DAF LF45, LF55 Series. Manual - part 384

1

1427090/03

EL001558

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1000

1000

1000

1000

9001

9001

1000

A500

1

813

1/705

2/705

B525

A5/

752

E349

80A

2

1

D942

1000

1000

G525

C553

2

1

200440



2-25

5

ELECTRICAL SYSTEM

Electrical system

series

45/55

LF

ELECTRICALL

Y

OPERA

T

ED

MAIN

SWITCH

The

m

ain

switch

(D924)

can

be

closed:

-

electrically

in

the

cab

-

elect

rically

on

th

e

chassis

Closing

the

main

switch

electrically

in

the

cab

A

TTENTION:

switch

C854

must

be

in

the

“main

switch

on”

position

(connection

b

etween

contacts

1a

n

d

2)

.

Switch

C853

(switch

for

main

switch

in

cab)

connects

the

C

1

and

C2

connections

to

the

C4

and

C5

connections

via

w

ire

4176,

contacts

5

-

7

of

switch

C

853,

wire

4177,

contacts

1

-

2

of

switch

C

854

and

wire

4178.

Relays

G367

and

G368

are

immediately

energised

through

wire

4174

and

connection

point

A3

(A3

is

connected

to

earth

for

0.5

seconds).

This

closes

the

connection

between

points

88a

and

88

of

both

relay

G367

and

relay

G

368.

The

positive

and

the

negative

terminals

of

the

batteries

are

now

connected

to

the

vehicle’

s

power

supply

.

Immediately

after

switch

C

853

closes,

connection

point

C2

is

internally

connected

to

point

A7.

Connection

point

A5

is

connected

to

the

positive

terminal

via

w

ire

3173

after

connection

point

88

of

relay

G

367.

This

connection

transmits

a

signal

to

the

E

CU

to

indicate

that

relay

G

367

has

switched.

Closing

the

main

switch

electrically

on

the

chassis

A

TTENTION:

switch

C853

must

be

in

the

“main

switch

on”

position

(connection

b

etween

contacts

5a

n

d

7)

.

E501695

E153

G425

D924

E330

G367

C854

G368

Switch

C854

(switch

for

main

switch

on

the

chassis)

connects

the

C

1

connection

to

the

C4

and

C5

connections

via

w

ire

4176,

contacts

5

-

7

of

switch

C

853,

wire

4177,

contacts

1

-

2

of

switch

C

854

and

wire

4178.

Relays

G367

and

G368

are

immediately

energised

through

wire

4174

and

connection

point

A3

(A3

is

connected

to

earth

for

0.5

seconds).

This

closes

the

connection

between

points

88a

and

88

of

both

relay

G367

and

relay

G

368.

The

positive

and

the

negative

terminals

of

the

batteries

are

now

connected

to

the

vehicle’

s

power

supply

.

Immediately

after

switch

C

854

closes,

connection

point

C2

is

internally

connected

to

point

A7.

Connection

point

A5

is

connected

to

the

positive

terminal

via

w

ire

3173

after

connection

point

88

of

relay

G

367.

This

connection

transmits

a

signal

to

the

E

CU

to

indicate

that

relay

G

367

has

switched.

The

m

ain

switch

(D924)

can

be

opened:

-

electrically

in

the

cab

-

elect

rically

on

th

e

chassis

Opening

the

main

switch

electrically

in

the

cab

A

TTENTION:

switch

C854

must

be

in

the

“main

switch

on”

position

(connection

b

etween

contacts

1a

n

d

2)

.

Switch

C853

(switch

for

main

switch

in

cab)

disconnects

wire

4176,

contacts

5

-

7

of

switch

C853,

wire

4177,

contacts

1

-

2

of

switch

C854

and

the

C

1

and

C2

connections

from

the

C

4

and

C5

connections

via

w

ire

4178.

