Terumo BCT Trima Accel, Service Manual

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Safety Computer
The safety computer monitors the pumps, valves, volumes, and flows to ensure the system is operating
within safe limits.
The safety computer monitors the system functions to make sure they are within safe limits. It verifies
the pump and centrifuge speeds by comparing data from the Hall-effect sensors to the speeds seen by the
control computer. The safety computer monitors the lower-level sensor for fluid and air to ensure
patient safety. It also monitors the AC detector. If any error is deemed “unsafe,” the safety computer will
generate an alarm and place the machine into the “safe state” by switching off the +24 V and +64 V
switched power supplies. The safety computer interfaces through the internal network to boot from the
hard drive by requesting the data from the control computer.
Figure 2-36: The safety computer
System Description
2-50 Trima Accel
®
Automated Blood Collection System • Service Manual