Manual and Data Sheet NSE Version 1.0
Variotech – Emergency power supply unit NSE Version 1.0
Date: 10.01.14, Page 2 of 7
In preparing this manual we have used the utmost care, but we cannot guarantee the accuracy of
this manual, because mistakes cannot be avoided 100%.
The contents of this manual can be changed anytime without notice. For improving information we
will be grateful.
This safety control is designed exclusively for use in a lift control system as power supply for an A3-
brake element and may be used only as specified in this manual.
This description contains the information necessary for the intended use of the power supply unit NSE.
Knowledge about the safety of the operating field 'Lift' is assumed.
These skills are fundamental for the understanding of this description.
General:
The power supply unit NSE is destined for use as power supply of an A3 safety control and the A3
brake element.
It guarantees an uninterrupted supply of power for the control unit ENA3 and the 24V trigger coil of the
actuator (A3 brake element). This prevents an unwanted triggering of the actuator caused by a power
failure.
The NSE consists of a pre-wired and pre-assembled ENA3 controller, a 24V power supply and battery
backup (NSE).
The power supply NSE requires an input voltage of 13.6 V DC, galvanically isolated from the mains
power supply.
The power supply NSE generates the charging voltage for a 12V battery and an uninterruptible
buffered voltage of 24VDC for the A3 safety control as well as for the A3 brake element (coil).
Legend
:
Particularly important information in the manual are identified as follows:
DANGER! + WARNING!
This notice must be strictly observed. The sign warns of imminent danger, which can
cause serious injury and death.
ATTENTION!
This note indicates attention to a hazard and informs of appropriate precautions to
prevent minor injuries and property damages.
IMPORTANT! - INFO!
This note presents situations that can lead to damage of equipment or facilities, and
provides tips for proper application and also provides information on key passages and
other special features.
Safety guidelines:
The safety instructions are an important part of the operating manual. In consequence of
non-compliance of the instructions, all warranty claims and warranties, as well as
potential liability claims are lost. Moreover all regulations on accident prevention for lifts
must be observed. All local rules must be taken into account to prevent damage due to
improper handling with voltages and currents. Especially concerning protection measure
and correct earthing.