200440



2-26

5

ELECTRICAL SYSTEM

Electrical system

series

45/55

LF

Tw

o

actions

are

carried

out

immediately

after

switch

C853

is

opened:

1.

Connection

point

A7

is

connected

to

earth

(A2).

2.

After

a

delay

of

approx.

6

seconds,

relays

G367

and

G368

are

connected

to

earth

for

approx.

0.5

sec.

via

w

ire

4175

and

connection

point

A4.

T

his

breaks

the

connection

between

points

88a

and

88

of

relays

G367

and

G368.

The

positive

and

the

negative

terminals

of

the

batteries

are

now

disconnected

from

the

vehicle’

s

power

supply

.

If

the

engine

is

running,

it

is

switched

of

f.

Connection

point

A5

is

connected

to

the

positive

terminal

via

w

ire

3173

after

connection

point

88

of

relay

G

367.

This

connection

transmits

a

signal

to

the

E

CU

to

indicate

that

relay

G

367

has

switched.

Opening

the

main

switch

electrically

on

the

chassis

E501695

E153

G425

D924

E330

G367

C854

G368

A

TTENTION:

switch

C853

must

be

in

the

“main

switch

on”

position

(connection

b

etween

contacts

5a

n

d

7)

.

Switch

C854

(switch

for

main

switch

in

cab)

breaks

the

C1

and

C2

connections

to

the

C

4

and

C5

connections

via

w

ire

4176,

contacts

5

-

7

of

switch

C

853,

wire

4177,

contacts

1

-

2

of

switch

C854

and

wire

4178.

Tw

o

actions

are

carried

out

immediately

after

switch

C854

is

opened:

1.

Connection

point

A7

is

connected

to

earth

(A2)

in

the

unit.

2.

After

a

delay

of

approx.

6

seconds,

relays

G367

and

G368

are

connected

to

earth

for

approx.

0.5

seconds

via

w

ire

4175

and

connection

point

A4.

T

his

breaks

the

connection

between

points

88a

and

88

of

relays

G367

and

G368.

The

positive

and

the

negative

terminals

of

the

batteries

are

now

disconnected

from

the

vehicle’

s

power

supply

.

If

the

engine

is

running,

it

is

switched

of

f.

Connection

point

A5

is

connected

to

the

positive

terminal

via

w

ire

3173

after

connection

point

88

of

relay

G

367.

This

connection

transmits

a

signal

to

the

E

CU

to

indicate

that

relay

G

367

has

switched.

Note: When

one

of

the

switches

(C853

or

C854)

that

activate

the

electronic

unit

(close

m

ain

switch)

is

operated,

relays

G367

and

G368

are

activated

after

approximately

3

seconds.

If

one

of

the

switches

is

operated

again

w

ithin

the

3

seconds,

the

electronic

unit

(D924)

will

select

the

priority

‘main

switch

ON’.

VARIANTS

Location 76

G368,

main

switch

relay

,earth

fitted

depending

on

the

requirements

for

transporting

hazardous

substances

88,90

These

w

ires

are

only

present

if

ADR

is

fitted

94

Earth

connection

to

connector

834

is

only

present

if

ADR

is

fitted

97

Connector

831:

Only

present

if

th

e

syst

em

is

fit

te

d

w

ith

an

external

current

limiter

(D826)

98,101

Connector

832:

Only

present

if

th

e

syst

em

is

fit

te

d

w

ith

an

external

current

limiter

(D826)

99

Electronic

unit

for

VLG

current

limiter

(D826):

F

itted

depending

on

the

requirements

for

transporting

hazardous

substances.

V

ersion

with

production

date

<

2002-49:

current

limiter

(D826)

used

as

shown

98,101

V

ersion

w

ith

production

date

>

2002-49:

current

limiter

integrated

into

the

M

TCO

(B525)

200440



2-27

5

ELECTRICAL SYSTEM

Electrical system

series

45/55

LF

200440



2-28

5

ELECTRICAL SYSTEM

Electrical system

series

45/55

LF