2N Lift emergency phone 2N LiftNet - Manual, 1446 v1.8.3 - Manual (Page 31)

Lift Cabin Audio Unit
– Universal
2.2
31
Note
 If external LEDs are connected to connectors 7 and 8, on-board LEDs 1
and 2 will not be shining.
Address Setting
The audio unit address means setting of two jumpers,
namely the lift number (1 to 8) and audio unit position
(refer to the cover drawing). If you install the audio unit
in the cabin of lift 1, you need not change the jumper
configuration. In other cases, follow the instructions
below:
Instructions
1. Release slightly the three screws on the
electronics cover.
2. Slide the cover to the right to expose the
jumpers.
3. Set the required changes as shown on the
electronics cover.
4. Replace the cover and tighten the screws.
Notes
 Make sure that two audio units do not have an identical address to avoid
system error.
 The position-setting jumpers are employed exceptionally, e.g. where a
certain audio unit type is used in a position other than normal.
 To recover the initial address setting, follow the drawing on the cover.
Bus Connection
The connection polarity is arbitrary.
Warning
 Connection to different, e.g. higher-voltage, cables leads to damage or
destruction of the audio unit.
Caution
 The unit is powered via a 2-wire bus from the central unit. Unplugging of
the bus from the CU causes switching off of the unit.
 Avoid the audio unit address duplicity.
Figure 2.6 Address Setting for Lift Cabin
Audio Unit – Universal