ABB Triguard SC300E User manual

Triguard

SC300E

MDO16GNS

16-Channel Digital Output Module

48Vdc

(MDO16GNS)

Issue

2

October

2005

INTRODUCTION

PURPOSE

The

48Vdc

Digital

Output

Module

MDO16GNS

provides

the

output

control

interface

between

the

SC300E

processing

environment

and

up

to

16

field

items.

All

field

outputs

from

the

module

are

galvanically

isolated

from

the

system.

Circuit

triplication

and

voting

procedures

make

the

module

single

-

fault

tolerant

and

latent

testing

ensures

that

the

failure

of

a normally

‘ON’

(energised)

or

‘OFF’

channel

will

be

recognised

a

nd

reported

to

the

system.

Front

panel

indicators

show

the

state

of

all

channels,

the

circuit

‘on

-

line’

status

and

the

health

of

the

module.

The

module,

which

is

compatible

with

‘dual

slot

hot

repair’,

can

be

fitted

in

any

of

the

ten

I/O

slots

in

the

SC300E

chassis.

‘Wrong

slotting’

is

prevented

by

physical

coding

. The

SC300E

main

processor

software

identifies

the

module

via

a built

-

in

hardware

identifier.

Channel

outputs

leave

the

module

via

the

DIN

41612

‘rear

plug

-

up’

system

on

the

chassis

backplane.

This

document

is

intended

to

provide

a general

understanding

of

the

function

of

the

module

sufficient

to

enable

basic

maintenance

operations

to

be

effected

in

the

field.

ASSOCIATED DOCUMENTATION

Reference

No

Title

008

-

5097

Chassis

User

Manual

008

-

5143

T

DO16AIE

16

-

Channel

Digital

Output

Termination

Card

Introduced

Power,

48Vdc

User

Manual

008-5141

2

MDO16GN

S

October

200

5

–

Issue 2

Triguard

SC30

0E

MDO16G

N

S

October

200

5

–

Issue 2

3

Triguard

SC300E MDO16GNS 16

-

Channel D/O Module 48Vdc

Mechanical

coding

block

(Upper)

ConfigurationLinks

Link3

ICC

B

HL

V

HW

GTZ

Figure

1

-

1 General

view

and

front

panel

detail

321

320

Link

1

Connector

J1

Common

Interface

(CI)

Module

Connector

J2

Connector

J3

Mechanical

coding

block

(Lower)

4

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SPECIFICATION

Model

MDO16GNS

Channels

16

Architecture

TMR

Indicators:

Input

Modules

One

per

point

Health,

3 x

On

Line

Output driver FET

Voltage

range

48Vdc

±10%

Voltage

drop

Less

than

3V

Maximum

drive

Resistive

load:

1A

per

channel

Tungsten

load:

0.125A

per

channel

Surge

limiting

3A

peak

Isolation

1kVdc

field

to

system,

commoned

supply

Minimum

load

per

output

12mA

(24mA

if

dual

slot

hot

repair)

Module

power

consumption

excluding

field

power

dissipation

in

module

4W

Module

power

consumption

including

field

power

dissipation

in

module

6W

@ minimum

load

36W

@ maximum

load

Overall

size

(mm)

Overall

size

(inches)

400(9U)H

x 397L

x 28W

15.75H

x 15.63L

x 1.1W

Weight

2.1kg

ENVIRONMENTAL

SPECIF

ICATIONS

The

maximum

ambient

temperature

measured

at

the

hottest

point

within

the

Triguard

system

shall

not

be

greater

than

60

degrees

centigrade.

Temperature

operating:

+5°C

to

+60°C

Temperature

storage:

-

25°C

to

+70°C

Humidity

5%

to

95%

non

-

condensing

at

ambient

<40°C

EMC/RFI

Immunity

Tested

and

certified

to

IEC

1131

-

Part

2 1994

Vibration/Shock

Tested

and

certified

to

IEC

1131

-

Part

2 1994

Certification:

Gene

ral

Certification:

Ref.

SC300E

TMR

Product

Guide

(ref

008

-

5209).

MDO16G

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5

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SC300E MDO16GNS 16

-

Channel D/O Module 48Vdc

TRANSPORT AND HANDLING

The

MDO16GNS

must

be

transported

and

stored

in

its

original

packing

material

which

should

be

retained

for

this

purpose.

6

MDO16GN

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TECHNICAL

DESCRIPTIO

N

PHYSICAL

The

MDO16GNS

is

a 9U

high

module

with

integral

front

panel

and

rear

connectors.

A

daughterboard

carries

the

common

interface

circuits.

Figure

1

-

1 shows

the

general

layout,

including

the

location

of

the

connectors

and

front

panel

details.

