Primary Power Supply; Air Deflector/Filter Unit; Fan Unit - Studer OnAir 3000 Service Instructions Manual

3.5

Primary Power Supply

3.6

Air Deflector/Filter Unit

3.7

Fan Unit

Date printed: 28.02.11
The 200 W primary power supply unit is auto-ranging (100...240 VAC,
50...60 Hz) with integrated power factor correction. A status output signal is
available on the 15-pin D-type front panel socket. The fan unit's supply can
be taken from this socket as well.
FAN/STATUS Connector (15-pin D-type, female, UNC 4-40 thread)
Pin Signal
1 +24 VDC (fan supply, 650 mA max.) 9 GND
2 reserved - do not connect!
1
9
3 GND
4 * Relay NO (normally open)
5 ** Fan supply OK (active low)
15
6 * Relay COMMON
8
7 GND
8 Relay NC (normally closed)
Solder/Crimp
View (or
Socket View)
If the power dissipation of an SCore Live frame is between 50 and 100 W,
air deflector/filter units must be used on top of and below the frame. For a
frame dissipating more power, a fan unit (see below) must be used at the
bottom of the frame, combined with an air deflector/filter unit on its top. If
space is available, a second air deflector/filter unit may be used below the fan
unit, increasing the air intake cross-section and thus improving the cooling
efficiency.
For more information on cooling and guidelines for power dissipation estima-
tion refer to chapter 1.2.2, paragraph 'thermal considerations'.
In cases where the power dissipation of an SCore Live frame exceeds 100 W,
active cooling is imperative. If no cooling system for the whole rack is used,
this 1U fan unit is required underneath the frame. Seven fans draw air in from
the front (filtered) and from the bottom (unfiltered) and blow it out upward.
The bottom is open and allows installing an additional air deflector/filter unit
underneath the fan unit as described above, increasing the air intake cross-
section. In most cases, however, closing the fan unit's bottom with a piece of
metal sheet is sufficient.
Pin Signal
10 n.c.
11 n.c.
12 reserved - do not connect!
13 ** Fan in (active low)
14 reserved - do not connect!
15 n.c.
* Contacts closed if everything is ok
** Status signals, foreseen for fan supervision
SCore Live
A943.0304
A949.0599
A949.0597
SCore Live 23