Haemonetics ACP 215, Руководство по обслуживанию

Страница: 32 / 186

32 Equipment Description
P/N: SM-ACP215-01-EN(AB) Haemonetics
®
ACP-215
®
Service Manual
Top Deck
Distribution
Board
The top deck distribution board is also a signal routing board, with the addition
of active electronics. The device does not have a front panel distribution board.
These functions have been incorporated into the top deck board. The top deck
board has drive and regulation circuitry to run the valve compressor along with
a manifold to distribute the pressure to the corresponding valves.
The following components are interfaced by the top deck distribution board:

Blood and solution motors

Two air detectors

SPM and DPM

Line sensor

Six pneumatic valves

Pneumatic valve manifold

Pneumatic compressor drive

Pneumatic valve and compressor pressure sensor
Centrifuge
Distribution
PCB
The centrifuge distribution card interfaces the fans, the pressure switch, the
spill detector, the centrifuge cover switches, and the centrifuge power and
command signals to the backplane card. Its only active function is the control
of the +48 VDC supply to the centrifuge. The +48 VDC is controlled by relay
K1, which in turn is controlled by the presence of the +28 VDC cover switch
signal.
Centrifuge
Motor
Controller PCB
The centrifuge motor controller PBC drives the centrifuge motor at various
speeds, based on the analog voltage input and the enable signal. The
centrifuge has a tachometer feedback system, which is used by the centrifuge
motor controller PCB and the CPU to monitor the actual speed of the centrifuge
spindle. The centrifuge motor controller PCB is capable of disabling its output
if it detects an overspeed.
Circuit Description
The CPU writes commands to the D/A on the driver card. The output voltage
(0–10 VDC) is then buffered and applied to the motor controller input. The CPU
also writes commands to the driver card to generate the enable signal.
The tachometer pulses (two per revolution) are optically isolated and fed to a
counter on the drive board which can be read by the CPU.