This guide explains how to connect an SBus Expansion Subsystem to a Sun Microsystems computer system. The SBus Expansion Subsystem supplies up to three additional SBus Slots and one or two optional internal hard disk drives.
If you are installing a SBus Expansion Subsystem, we recommend that you install you Subsystem using the following procedure:
The main components of the diskless SBus Expansion Subsystem are the following:
Figure 1-1 shows how the SBus Expansion Subsystem connects to a computer system.
You install the Expansion Adapter card, an SBus card which controls the SBus Expansion Subsystem, into one of the master SBus slots of the computer system. You also install the device driver software for the Expansion Adapter card on the computer system.
You can insert one Expansion Adapter card in each SBus slot of the computer system. This SBus card transmits SBus-related information to the SBus Expansion Subsystem. You must install one Expansion Adapter card for each SBus Expansion Subsystem. Do not place an Expansion Adapter Card into an SBus Expansion Subsystem slot.
The SBus Expansion Subsystem cable is a shielded round cable. It connects to the Expansion Adapter card in the computer system and to the 96-pin connector on the SBus Expansion Subsystem back panel as shown in Figure 1-1.
The software for the SBus Expansion Subsystem consists of the following:
The SBus Expansion Subsystem contains the following hardware:
Figure 1-2 Internal view of the SBus Expansion Subsystem
The SBus Expansion Subsystem controller board is in the left rear of the SBus Expansion Subsystem as illustrated in Figure 1-2. This board contains three SBus card slots. You can install a variety of optional SBus cards into the SBus slots.
The SBus Expansion Subsystem controller board has the following functions:
The power supply, which provides power to the SBus Expansion Subsystem Box, is a self-contained metal assembly located at the right rear of the SBus Expansion Subsystem Box (refer to the previous figure).
You can install one or two optional internal hard disk drives. The SBus Expansion Subsystem is shipped without disk drives. Refer to your SPARC End User Price List for the types of drives you can install in the SBus Expansion Subsystem.
The SBus Expansion Subsystem back panel contains two SCSI connectors, an SBus Expansion connector, a fan grill, SBus card openings, an ac power receptacle, and the ON/OFF switch. The main components follow:
The SCSI connectors connect the optional internal disk drives in the SBus Expansion Subsystem to the computer system with an external SCSI cable. You can also connect other SCSI devices to the SBus Expansion Subsystem using the SCSI connectors.
You connect one end of the SBus Expansion Subsystem cable to the SBus Expansion connector (See Figure 1-3) and the other end of the cable to the connector of the Expansion Adapter card you installed in your computer system.
The grill covers the external opening of the fan in the power unit. This fan exhausts the excess heat generated by the power unit and it is not advisable to block this opening.
This is a rocker type switch that controls ac power to the SBus Expansion Subsystem. Press | to turn the system on and O to turn it off.
Insert the female end of the power cord that accompanies your subsystem into this receptacle. Insert the other end into a receptacle connected to a proper power source.
The factory ships the SBus Expansion Subsystem with EMI protection covers over the three SBus card openings. When you install an SBus in your subsystem, remove these covers before you insert the SBus cards.
Figure 1-3 SBus Expansion Subsystem back panel
To set up the SBus Expansion Subsystem, use a separate power cord connected to a grounded power outlet for each of the following devices:
Figure 1-4 Components of the SBus Expansion Subsystem
Figure 1-5 Optional parts of the SBus Expansion Subsystem
If you are going to install optional internal disk drive(s) in your SBus Expansion Subsystem, you must also order a minimum of one SCSI terminator.You may also need one or more SCSI cables to properly interconnect your system.
Note - All SBus cards conforming to the SBus architecture described in IEEE's "Standard for a Modular I/O Interconnect to Support Futurebus+, VMEbus, and Desktop Computers" should operate correctly when you install them in the SBus Expansion Subsystem. Please contact your supplier or original manufacturer for any questions concerning compatibility. If you are using a Sun Microsystems Computer Corporation SBus card, please see the hardware requirements in Chapter 3 of this document, the Compatibility Note that was included in the documentation package, or the Sun Price List for compatibility information. Although Sun Microsystems Computer Corporation SBus cards may not work in the SBus Expansion Subsystem hardware, they will work if plugged into the internal SBus slot of your computer system.
