Terumo BCT Trima Accel, Service Manual

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• 24 V current sense line (DC voltage) from the motor driver CCA must not trigger the solenoid fault
line
• Safety CCA must turn off the 64 V switch
• Lock solenoid power must be enabled
–
Safety system controls the lock solenoid power and turns off the solenoid power if the
centrifuge spins over 60 rpm
– For safety reasons, it is not possible to have both the solenoid energized and the centrifuge
motor powered up (64 V switched)
– During boot-up, a T1 door lock test is performed that locks and unlocks the door solenoid
Figure 2-23: Door lock system diagram
Control Computer
Door lock movement is initiated when the device software or STS tells the control computer to
lock or unlock the door. The control computer tells the control CCA field-programmable gate
array (FPGA) to actuate the door lock solenoid and also informs the safety computer what it told
the control CCA FPGA through an Ethernet connection. This is a redundant system used to
ensure that the device fails in a safe state. An alarm is generated if the safety computer notices a
difference between the control and safety conditions.
Door System
Trima Accel
®
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