Power Distribution - HP 743 Series Technical Reference Manual For Oems

Power Requirements

Power Distribution

Power Distribution
The VMEbus chassis connectors P1 and P2 distribute power to the Model 743 and Model
744 board computer's PC boards as follows:
Graphics cards receive power through the adapter board's P1 and P2 connectors. RAM cards
receive power through the RAM stack connectors. The system board and RAM card receive
power through the system board's P1 and P2 connectors.
NOTE: VME P1 and P2 connectors use two or more pins to carry power or grounds to the board
computer. Check the VME P1 and P2 pinout tables for exact pin identification for power and
grounds.
Figure 6-1 and Figure 6-2 illustrate the power distribution for the Model 743 and Model 744
VMEbus board computers. Figure 6-3 and Figure 6-4 illustrate the power distribution for the
GSC expansion adapter and the PMC adapters.
P2
GND
P1
Figure 6-1 Model 743 Board Computer Power Distribution Diagram
6-2
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
GSC Connector
+3.3
Regulator
+5
GND
GND
–12
+12
+5
GND
+3.3
+5
PCMCIA Connector
Electrical
Resetable
Fuse
Thermal
Fuse
GND
+5
GND
+5
Thermal
Fuse
+12 –12
SCSI
+5
Termination
Power
+5
PS/2–1
+5
PS/2–0
RAM
Stack 2
RAM
Stack 1
+12
AUI