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Expansion
Subsystem
Chapter 2 - Hardware
Overview
Power Supply
ISA Processor Bay
Power Distribution Panel
Disk Drive Bay
Auxiliary Junction Panel
Installing the Subsystem
The Cubix Expansion Subsystem consists of five main sections. The Power Supply Bay houses a 350 watt power supply which provides power to the subsystem. The ISA Processor Bay contains the 16-slot segmented passive backplane. The Power Distribution Panel distributes power to the subsystem. The Disk Drive Bay provides optional disk drive support. The Auxiliary Junction Panel is an option which provides space for auxiliary I/O adapter boards to be installed.
Figure 2-1 Expansion Subsystem - Front Panel
Figure 2-2 Rear Panel
The Cubix Expansion Subsystem contains one internal 350 watt switching power supply.
This supply is fan cooled. When the power supply load is properly limited to 350 watts average, and the ambient operating temperature of the subsystem is maintained between 00C and 400C, the power supply will provide a long life of trouble-free service.
Load Considerations
The Expansion Subsystem has four available voltage sources: +5 vdc, +12 vdc, -12 vdc, and -5 vdc. The subsystem provides the following power levels for each of these four voltage sources.
Table 2 - 1
350 Watt Power Supply Ratings
+ 5V @ 50A = 250 watts maximum
+12V @ 16A = 192 watts maximum (Peak)
+12V @ 8A = 96 watts maximum (Steady State)
-12V @ 5A = 60 watts maximum
- 5V @ 5A = 25 watts maximum
Steady State Total Power Available = 350 watts maximum
Peak Total Power Available = 400 watts maximum
! Peak power is defined as the power required during the IDE hard
disk drive ramp-up time. This time is normally 10 seconds or less.
The user must ensure that no single voltage source power rating exceeds the maximum listed in Table 2-1. In addition, these maximums are limited by the fact that no more than 350 watts total power may be drawn from all voltage sources combined. It is the responsibility of the user to verify that the sum of the power drawn from the four sources does not exceed 350 watts.
The most straight forward method to determine if the power supply is capable of furnishing sufficient power is to add the power required for each voltage and calculate the total power using the power requirements in Table 2-2.
Table 2 - 2
Power Requirements (Watts)
Device +5V +12V> -12V -5V
QL 1044 12.0 1.0 0.6 -----
QL 2220 13.0 0.5 0.3 -----
QL 3001SX*** 11.0 0.5 0.4 -----
QL 3002SX*** 15.5 1.0 0.8 -----
QL 3002CX*** 18.5 1.0 0.8 -----
QL 4001DX/33 17.5 0.6 0.6 -----
QL 4001SX/25 17.5 0.6 0.6 -----
BC 3030SX/25*** 13.0 0.6 0.6 -----
BC 4000DX/33 21.0 0.6 0.6 -----
BC 4000DX/66 23.0 0.6 0.6 -----
BC 4030DX/33 16.0 0.6 0.6 -----
BC 4030DX/66 18.0 0.6 0.6 -----
BC 4030SX/25 14.5 0.6 0.6 -----
PA 3030 12.0 0.4 0.4 -----
Floppy Disk 4.0 ----- ----- -----
3.5 60/100MB IDE 2.0 13.0* ----- -----
Hard Disk (Conner 4.0**
CP30064/CP30104)
3.5 500MB IDE Hard 2.0 36.0* ----- -----
Disk (Conner CP3544) 9.0
3.5" 500MB SCSI 3.0 30.0* ----- -----
Hard Disk (Seagate ST1480N) 7.0**
Expansion Subsystem 2.0 ----- ----- -----
Interface Board
(A3480)
Host Interface 1.7 ----- ----- -----
Board (A3470)
Fan 10.0 ----- -----
-----
Ethernet NIC 5.0 0.5 0.4 0.5
Token Ring NIC 4.0 0.2 ----- -----
* Peak
** Steady State
*** These power figures are with the math coprocessor installed.
Subtract 1.0 watt on the +5 vdc if not installed.
For example, Table 2-3 illustrates the power requirements for a typical Expansion Subsystem.
Since each voltage and the total power consumption is less than the allowed maximum power consumption, the configuration in Table 2-3 can be properly powered with the 350 watt power supply.
Table 2 - 3
LCS Expansion Subsystem
Typical Power Requirements (watts)
Device Type Qty +5V> +12V -12V -5V Total
Expansion
Subsystem 1 2 ----- ----- ----- 2.0
Interface
Board
Token Ring 1 4 0.2 ----- ----- 4.2
QL 3001SX 14 154 7.0 5.6 ----- 166.6
Total 160 7.2 5.6 ----- 172.8
Maximum 250 192* 60.0 25.0 350.0
Allowed 96**
* Peak
** Steady State
This section contains a passive 16-slot ISA compatible backplane.
