OnAir 2000M2 Digital Mixing Console
2-6 Hardware SW V4.0 Date printed: 12.11.03
2.8 Redundant Power Supply (optional)
The optional external power supply unit for the OnAir 2000M2 console is
installed in a 19” 2U housing. Two of these supply units are used if redun-
dancy is desired (order no. 1.942.109.00). In such a case, the internal
power supply of the console is replaced by a connection unit equipped
with two 30-pin Siemens connectors. Each of these allows connection to
one of the external supply units.
Pcs Order no. Designation
2 * 1.918.220.xx Power Supply
2 1.918.225.xx Cable 2 m (longer cables on request)
Redundancy PSU Set (1.942.109.xx),
consisting of:
1 ** 1.942.106.xx Connection Unit
2 89.20.2011 Power Supply Main (earlier Versions)
or 1 89.20.2017 Power Supply Main (current Versions)
1 1.942.105.xx Power Supply
* Power Supply (1.918.220.xx), consisting of:
1 1.918.221.xx Sub Board PSU
1 1.942.107.xx Redundancy PSU Connection Board** Connection Unit (1.942.106.xx),
consisting of:
Cables to DSP and Level Meter Interface
+ miscellaneous mounting hardware
Note: For operation with the external redundancy PSU, please refer to the man-
ual shipped with the PSU.
2.9 Level Meters
Since the audio signals on the level meter connector have an internal, so-
called “left-justified” format, an interface is required for connecting the
meters. This Level Meter Interface (1.942.113) provides conversion for
two stereo channels from the internal format to analog as well as to
AES/EBU. Therefore almost any level meter can be used with the OnAir
2000M2.
Level Meter Interface
DSP Board
DAC
AES/EBU
DAC
AES/EBU
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