HP Model 744 HP Model 744 Owner's Guide - Page 72

Table 3-4, Model 744 Current Requirements Worksheet, Ensure the backplane IACK and Bus Grant 0

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Table 3-4 3-6 Typical Installation in a VME Card Cage Configuring the VME Card Cage Model 744 Current Requirements Worksheet Each Model 744 Board Computer +5V dc Amps +12V dc Amps -12V dc Amps If 132 MHz, current for +5V dc is 4.7A 1 0.1A 0.1A If 165 MHz, current for +5V dc is 6.3A ______ RAM cards (see Table 3-2 or Table 3-3) ________ Graphics subsystems 2 x 0.9A each = FWD SCSI GSC card x 0.7A each = HCRX graphics board 2.0A PMC bridge adapter 0.6A PMC cards on bridge adapter 3 Totals for Model 744 board computer 1. Does not include on-board graphics, if installed. 2. On-board graphics and graphics accessory cards are each separate graphics subsystems. 3. PMC cards may also draw +3.3 current that is provided through the +5 on the bridge adapter. The +3.3 current FOR ALL PMC CARDS ON THE BRIDGE ADAPTER AND EXPANSION ADAPTER (do not include other expansion adapter currents) must be entered into the +5 column after multiplying the +3.3 current by .75 to convert to the actual +5 current draw. 3 Verify that your VME card cage has sufficient power to meet the total power needs of the Model 744 from Table 3-4. 4 Shut down your VME application and power off the VME card cage. If your VME card cage backplane is autoconfiguring, see "Model 744 Installation" later in this chapter. If not, refer to your VME card cage documentation for configuring the VME backplane. Go to Step 5. 5 Ensure the backplane IACK and Bus Grant (0, 1, 2, and 3) daisy-chains are: • Enabled from the previous slot(s) into the slot in which the Model 744 will be installed. • Passed through all other empty backplane slots. 6 Set the backplane switches/jumpers to enable the Model 744 operation.

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3-6
Typical Installation in a VME Card Cage
Configuring the VME Card Cage
3
Verify that your VME card cage has sufficient power to meet the total
power needs of the Model 744 from Table 3-4.
4
Shut down your VME application and power off the VME card cage.
If your VME card cage backplane is autoconfiguring, see “Model 744 In-
stallation” later in this chapter. If not, refer to your VME card cage docu-
mentation for configuring the VME backplane. Go to Step 5.
5
Ensure the backplane IACK and Bus Grant (0, 1, 2, and 3) daisy-chains
are:
•
Enabled from the previous slot(s) into the slot in which the Model 744
will be installed.
•
Passed through all other empty backplane slots.
6
Set the backplane switches/jumpers to enable the Model 744 operation.
Table 3-4
Model 744 Current Requirements Worksheet
Each Model 744 Board Computer
+5V dc
Amps
+12V dc
Amps
-12V dc
Amps
If 132 MHz, current for +5V dc is 4.7A
1
If 165 MHz, current for +5V dc is 6.3A
______
0.1A
0.1A
RAM cards (see Table 3-2 or Table 3-3)
________
Graphics subsystems
2
x 0.9A each =
FWD SCSI GSC card x 0.7A each =
HCRX graphics board
2.0A
PMC bridge adapter
0.6A
PMC cards on bridge adapter
3
________
________
Totals for Model 744 board computer
________
________
1. Does not include on-board graphics, if installed.
2. On-board graphics and graphics accessory cards are each separate graphics subsystems.
3. PMC cards may also draw
+3.3 current that is provided through the +5 on the bridge adapter.
The
+3.3 current
FOR ALL PMC CARDS ON THE BRIDGE ADAPTER AND EXPANSION
ADAPTER (do not include other expansion adapter currents) must be entered into the +5 column
after multiplying the +3.3 current by .75 to convert to the actual +5 current draw.