Mechanical coding blocks

All

Input/Output

modules

carry

two

coder

blocks

equipped

with

pins

which

mate

with

holes

in

corresponding

blocks

in

the

chassis

and

prevent

the

module

being

inserted

into

the

wrong

slot.

The

pins

in

the

module

blocks

are

factory

installed

in

a pattern

determined

by

the

module

and

corresponding

set

screws

are

removed

from

the

chassis

coder

blocks

to

enable

fitting.

Unused

holes

are

plugged

with

set

screws.

The

chassis

slot

coder

block

configuration

for

this

module

is

shown

in

Figure

2

-

1

.

Figure

2

-

1 Chassis

slot

coder

blocks

configuration

EXTERNAL

CONNECTIONS

Field

Circuits

The

field

load

circuit

shown

in

Figure

2

-

2 is

the

typical

required

for

the

safe

connection

of

field

loads

to

the

MDO16GNS.

For

any

unused

channel

a dummy

field

load

(value

10k

ohm)

should

be

used.

We

however,

recommend

the

use

of

their

16

-

Channel

Digital

Output

Termination

Card

TDO16AIE

which

offers

full

connection

facilities

with

dummy

loads,

indicating

fuses

and

alarm

outputs

(See

Section

1.2,

Associated

documentation).

MDO16G

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SC300E MDO16GNS 16

-

Channel D/O Module 48Vdc

Figure

2

-

2 Basic

field

load

circuit

Module connectors

The

system

bus

connector

is

J1

and

the

common

interface

is

connected

via

J4

and

J5

(not

shown).

All

the

digital

outputs

are

routed

through

connector

J2.

In

the

external

connection

diagram

(Figure

2

-

3 ) the

following

symbols

are

used:

0

= First

mate

(long

pin)

x = Connector

Earth

=

Connected

to

chassis

+ve

=

Field

supply

in

-

ve

= Field

supply

return

O/P

= Channel

output

WARNING

J3

1c

is

connected

to

earth.

All

other

pins

on

J3

are

connected

to

field

supply

return

but

this

field

supply

return

may

not

be

at

earth

potential

.

8

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Figure

2

-

3 Field

output

connector

J2

pinouts

Connector

J3

1c

is

connected

to

earth.

All

other

pins

on

J3

are

connected

to

field

supply

return.

THEORY OF OPERATION

The

channel

output

command

information

from

the

main

processor

follows

three

identical

paths

through

the

MDO16GNS

(see

Figure

2

-

4 ),

each

path

is

controlled

by

its

own

microcontroller

in

the

common

interface.

In

order

to

minimise

the

number

of

data

connections

acro

ss

the

1kV

system

-

to

-

field

barrier,

the

channel

data

are

converted

to

serial

form

before

entering

the

module

from

the

common

interface.

In

this

manner

16

output

channels

can

be

served

by

just

three

paths

instead

of

48.

The

three

data

streams

are

each

applied

to

opto

-

isolators

which

mark

the

interface

between

the

system

and

field

sides

of

the

circuit

and

provide

a system

-

to

-

field

channel

isolation

of

1kV.

MDO16G

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SC300E MDO16GNS 16

-

Channel D/O Module 48Vdc

The

data

streams

are

then

applied

to

the

16

-

bit

output

shift

registers.

The

serial

bits

are

clocked

s

uccessively

into

the

shift

registers

until

the

16th

bit

has

been

received.

The

registers

then

latch

the

data

and

present

it

on

the

16

-

bit

busses

(CHANA,

CHANB

and

CHANC)

to

the

output

switches.

The

data

is

continuously

refreshed

in

this

manner

and

updated

at

each

scan

of

the

SC300E

system.

The

output

switch

for

each

channel

comprises

six

FETs

connected

in

the

series/parallel

network

shown

and

providing

2 out

of

3 majority

voting

between

the

three

paths

A,

B and

C.

A

front

panel

LED

at

the

switch

output

is

lit

when

the

switch

is

closed.

Voltage

and

current

monitoring

circuits

are

also

connected

to

the

switches

to

provide

outputs

for

the

Latent

Fault

Detection

(LFD)

system.

These

outputs

are

fed

back

to

the

microcontrollers

via

dedicated

shift

registers

and

o

pto

-

isolators.

The

feedback

information

confirms

that

the

output

has

switched

to

the

commanded

state

and

that

the

line

is

not

open

or

short

circuit.

Testing

of

the

output

switches

by

the

LFD

circuits

is

co

-

ordinated

by

the

microcontrollers

on

the

common

i

nterface.

