QuickSpecs

ProLiant BL20p and p-Class system

Technical Specifications

Operating and Performance

Voltage

Nominal input voltage

-48 VDC

Specifications for Facility DC

 

Operating voltage range

-48VDC ± 10% or -43.2 VDC to -52.8 VDC

 

 

 

 

Max Input voltage slew rate

0.5V/uS

 

 

Redundant feed voltages*

*A and B feeds must differ by no more than

 

 

(A & B)

5VDC during steady state operation

 

 

Ripple/Noise

480 mV PARD**

 

 

Overshoot

Must remain within regulation limits on all feeds

 

 

 

 

during startup or shutdown

 

 

Voltage transients

Must not exceed -60 VDC

 

 

 

 

 

Current

Max steady state input current

62.5A per server blade enclosure installed at

 

 

 

 

-48VDC

 

 

Max steady state current per

 

 

 

feed/total

 

 

 

 

Power bus boxes

70 A/70A

 

 

 

Mini bus bars

210 A/210A

 

 

 

Scalable bus bars

210 A/350A or equivalent of 175A per feed*

 

 

 

 

In-rush current

Must support up to 2X the maximum operating current per server blade

 

 

enclosure (125 A) for up to 1.0 mS

 

 

 

 

Input over-current

Customer provided fusing for facility DC feeds that protects the system from

 

 

catastrophic over-current within 20 uS. Fuse should sustain all in-rush and

 

 

operating currents.

 

 

 

 

 

 

 

Max Input Current Slew Rate

1A/uS

 

 

 

 

 

 

Max Rated Power

3000W per server blade enclosure

 

 

 

 

Connections and Cables

Compaq provided facility DC cable connection kit:

 

 

The facility DC connection kit supports the connection of up to four -

 

 

 

48VDC, RETURN pairs and ground.

The power cable assemblies consist of 1/0AWG, colour-coded, flexible cable rated at 105° C, terminated with bus mating connectors at one end and unterminated at the other end. The cable length provided enables the customer to route to a fuse panel within or adjacent to the rack.

Note: *All systems support redundant A and B feeds. Scalable bus bars support dual A and dual B feeds.

**Periodic and random noise (PARD). Maximum allowable peak-to-peak ripple and noise (as measured at the load on any output channel). The ripple and noise is measured over a 20 Hz to 100 MHz frequency band. A resistive load (non-electronic) is used for this measurement. Each output is by-passed to return by a 10uF tantalum capacitor with an ESR less than 100 milli-Ohms in parallel with a 0.47 uF ceramic capacitor, at the point of load. The load cable is 12 feet of twisted wire capable of carrying the current. The printed wiring board assembly is installed in its enclosure for this measurement, or the measurement leads are properly shielded with Earth grounds applied to the insert.

DA-11411

Canada — Version 1 — August 26, 2002

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Compaq p-Class warranty Operating and Performance Voltage, Specifications for Facility DC, Current, In-rush current

p-Class specifications

The Compaq p-Class is a notable line of server systems that was introduced by Compaq in the late 1990s. Designed primarily for deployment in enterprise environments, the p-Class machines were built to address the growing demands for robust computing power and reliability. Targeting both internet and enterprise applications, these servers offered a compelling combination of performance, scalability, and manageability.

One of the remarkable features of the p-Class systems is their modular design. This architecture allows for easy upgrades and maintenance, which is a significant advantage for IT administrators looking to optimize their server investments over time. Users can swap out components such as processors, memory, and storage drives without extensive downtime or complex procedures.

The p-Class servers also featured advanced hot-plug capabilities, enabling the replacement of failed components without powering down the system. This is particularly crucial in mission-critical environments where uptime is paramount. Additionally, p-Class systems included redundancy in critical components, such as power supplies and cooling fans, to ensure maximum availability.

In terms of technology, the p-Class utilized powerful Intel processors, which provided a robust performance that was competitive for its time. The servers also supported a wide range of operating systems, including various flavors of Windows NT, Unix, and Linux, making them versatile for different enterprise applications.

A key characteristic of the p-Class was its ability to support a highly scalable architecture. Organizations could start with a smaller configuration and expand as their needs grew. This scalability, combined with Compaq's proactive management tools, allowed for effective monitoring and maintenance of server health.

Security was another focus area for the p-Class series, with features designed to help protect sensitive data and maintain integrity. Enhanced security protocols and management capabilities allowed IT staff to implement and monitor strict access controls.

The Compaq p-Class servers made a significant impact in the late '90s and early 2000s as businesses were rapidly evolving to meet the demands of digital transformation. With their robust features, modular design, and focus on reliability and performance, the p-Class servers helped lay the groundwork for modern enterprise server infrastructure, showcasing Compaq's commitment to innovation in a competitive market.