2N Lift emergency phone 2N LiftNet - Manual, 1446 v1.8.3 - Manual (Page 34)

Lift Cabin Audio Unit
– Universal
2.2
34
Indicator Connection
The basic configuration providing (using an external source) a sufficient illumination
intensity of indication elements is shown in the figure:
Requirements
 The DC power supply has to be backed-up.
Notes
 LN continues working except for the indicators during power outage.
 The indication elements (bulbs, e.g.) may have the maximum current of
200 mA each.
 Mind polarity in this case.
Alternative indicator connection (LED)
Today’s LED producing technologies help achieve a relatively good illumination
intensity at a low current supply. If a 5 mA LED (with diode loss of approx. 2V) is able
to provide efficient illumination in the lift, no power supply is needed. For this
configuration see
the figure below:
Notes
 The cables required for this configuration are not part of the standard
delivery but are available upon agreement.
 In this configuration, the auxiliary indicators on the PCB are not shining.
Figure 2.7 Basic
Indicator Connection for
Lift Cabin Audio Unit –
Universal
Figure 2.8 Alternative
Indicator Connection for Lift
Cabin Audio Unit – Universal