Chapter

4.

Power supply

 

 

 

 

 

Note:

Some

adapters and

hard disk drives draw more current than the recommended limit

 

adapters and drives can be

installed

in

the system;

however,

the

power

supply

 

total

power

used

exceeds

the

maximum

power

that

is

available.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Output protection

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The power supply protects against

output

overcurrent,

overvoltage,

and

short

circuits.

supply specifications

on

the

previous

pages

for

details.

 

 

 

 

 

 

 

 

 

A short circuit that is placed on

any

dc

output

(between

outputs

or

between

an

ou

latches

all

dc

outputs

into a shutdown state, with no damage to

the power

supply. I

occurs, the power supply returns to normal

operation

only after

the

fault has

been

 

switch

has

 

been

turned

off for at least one second.

 

 

 

 

 

 

 

 

 

 

If

an

overvoltage

fault

occurs

(in

the

power

 

supply),

the

power

supply

latches all

 

shutdown

state

before

any

output

exceeds

130%

of

the

nominal

value

of

the

power

su

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Connector description

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

The

power

supply

for

the

PC

300GL

has four, 4-pin connectors

for

internal

devices. The

by

the

connectors

must

not

exceed

the

amount

shown

in

“Component

outputs”

on

page 18.

connector pin

assignments,

see

Appendix A,

“Connector

pin

assignments”

on

page 25.

 

 

 

Chapter 4. Power supply19

Page 27
Image 27
IBM 6288, 6268, 6278 manual Output protection, Power That Available, Nominal Value Power, Power supply

6278, 6268, 6288 specifications

The IBM 6278, 6288, and 6268 are part of IBM's extensive lineup of mid-range computers, specifically tailored for business environments in the late 1980s and early 1990s. These systems were designed to handle substantial data processing tasks, facilitating efficient business operations with robust performance and reliability.

The IBM 6278 was notable for its high-performance capabilities, making it suitable for a variety of applications ranging from transaction processing to complex computations. One of the main features of the 6278 was its multiprocessing capability, which allowed it to run multiple tasks concurrently. This was achieved through a combination of advanced hardware and software that optimized performance and resource allocation.

Similarly, the IBM 6288 was recognized for its versatility and scalability. This system incorporated enhanced memory management and was capable of handling larger workloads than its predecessors. The 6288 was designed with user-friendly interfaces and supported various input/output devices, making it easier for organizations to integrate into existing IT infrastructures. Additionally, it provided improved connectivity options, essential for modern networking needs at the time.

The IBM 6268, on the other hand, offered a balance between cost and performance, appealing to smaller businesses or those with less intensive data processing requirements. Despite being less powerful than the 6278 and 6288, the 6268 still managed to include essential features such as reliable data storage, effective processing speed, and compatibility with IBM's extensive software ecosystem.

All three models utilized IBM's proprietary operating systems, which were well-known for their robustness and security features. They were built with technologies such as error detection and correction, ensuring the integrity of data processing tasks. The architecture of these systems also allowed for easy upgrades, enabling businesses to expand their capabilities without a complete overhaul of their IT infrastructure.

In summary, the IBM 6278, 6288, and 6268 represented a significant advancement in mid-range computing technology during their era. Their main features encompassed multiprocessing, scalability, and user-friendly interfaces, making them valuable assets for businesses seeking reliable and efficient computing solutions. These systems laid the groundwork for future innovations in business computing, and despite their age, they remain a significant part of IBM's legacy in the computing industry.