Power for the backplane is provided through a nine position barrier strip, located on the right end of the backplane. Three positions provide +5vdc, and two positions provide +5vdc ground. +12vdc, -12vdc, and -5vdc are each powered with a single line and a single ground referenced to +5vdc ground.
The power distribution panel distributes power to components within the Cubix Expansion Subsystem.
Figure 2-3 Power Distribution Panel.
Power is input to the panel from the power supply via the CML type connector labeled Input. The panel distributes this power to the other CML connectors labeled 1 through 8. These connectors may then provide power for any disk drives installed in the disk drive bay.
The power is also distributed to a 12 volt fan via the two-pin Fan connector and the Power On lamp on the front panel of the Expansion Subsystem via the two-pin Lamp connector.
! The Battery, Speaker, and four-pin connectors labeled 1 through 8 are not used in the Expansion Subsystem.
Some boards installed in the Cubix Expansion Subsystem may require access to a dedicated hard disk drive. The disk drive bay provides support within the subsystem to install these optional drives.
The disk drive bay in the Expansion Subsystem may be equipped to accommodate each of the following configurations:
* Up to eight third-height 3.5" hard disk drives (although the bay can support nine drives, only eight can derive power from the power distribution panel)
* Up to four half-height 3.5" hard disk drives plus one third-height 3.5" drive
* No disk drives
Each disk drive requires two connections: one for power and one for data. The disk drives derive power from a connector on the power distribution panel. The data cables for all disk drives installed in the subsystem are connected directly to the disk drive controller.
Any of four styles of optional auxiliary junction panel may be installed in the Cubix Expansion Subsystem. The Auxiliary Junction Panel is installed in the back panel of the subsystem. The auxiliary junction panel allows the user to customize solutions to a wide range of I/O requirements.
Since the amount of space for I/O connectors on the edge of each processor board is limited, board manufacturers must determine which I/O functions supported by the board will be accessible via an on-board connector and which functions will require an off-board connector. The auxiliary junction panel provides a location to install these off-board connectors.
The Cubix processor boards provide several I/O functions with internal headers. To access the I/O, these headers must be connected to an I/O adapter printed circuit board (PCB) designed for this purpose. This adapter board contains the standard connector to interface the internal header with the auxiliary I/O, and should be installed in an auxiliary junction panel on the Expansion Subsystem.
Following is an illustration of each auxiliary junction panel style.
Figure 2-4 DB-25 Auxiliary Junction Panel.
The panel illustrated in Figure 2-4 provides space to install up to sixteen DB-25 connectors. Typically this panel is used with Cubix QL Series processors to provide parallel printer support.
Figure 2-5 DB-9 and Mini-DIN Auxiliary Junction Panel.
The panel illustrated in Figure 2-5 provides space to install up to sixteen DB-9 and sixteen Mini-DIN connectors. Typically this panel is used with Cubix QL Series processors to provide video and keyboard support.
Figure 2-6 DB-25, DB-9, and Mini-DIN Auxiliary Junction Panel.
The panel illustrated in Figure 2-6 provides space to install up to eight DB-25, eight DB-9, and eight Mini-DIN connectors. Typically this panel is used with Cubix QL Series processors to provide parallel printer, video, and mouse support.
Figure 2-7 DB-25 and Mini-DIN Auxiliary Junction Panel.
The panel illustrated in Figure 2-7 provides space to install up to sixteen Mini-DIN connectors and one DB-25 connector. Typically this panel is used to provide QL mouse support and printer support for the host processor.
The Cubix Expansion Subsystem adheres to the specifications for standard 19" wide RETMA mounting positions. It can be installed in a Cubix System Cabinet or in any enclosure adhering to the 19" RETMA specification.
System Cabinet Installation
1. Determine the proper location in the Cubix System cabinet for the subsystem, depending on the system configuration.
2. Install the two cabinet mounting rails in the cabinet. Use the screws provided.
3. Pull the slider bars out of the cabinet rails until they lock into place (Figure 2-8).
4. Carefully align the subsystem rails with the slider bars and slide the subsystem in until it locks into place. Do not let the entire weight of the subsystem rest on the slider assembly until it is in place.
5. To slide the subassembly into the cabinet, press the locking buttons on each side of the slider assembly.
6. Repeat this procedure for each additional subsystem.
Figure 2-8 Subsystem Installation.
This document, and all Web contents, Copyright © 1997
by Cubix Corp., Carson City, NV, USA.
