Dual Grounding Environment

Caution –To be compatible with grounding environments requiring isolation between logic 0V and chassis ground, the fitted grounding bridge plate must be removed and individual connections made to logic 0V and chassis ground studs. The grounding bridge plate is located on the middle rear left edge of the unit between the motherboards. The grounding studs at the base of the chassis are M5 studs with appropriate nuts already installed.

Before installation for dual grounding systems, remove the link from the chassis to logic 0V. This exposes a 2-hole lug with tapped M5 threads (refer to FIGURE 3-3).

Caution –The use of certain PCI cards causes the frame and logic grounds to be commoned. Refer to the documentation supplied with the PCI card.

▼To Connect the Ground Lead

1.Strip 9mm of insulation from each end of the grounding lead.

2.Insert the lead into the Thomas & Betts two-hole lug provided (part no. 52024-UB). Ensure that both the conductor and its insulation are gripped by the lug.

3.Position the lug and grounding lead assembly over the grounding studs.

Refer to FIGURE 3-3on page 3-50. Tighten the two M5 nuts over the locking washers provided.

4.Make the connection to the earthing bar at the end of the grounding lead. Ensure there is adequate strain relief for the cable.

Chapter 3 Electrical Supply Installation 49

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Sun Microsystems 1800 manual Dual Grounding Environment, To Connect the Ground Lead
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1800 specifications

Sun Microsystems, founded in 1982, unveiled an array of innovative products over the years, among which the Sun-1 workstation and later the Sun-1800 series were significant contributions to the technology landscape. Designed specifically for engineering, graphics, and computing tasks, the Sun-1800 series emerged during a period when workstations were essential for high-performance computing applications.

The Sun-1800 series was powered by the SPARC architecture, which became a hallmark of Sun Microsystems' technological advancement. SPARC, an acronym for Scalable Processor Architecture, allowed the system to achieve high levels of performance and efficiency, positioning it well against competitors in the workstation market. The SPARC processors used in the Sun-1800 series enabled faster computation and multitasking, making it well-suited for scientific applications, computer-aided design (CAD), and complex data analyses.

One of the standout features of the Sun-1800 series was its expansive memory capabilities. Supporting configurations that could house up to 128 megabytes of RAM, the workstations were excellent for handling large datasets that were prevalent in research and corporate environments. This high memory capacity, combined with the efficient use of the SPARC architecture, granted users access to significant computational power, which was crucial for multitasking in complex job environments.

The Sun-1800 series also emphasized networking capabilities, with integrated Ethernet support. This allowed users to seamlessly connect their workstations into local area networks, facilitating collaborative projects and data sharing among teams. The use of the Solaris operating system, which was based on UNIX, also provided a robust and stable environment for enterprise applications, making the Sun-1800 ideal for business-critical applications.

Moreover, the system was designed to support various programming languages and development tools, attracting engineers, scientists, and software developers alike. Sun Microsystems also focused on providing high-quality graphics support, with advanced graphical capabilities that enabled users to engage in advanced visualization tasks, such as 3D modeling.

In summary, the Sun Microsystems 1800 series stands out for its powerful SPARC architecture, impressive memory capacity, integrated networking, and robust graphic capabilities. These characteristics, combined with the reliability of the Solaris operating system, positioned the Sun-1800 as a favored choice among professionals in engineering and scientific fields, shaping the future of workstation computing.
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