Philips CARDIOMD, Service Manual

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Detailed Description
1MAN0158-H11 04-2005 CSIP Level 1
CardioMD Service Manual
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3-21
ECG Trigger
The ECG Trigger connector is used to connect to an ECG gate. The gate is connected to the
detector EDC boards, where the trigger pulses are detected and embedded in the FireWire event
stream transmitted to the acquisition PC as time references used for the image framing process.
E-Stop
One E-Stop button is located on the gantry side panel. Furthermore, a connector connects the E-
Stop button located next to the acquisition PC to the safety circuit of the gantry.
Note . If the external E-Stop next to the acquisition PC is not connected, no motions are possible.
Hand Controller
The 25 pin sub-D female connector interfaces the hand controller to the safety board and motion
controllers.
3.2.7 Hand Controller
The hand controller is connected to the safety board via the side panel. The Collision Override and
Motion Stop signals are used directly on the safety board, where the Stop signal via a relay turns
off all motion power. The Collision Override signal re-enables motion power. The Mark and Start
buttons are not used by the motion controllers, only by the acquisition PC.
Motion Stop activates a stop action on the safety board and is not recognized by the motion
controllers. When an Emergency Stop button has been activated, the safety board hardware
requires that Collision Override is activated via the hand controller in order to resume normal
operation.
The hand controller keypad (Figure 3.17) contains a number of motion keys and a number of
functional keys. These are detailed in Table 3.7.
Figure 3.17 The hand controller keypad
Motion keys Functional keys
Table out Motion enable/accelerate
Table in Mark
Detector out Start acquisition
Detector in Collision override
(OVR)
Rotate CCW Motion stop