Document type:
Title:
Revision date:
Revision:
Installation Guide (MUT)
Mod. SY1527, universal multichannel power supply system
03/12/02
3
NPO:
Filename:
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Page:
00103/97:1527x.MUTx/03 HWGUIDE_REV3.DOC
62
22
Rear panel - Low
Fans
Power Supply
Section
Air Flow
Rear panel - High
Backplane
Boards
Fig. 3.2 –Air flow from the fan tray unit into the board section
CAUTION
THE DISTANCE FROM THE TOP OF A CRATE AND ANY OTHER OBJECT
MUST BE AT LEAST 15 CM!
3.4
Power Supply section
This section is located in the the mainframe’s front lower 4U-high part. It has four
housings where are placed the Primary Power Supply of the whole system logic (on the
bottom right) and up to three Power Supply Units (refer to Fig. 2.1 and Fig. 3.1, p.19).
The housings are equipped with special guides on which the power supplies slide until
they are plugged into the relevant power supply backplane.
The housings are numbered starting from right (
Housing 0
) to left (
Housing 3
).
The Primary Power Supply (Model A1531) furnishes the +/-12 V and +5 V at 320 W for
the system logic circuitry, while the +48 V at 750 W for the boards is generated by the
Power Supply Units (Model A1532).
The minimum system configuration consists of the Primary Power Supply and one Power
Supply Unit. The Primary Power Supply must always br placed in the slot on the right,
while the Power Supply Unit can be placed in any of the three slots left. Both the Primary
Power Supply and the Power Supply Units have bias pins for insertion into the relevant
mating holes of the backplane. In order to avoid a misplacement of the Primary Power
Supply, the latter has a bias pin placed in a different position with respect to that of the
Power Supply Units’ bias pins.