches and an evaluation unit, e. g. a safety relay. If contact blocks 1 NO + 1 NC are used, the 3SE6 806 safety relay provides a high degree of protection against manipulation and can be installed in safety circuits up to SIL 3 according to ISO 61508.
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