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Voltage Sensing Unit

In Enclosure

Releases key(s) after zero voltage detection of the of the induced voltage (back EMF) of a motors windings.

Direct drive operation - positively opens contacts
Suitable for machines with a rundown cycle
Enclosures in Polycarbonate (IP65) as standard
Special switch ratings, solenoid voltage and/or contact arrangements available on request
Solenoid monitoring contacts as standard
Permits access as soon as the machine comes to rest
No additional timer safety margin required

Standards	2006/95/EC (Low voltage directive), 2006/42/EC (The machinery directive), EN60947-5-1:2004, EN954-1:1997, EN1088:1996, EN13849-1:2006, EN62061:2005, EN12100-1:2003, EN12100-2:2003
Certifications	CE marked for all applicable directives
Category	Cat. 4, PLe (EN/ISO 13849-1) and SIL3 (EN/IEC 62061)
Functional safety data^*	B10d	7500000
	MTTfd	High > 385 years (42.614 years)
	CCF	90%
	DC	High 99% (with correct monitoring of both channels and including the opposite-mode monitoring switch)
	PFHd [1/h]	2,68E-09

* use the "Functional Safety Calculator" to calculate values with varying conditions

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