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BEL DIGITAL AUDIO
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The BM-A1 1U frame may be installed in 19 inch bays with 327mm depth including typical
cable and connector depth. The dimensions of the BM-A1 are 483x283x44.3. Its weight is
5kg and the max power dissipated is 60 W.
Ventilation is by natural convection and there are vents at each side and on the top and
bottom covers of the unit. Frames may be installed into bays, providing airflow through these
vents is not impeded.
Connector I/O
All connections, with the exception of the headphone socket, are provided on the rear panel
of the frame. All data connectors use 9 way 'D' type connectors.
Digital audio I/O may be supported with either XLR connectors for balanced audio or BNCs
for unbalanced audio, depending on the BM-A1version specified at the time of ordering.
Alarms connector pinout
Connector type: 9 way sub-D female
Pin
Description
1
Audio alarm out (TTL compatible active high)
2
Not used
3
Reset in (TTL compatible active low)
4
GND
5
Not connected
6
Not connected
7
Not connected
8
Not connected
9
Not connected
Note: TTL outputs can supply up to 10mA.
2004 BEL (Digital Audio) Ltd
BM-A1
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The BM-A1balanced audio version rear view
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Installation
Version 0.2
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