Terumo BCT Trima Accel, Service Manual

Page: 114 / 340

Figure 2-39: Pump interconnect diagram
Valve Motors
All three valves receive enable and direction commands from the motor driver CCA. These commands
are generated by the control computer and routed through the control CCA to the motor driver CCA.
The valves are driven full
on or off with no speed control. Three optical sensors for each valve assembly
(all located on the valve sensor CCA) sense valve position. The signals are sent back to the control CCA.
When the control computer detects that the valve is in the commanded position, the drive signal is shut
off. The LEDs for the valve optical sensors are activated and sensed at one-minute intervals by the safety
computer to ensure that they are operational and functional.
Note: Only one valve motor is driven at a time. This includes the linear actuator.
Caution: The connectors for the display and valve cables are identical. If these cables are accidentally swapped,
electronic components will be damaged. Make sure these cables are plugged into the correct sockets.
Linear Actuator
The linear actuator uses two optical sensors to detect the position of the cassette. The sensors are
mounted on the cassette shaft housing. This signal is sent back to the control CCA and transferred to the
safety CCA for redundant monitoring. When the control computer detects that the cassette plate is in
the commanded position, the drive signal is shut off.
E-Box and Computer Systems
Trima Accel
®
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