Electrical - DataKinetics DSC110 User Manual

4.3 Electrical

The converter consists of a chassis and the following plug in cards:
•
Central processor card
•
Solid state memory card
•
Signalling processor cards type CS6
•
Alarm card
•
Network card
4.3.1 DSC110 Chassis and Power Supply
The DSC110 is constructed from a number of cards that plug horizontally into both
sides of a card carrier fixed to the base and rear of the chassis. The chassis is
fitted with a cooling fan, hard disk, a power supply, a floppy disk drive and a front
panel display card.
The power supply converts either a nominal –48V DC supply or a switchable
110V/230V AC supply to regulated +5V, +12V, -5V and –12V DC supplies as
required by the converters electrical circuits. The input to this supply is switched
ON and OFF by the front panel switch.
The floppy disk drive is mounted at the front of the equipment, and may be used
with standard DOS format 3½ inch diskettes formatted to 1.44Mbytes. When the
disk drive is being accessed, the front panel disk drive indicator is illuminated. The
floppy disk drive is used for loading a new software release onto the converter and
for saving configuration data to disk for backup purposes.
The converter is cooled by a fan attached to the chassis also a fan that is internal
to the power supply.
4.3.2 DSC210 Chassis and Power Supply
The DSC210 chassis comprises a 20 slot passive backplane along with a power
supply module, floppy disk drive, fan power distribution and failure detection
module and a front panel display card.
The power supply converts the nominal –48V DC supply to regulated +5V, +12V, -
5V and –12V DC supplies as required by the DSC210 electrical circuits. The input
to this supply is switched ON and OFF by the front panel switch.
The floppy disk drive is mounted at the front of the equipment, and may be used
with standard DOS format 3½ inch diskettes formatted to 1.44Mbytes. When the
disk drive is being accessed, the front panel disk drive indicator is illuminated. The
floppy disk drive is used for loading a new software release onto the converter and
for saving configuration data to disk for backup purposes.
The converter has three fans that run directly from the –48V DC supply. A small
circuit board situated under the fan tray provides power distribution to each of the
three fans and a fan failure detection mechanism that allows fan failure to be
reported in the alarm log.
DataKinetics DSC110 / DSC210 User Manual Issue 12 Page 25