When

all

outputs

are

in

the

healthy

condition

and

the

microcontrollers

confirm

no

faults

present,

the

SC300E

processors

(main

processors)

will

instruct

each

microcontroller

in

turn

to

switch

its

output

alone

to

the

opposite

state

and

confirm

the

correct

operation

of

its

individual

output

switch.

The

module

power

requirements

are

served

from

two

different

sources.

The

power

for

the

output

-

side

circuits

is

derived

from

the

chassis

12V

supply

via

dc/dc

converters.

All

of

the

supplies

are

monitored.

Electronic

fuse

circuits

sense

the

current

in

each

output

path

and

cut

off

the

upper

FET

if

the

current

exceeds

a predetermined

limit.

An

On/Off

Line

Request

switch

on

the

front

panel

enables

a request

to

be

sent

to

the

SC300E

system

that

the

module

be

ta

ken

off

-

line

for

maintenance

purposes

or

returned

on

-

line.

The

module

contains

a hardware

identity

circuit

that

enables

system

identification

of

the

module,

and

three

manual

links

1,

2 and

3.

Link

1 allows

the

module

to

be

set

up

for

321

or

320

mode

operat

ion

which

sets

the

threshold

that

determines

how

much

of

the

circuit

can

be

degraded

while

still

preserving

overall

operation.

320

mode

means

that

the

system

will

continue

to

function

with

two

out

of

three

serviceable

circuits.

If

the

number

falls

to

one

o

ut

of

three

the

last

read

data

is

maintained.

In

321

mode

the

system

will

continue

to

function

with

one

out

of

three

serviceable

circuits.

If

that

fails

the

last

read

data

is

maintained

and

the

module

is

taken

off

-

line.

Link

2 (HLV/GTZ)

determines

whether

,

in

the

event

of

a failure

due

to

321/320

action,

the

last

read

values

are

held

(HLV)

or

are

set

to

zero

(GTZ).

Link

2 is

only

active

however,

if

Link

3

(ICCB/HW)

is

set

to

HW.

If

Link

3 is

set

to

ICCB

Link

2 is

ignored

and

its

function

determined

by

soft

ware.

10

MDO16GN

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DC

Figure

2

-

4.

MDO16GNS

–

Block

Diagram

MDO16G

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Triguard

SC300E MDO16GNS 16

-

Channel D/O Module 48Vdc

Common Interface

The

three

discrete

control

circuits

in

the

common

interface

(A,

B,

and

C)

are

each

responsible

for

the

control

of

the

corresponding

one

third

of

the

I/O

module

circuits.

Each

control

circui

t

comprises

a microcontroller

with

a dedicated

watchdog,

data

buffers

and

shared

RAM.

The

circuit

is

powered

via

the

module

and

permits

live

insertion

of

replacement

modules.

The

microcontrollers

co

-

ordinate

I/O

signal

processing

diagnostics,

on

-

line/off

-

line

status

and

signal

status

read/write

cycles

to

and

from

the

SC300E

processors

via

an

I/O

communications

bus.

All

I/O

modules

have

an

identification

code

which

is

read

by

the

common

interface

and

passed

to

the

main

processors

for

verification.

The

on

-

li

ne/off

-

line

status

is

determined

by

the

main

processors.

If,

for

maintenance

purposes,

the

On/Off

Line

Request

switch

on

the

front

of

the

module

is

operated,

the

action

is

read

by

all

three

microcontrollers

and

the

request

passed

to

the

main

processors

which

may

then

grant

the

request.

The

watchdog

on

each

microcontroller

extinguishes

the

Health

LED

on

the

I/O

module

front

panel

in

the

event

of

a

microcontroller

failure,

LFD

failure

or

a voting

discrepancy.

12

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Figure

2

-

5 Common

interface

-

Block

diagram

MDO16G

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13

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SC300E MDO16GNS 16

-

Channel D/O Module 48Vdc

SERVICING

SCOPE

Repair

is

by

module

replacement.

Faulty

modules

are

not

repairable

in

the

field.

They

should be

replaced

by

new

modules

and

returned

for

repair.

CAUTION

1

Before

fitting

a new

module

ensure

that

the

setting

of

the

configuration

lin

ks

are

the

same

as

that

on

the

old

module.

CAUTION

2

This

module

contains

components

that

may

be

electrostatically

sensitive.

It

should

be

transported

and

stored

in

its

original

packaging

material.

DIAGNOSIS

The

TriBuild

workstation

is

used

for

fault

diagnosis.

In

the

case

of

an

Input/Output

fault

the

Health

LED

on

the

faulty

module

will

be

extinguished.

