Instruction Manual

ManualsBrandsRockwell Automation ManualsEquipmentPDC24 / PAC Chassis Power Supplies

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PDC24

/

PAC

October

200

5

–

Iss

ue 3

Triguard

SC300E

TECHNICAL

DESCRIPTIO

N

PHYSICAL

The

PSU

comprises

a front

plate

mounted

at

right

angles

to

a chassis

plate.

All

the

user

controls

and

indicators

are

mounted

on

the

front

plate

as

shown

in

Figure

1

-

1.

The

chassis

plate

supports

three

main

items:

• Power

supply

unit:

A self

-

contained

switch

-

mode

power

supply

unit

(SMPS).

•

Front

panel

PCB:

Contains

printed

wiring

and

physical

support

for

the

controls

and

indicators

that

are

viewed

and

accessed

from

the

front

panel.

• PSU

interface

PCB:

Contains

the

power

share

and

fault

alarm

circuits.

Interfaces

these

circuits

and

the

SMPS

to

the

SC300E

chassis

backplane

via

connector

PL3.

A ribbon

cable

connects

the

front

panel

PCB

to

the

SMPS.

A mechanical

stop

fitted

to

the

AC

system

chassis

power

supply

slots

(marked

AC

STUD)

prevents

the

insertion

of

a PDC24

into

a PAC

slot.