EC&M Crane Control Class 6121

Crane Control Class 6121 Wiring Diagrams

ELEMENTARY WIRING DIAGRAM FOR BRIDGE OR TROLLEY CONTROL

+

42

41

PR

1F

1R

3A

2A

1A

P

A1

SERIES BRAKE (IF USED)

SERIES FIELD

+

LSW

LSW

2FU

1FU

–

R4 R3 ACCEL RESISTOR

R2

M

S1

S2

2OL

1OL

ARM

R5

R1

(IF USED)

(IF USED)

INST

ITE

CRANE CONTROL CLASS 6121

+

–

FUSE 15A CSW

FUSE 15A CSW

A2

2R

2F

24

F F O MASTER SWITCH

REVERSE

1 2 3 4 FORWARD

4 5 3 2 1

5

10L

2OL

20

40

1

23

22

21

UV

UV

1R

2

20

26

25

1F

2F

2F

3

40

28

27

1R

2R

4

20

M

1R

40

2F

M

PR

5

30

31

29

P

1AR

P

6

40

20

32

33

1A

(1)

(3)

(.6 SEC)

2AR

1A

7

34

35

2A

(1)

(3)

(.6 SEC)

3AR

2A

8

40

20

37

36

3A

(1)

(3)

(.6 SEC)

X = CONTACT CLOSED

CONTACTOR SEQUENCE

5 4 3 2 1 1 2 3 4 5 X= POWER TIPS CLOSED REVERSE FORWARD O F F

DEVICE

1F 2F 1R 2R M P 1A 2A 3A

CONTACTORS 1R & 1F, 1F & 2R, 2R & 2F ARE MECHANICALLY INTERLOCKED.

55

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