PREPARATION

To

ascertain

whether

the

chassis

I/O

slot

containing

the

faulty

module

has

been

allocated

a

hot

repair

partner,

use

one

of

the

following

methods:

•

Check

the

system

drawings

• Check

the

chassis

wiring

configuration

• Use

the

I/O

chassis

Configuration

Report

on

the

TriBuild

workstation.

Where

there

is

a hot

repair

partner

allocation,

use

the

‘D

ual

-

slot

hot

repair’

procedure,

otherwise

use

the

‘Single

-

slot

hot

repair’

procedure.

CONFIGURATION

Before

fitting

a new

module

ensure

that

321/320

link

setting

is

the

same

as

that

on

the

old

module.

REMOVAL AND REPLACEMENT

CAUTION

3

Failure

to

take

the

faulty

module

off

-

line

before

removing

it

from

the

chassis

could

trigger

a fault

alarm.

CAUTION

4

14

MDO16GN

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October

200

5

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SC30

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When

inserting

a module

ensure

that

it

is

aligned

with

the

markings

on

the

chassis

rails

and

that

it

engages

with

the

top

and

bottom

guides.

Improper

insertion

may

cause

damage

to

the

module

and/or

chassis

conne

ctors.

MDO16G

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SC300E MDO16GNS 16

-

Channel D/O Module 48Vdc

SINGLE

-

SLOT HOT REPAIR

1.

Operate

the

On/Off

Line

Request

switch

on

the

faulty

module.

The

three

On

Line

LEDs

should

all

extinguish

to

indicate

that

the

main

processors

have

recognised

the

request

and

taken

the

module

off

-

line.

The

last

read

data

input

from

the

module

will

be

maintained

until

the

new

module

is

on

-

line.

2.

Slacken

the

two

module

securing

screws

and

use

the

black

ejection

levers

(top

and

bottom)

to

draw

the

module

from

its

slot.

3.

Insert

the

new

module

ensuring

that

it

engages

properly

in

the

upper

and

lower

guides

in

the

chassis.

The

top

and

bottom

chassis

rails

carry

alignment

marks

to

assist.

Pull

out

the

ejection

levers

and

as

the

module

is

pushed

back

engage

the

levers

on

the

chassis

rails.

The

levers

should

then

be

used

to

draw

the

module

into

position,

some

resistance

will

be

felt

as

the

rear

connector

pins

engage.

The

module

should

be

fixed

in

position

with

the

securing

screws.

4.

Operate

the

On/Off

Line

Request

switch

and

check

that

the

three

On

Line

LEDs

illuminate

for

one

s

econd,

extinguish

for

one

second

and

then

illuminate

permanently

to

indicate

that

the

module

has

been

put

on

-

line.

If

the

LEDs

do

not

illuminate

either

the

first

or

second

time

or

fail

to

remain

illuminated,

then

the

module

must

be

considered

faulty.

DUAL

-

SLOT HOT REPAIR

1.

Insert

the

new

module

into

the

vacant

hot

repair

slot

ensuring

that

it

engages

properly

in

the

upper

and

lower

guides

in

the

chassis.

The

top

and

bottom

chassis

rails

carry

alignment

marks

to

assist.

Pull

out

the

ejection

levers

and

as

the

module

is

pushed

back

engage

the

levers

on

the

chassis

rails.

The

levers

should

then

be

used

to

draw

the

module

into

position,

some

resistance

will

be

felt

as

the

rear

connector

pins

engage.

The

module

should

be

fixed

in

position

with

the

securing

screws.

2.

Operate

the

On/Off

Line

Request

switch

on

the

new

module.

Ascertain

that

the

three

On

Line

LEDs

on

the

new

module

illuminate

for

one

second,

extinguish

for

one

second

and

then

illuminate

permanently

as

the

LEDs

on

the

old

module

extinguish.

This

se

quence

indicates

that

the

new

module

has

been

put

on

line

and

the

old

module

taken

off

-

line.

If

the

LEDs

on

the

new

module

do

not

illuminate

either

the

first

or

second

time

or

fail

to

remain

illuminated,

the

new

module

must

be

regarded

as

faulty.

The

old

module’s

LEDs

should

remain

illuminated

indicating

that

it

is

still

on

-

line.

3.

If

the

new

module

is

serviceable

slacken

the

screws

on

the

old

module

and

use

its

ejection

levers

to

remove

it

from

the

chassis.

PREVENTIVE

MAINTENAN

CE

No

preventive

maintenanc

e is

necessary.

16

MDO16GN

S

October

200

5

–

Issue 2

Triguard

SC30

0E

SERVICE

SUPPORT

SPARES

Spare

parts

and

technical

advice

can

be

obtained

from

your

local

area

offices

.

ABB Triguard SC300E, MDO16GNS User manual

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