Square D > On-line Catalog > Products > Push Buttons and Operator Interface > 30 mm Push Buttons: Type K, KX, and SK Selector Switch Guide	Search

Digest 174 Quick Page Locator Enter a page number from our paper catalog to go directly to that page in our online catalog. Example: 5 - 3

Section - Page -

30 mm Push Buttons

Type K, KX, and SK Selector Switch Guide

Class 9001 / Refer to Catalog 9001CT0001

Shown below is a simplified method of selecting a selector switch to meet almost any combination of contact sequences.

Step No. 1

Determine the contact sequence(s) required. Set up a target table like the one shown for the example below.

 

Contact Sequence 0—contact open 1—contact closed
A	1	0	0
B	0	1	0
C	0	0	1

Step No. 2

Look for a cam type common to all sequences in table Table 19.178, Table 19.179, or Table 19.180. For the example above, Table 19.179 would be used. For the contact sequences A (1 0 0), B (0 1 0) and C (0 0 1) of the example above, cam types F and L are common to all three sequences.

Step No. 3

Next, use the cam type common to all the sequences (if several cam types are common, choose one) to find the operator type number. Go to the proper page number as indicated in the table below:

 

Number of Positions	Push Button Line	Page Number
2	Type K, Type SK, Type KX	19-59 to 19-60, 19-71 to 19-72, 19-86
3	Type K, Type SK, Type KX	19-61 to 19-62, 19-73 to 19-74, 19-89
4	Type K, Type SK, Type KX	19-63, 19-75, 19-90

If for the example above a manual return operator with a standard black knob is required and:

The F cam type is chosen, the operator type number is:

●	Type K—Class 9001 Type KS46B (from page 19-61)

●	Type SK—Class 9001 Type SKS46B (from page 19-73)

●	Type KX—Class 9001 Type KXSDFB (from page 19-89)

The L cam type is chosen, the operator type number is:

●	Type K—Class 9001 Type KS401B (from page 19-61)

●	Type SK—Class 9001 Type SKS401B (from page 19-73)

●	Type KX—Class 9001 Type KXSDLB (from page 19-89)

Step No. 4:

Determine the contact blocks required by using the same table in Step No. 2.

If, for the example above, the F cam type is chosen:

●	Use a 9001KA3 mounted on side no. 2 for sequence A (1 0 0).

●	Use a 9001KA3 mounted on side no. 1 for sequence B (0 1 0).

●	Use a 9001KA2 mounted on side no. 1 or 2 for sequence C (0 0 1).

If, for the example above, the L cam type is chosen:

●	Use a 9001KA2 mounted on side no. 2 for sequence A (1 0 0).

●	Use a 9001KA2 mounted on side no. 1 or a 9001KA3 mounted on side no. 2 for sequence B (0 1 0).

●	Use a 9001KA3 mounted on side no. 1 for sequence C (0 0 1).

One Type KA1 double circuit block can be used in place of one Type KA2 single circuit block plus one Type KA3 single circuit block mounted on the same side.

 

Table 19.178:

2 Position Selector Switch

If you require contact sequence—		Use Cam Type	Use Contact Block Type	Mount on side no. (See page 19-80)
1	0	E	KA3	1 or 2
		D	KA2	1 or 2
0	1	E	KA2	1 or 2
		D	KA3	1 or 2

 

Table 19.179:

3 Position Selector Switch

If you require contact sequence—

Use Cam Type

Use Contact Block Type

Mount on side no. (See page 19-80)

1

0

0

G

M

KA2

1

L

KA2

2

C

E

KA3

1

B

C

E

F

G

J

KA3

2

B

G

J

KA5 a

2

0

1

0

D

E

J

L

KA2

1

D

E

KA2

2

F

KA3

1

L

KA3

2

0

0

1

C

F

KA2

1 or 2

B

D

G

L

KA3

1

D

KA3