GE Vivid 7 - Page 385

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DIRECTION FC091194, REVISION 11 VIVID 7 SERVICE MANUAL
Chapter 5 - Components and Functions (Theory) 5 - 39
5-3-16 Front-End Controller Board, FEC (cont’d)
5-3-16-4 Inputs
5-3-16-4-1 DC Voltages
5-3-16-4-2 Signal Inputs
Table 5-29 DC Input Voltages
INPUT DESCRIPTION CONNECTED TO
+ 3.3 Vd
DC output voltage, distributed via Motherboard
(Backplane).
The “d” indicates that this voltage is used for digital circuits.
DC Power Supply via Backplane
+ 5 Vd
DC output voltage, distributed via Motherboard
(Backplane).
The “d” indicates that this voltage is used for digital circuits.
DC Power Supply via Backplane
- 5 Va
DC output voltage, distributed via Motherboard
(Backplane).
The “a” indicates that this voltage is used for analog circuits.
DC Power Supply via Backplane
+ 15 Va
DC output voltage, distributed via Motherboard
(Backplane).
The “a” indicates that this voltage is used for analog circuits.
DC Power Supply via Backplane
- 15 Va
DC output voltage, distributed via Motherboard
(Backplane).
The “a” indicates that this voltage is used for analog circuits.
DC Power Supply via Backplane
GND Distributed via Motherboard (Backplane) DC Power Supply via Backplane
Table 5-30 Signal Inputs
INPUT DESCRIPTION CONNECTION FROM
PRPRES Probe Present Relay Board
High Voltage V & I
Sense
Indicates the voltages and currents from the TX Supply TX Power
VME Bus
Used for communication with the rest of the system (not the
Front-End Boards).
Commands and data from the VME Bus can be routed via
the Front-End bus to the other boards in the Front-End.
The Back-End Processor